Journal articles: 'Sulfate de manganèse'

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Talinli, I. "Pretreatment of Tannery Wastewaters." Water Science and Technology 29, no. 9 (May 1, 1994): 175–78. http://dx.doi.org/10.2166/wst.1994.0472.

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High Pollution treatment necessities were aimed at on COD basis (8000 mg/l). Case studies include the treatability study, conceptual design and monitoring of the actual treatment plant performance. To reach a pretreatment standard value of 800 mg/l COD, chemical and biological treatment were necessary including chromium removal and sulfide oxidation. Results of the treatability tests indicate that chemical coagulation is efficient and reliable in terms of COD removal. However, materials used in the process such as sulfuric acid and sodium sulfate and adding of manganese sulfate as catalyst for sulfide oxidation increase the sulfate concentrations in the influent of the biological treatment In this case, lime was used for coagulation both to reach sulfate standard and to protect the biological system.

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Mohamed, N., and SA Tariq. "A Study of Chemical Reactions in Molten Sodium Hydrogen Sulfate Potassium Hydrogen Sulfate Eutectic. V. The Reactions of Eleven Acetates." Australian Journal of Chemistry 47, no. 3 (1994): 571. http://dx.doi.org/10.1071/ch9940571.

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The reactions of the acetates of lithium, sodium, potassium, magnesium, calcium, strontium, barium, manganese, cobalt, zinc and lead with molten sodium hydrogen sulfate-potassium hydrogen sulfate eutectic were investigated by means of thermogravimetry, differential thermal analysis, X-ray diffraction, mass spectral and infrared methods. In these acid-base reactions, the metal acetates were found to be converted into the corresponding metal sulfates, and acetic acid was the volatile product of each reaction. The temperatures and stoichiometries of the reactions have been determined.

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Selvaraj, Ramesh K. "387 Effect of trace minerals (25-hydroxycholecalciferol, Zinc and Manganese) supplementation on the immune responses of livestock." Journal of Animal Science 98, Supplement_4 (November 3, 2020): 169. http://dx.doi.org/10.1093/jas/skaa278.310.

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Abstract Micronutrients such as 25-hydroxycholecalciferol, zinc and manganese are included in livestock feed to achieve optimal growth and improved immune function. Vitamin D (cholecalciferol) modulates immune responses. The effect of Vitamin D on immune cells depends on the subtype of immune cells. Monocytes and macrophages constitutively express Vitamin D receptor and hence 1, 25-dihydroxycholecalciferol increases maturation and the microbicidal activity of macrophages by increasing the production of nitric oxide, antimicrobial proteins and inflammatory cytokines and eventually acts to stimulate the innate immune system. On the other hand, 1,25-dihydroxycholecalciferol suppresses the action of adaptive immune responses by inducing T regulatory cells and increasing the production of IL-10. Superoxide dismutases (SOD) catalyzes conversion of superoxide radicals to oxygen and hydrogen peroxide and is considered a major antioxidant defense system in livestock. SOD is a metalloenzyme with zinc, copper, and manganese as a cofactor. Though trace minerals have traditionally been supplemented in animal diets as inorganic salts such as zinc sulfate and manganese sulfate, other forms of trace minerals have recently been promoted owing to better stability, bioavailability and absorption. Feeding layer diets marginally deficient in zinc and manganese as sulfates decreased the SOD activity, spleen, IL-1 and cathelicidin relative mRNA levels and supplementing zinc and manganese as hydroxychloride (OHCl) reversed the decrease in SOD activity, spleen IL-1 and cathelicidin relative mRNA levels. Feeding broiler diets low in zinc and manganese as sulfates decreased SOD activity, while supplementing the feed with ZnOHCl reversed the decrease in SOD. Increasing the MnOHCl in birds fed higher amounts of ZnOHCl further increased the SOD activity suggesting synergistic effects between ZnOHCl and MnOHCl on SOD activity and IL-1 production. In conclusion, micronutrients act to modify the immune response in livestock, and the form of micronutrients fed can increase the bioavailability of the micronutrients to improve the immune response.

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Moroz, O. M., S. O. Hnatush, O. V. Tarabas, C. I. Bohoslavets, G. V. Yavorska, and B. M. Borsukevych. "Sulfidogenic activity of sulfate and sulfur reducing bacteria under the influence of metal compounds." Biosystems Diversity 26, no. 1 (April 5, 2018): 3–10. http://dx.doi.org/10.15421/011801.

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Due to their high content in natural environments, heavy metals exhibit toxic effects on living organisms, which leads to a decrease in the biological diversity and productivity of ecosystems. In niches with low oxidation reducing potential, sulfate and sulfur reducing bacteria carry out the reducing transformation of oxidized sulfur compounds with the formation of significant amounts of hydrogen sulfide. H2S produced by bacteria interacts with metal ions, precipitating them in the form of sulfides. The aim of this work was to investigate the influence of lead, cuprum (II), iron (II) and manganese (II) salts on the production of hydrogen sulfide by bacteria of the Desulfovibrio and Desulfuromonas genera, isolated from Yavorivske Lake, and to evaluate the efficiency of their use for purifying media, enriched with organic compounds, from hydrogen sulfide and heavy metals. The content of heavy metal ions in the water of Yavorivske Lake was determined by the spectrophotometric method. The bacteria were grown for 10 days at 30 °C in the Kravtsov-Sorokin medium under anaerobic conditions. To study the influence of metal ions on bacteria growth and their H2S production, cells were incubated with metal salts (0.5–4.0 mM), washed and grown in media with SO42– or S0. To determine the level of metal ions binding by H2S, produced by bacteria, cells were grown in media with metal compounds (0.5–4.0 mM), SO42– or S0. Biomass was determined by turbidimetric method. In the cultural liquid the content of H2S was determined quantitatively by spectrophotometric method, and qualitatively by the presence of metal cations. The content of metal sulfides in the growth medium was determined by weight method. Sulfate and sulfur-reducing bacteria were resistant to 2.0 mM Pb(NO3)2, 2.5 mM CuCl2, 2.5 mM FeCl2 × 4H2O and 2.0 mM MnCl2 × 4H2O, therefore they are promising for the development of biotechnologies for the purification of water resources contaminated by sulfur and metal compounds. When present in a medium with sulfates or sulfur of 1.0–1.5 mM lead, cuprum (II), iron (II) or manganese (II) ions, they almost completely bind with the H2S produced by bacteria in the form of insoluble sulfides, which confirms the negative results of qualitative reactions to their presence in the cultural liquid.

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Yuniarti, Ating, Nasrullah Bai Arifin, Muhammad Fakhri, and Anik M. Hariati. "Spore production and sporulation efficacy of Bacillus subtilis under different source of manganese supplementation [Produksi Spora dan Efisiensi Sporulasi Bacillus subtilis dengan Suplementasi Mangan dari Sumber yang Berbeda]." Jurnal Ilmiah Perikanan dan Kelautan 11, no. 2 (October 25, 2019): 51. http://dx.doi.org/10.20473/jipk.v11i2.15250.

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AbstractBacillus is a species widely used as a probiotic in the aquaculture industry. The Bacillus spores have more advantages than their vegetative ones, and an addition of minerals such as calcium, magnesium, and manganese can improve the spore production. The purpose of this study was to determine the effect of different sources of manganese on the production and sporulation efficacy of B. subtilis SB3. The sources of manganese used in this study were manganese chloride (MnCl2) and manganese sulfate (MnSO4) at the concentration of 10 mM. Media without manganese supplementation was used as a control. The results showed that there was a significant effect of different manganese sources on the spore production of B. subtilis SB3. The highest spore production was found in media with MnCl2 supplementation with the total spore of 8.77 x 107 spores. mL-1. However, spore production with MnSO4 supplementation was still higher (22.7%) compared to that without manganese supplementation. The decrease in spore production with MnSO4 supplementation was possible due to the sulfate inhibition. The high spore production in media with MnCl2 supplementation was also preceded by the high production of vegetative cells from B. subtilis SB3 (2.54 x 108 cells. mL-1). The results indicated that manganese could stimulate both vegetative cell growth and its spores. The highest sporulation efficacy (35%) was also achieved in media with MnCl2 supplementation. On the other hand, the germination rate of B. subtilis SB3 spores was not influenced by manganese supplementation.Abstrak Bacillus adalah species yang banyak digunakan sebagai probiotik pada industri akuakultur. Dalam bentuk spora, species ini lebih banyak mempunyai kelebihan dibandingkan dalam bentuk vegetatifnya dan peningkatan produksi sporanya dapat dilakukan dengan penambahan mineral seperti kalsium, magnesium dan mangan. Tujuan penelitian ini adalah untuk mengetahui pengaruh sumber mangan yang berbeda terhadap produksi dan efisiensi sporulasi B. subtilis SB3 indigenous akuatik. Sumber mangan yang dipakai dalam penelitian ini adalah mangan klorida (MnCl2) dan mangan sulfat (MnSO4) sebanyak 10 mM dan sebagai kontrol digunakan media tanpa suplementasi mangan. Hasil penelitian menunjukkan bahwa terdapat pengaruh yang nyata penggunaan sumber mangan yang berbeda terhadap produksi spora. Produksi spora tertinggi didapatkan pada media dengan suplementasi MnCl2 sebanyak 8,77 x 107 spora. mL-1. Sedangkan produksi spora dengan suplementasi MnSO4 juga masih lebih tinggi (22,7%) dibandingkan tanpa suplementasi magan. Penurunan produksi spora pada media dengan penambahan mangan sulfat diduga karena adanya penghambatan oleh sulfat. Tingginya produksi spora pada media dengan suplementasi MnCl2 sebelumnya juga didahului dengan tingginya produksi sel vegetatif dari B. subtilis SB3 (2,54 x 108sel. mL-1). Hal ini menunjukkan bahwa mangan dapat menstimulasi baik pertumbuhan sel vegetatif dan sporanya. Efisiensi sporulasi tertinggi juga dicapai pada media dengan suplementasi MnCl2 sebesar 35%. Di sisi lain, kemampuan germinasi spora B. subtilis SB3 tercatat sama dan tidak dipengaruhi oleh suplementasi mangan.

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6

Young, Jay A. "Manganese(II) Sulfate." Journal of Chemical Education 85, no. 7 (July 2008): 911. http://dx.doi.org/10.1021/ed085p911.

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Zou, Xing. "Improving in Oxidization Kinetics of Manganese Sulfate Hydrolyzates in Alkaline Solution Media." Advanced Materials Research 538-541 (June 2012): 2448–52. http://dx.doi.org/10.4028/www.scientific.net/amr.538-541.2448.

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The oxidization of hydrolyzates of manganese sulfate had been investigated in ammoniacal solution. The results show that hydrolyzates of manganese sulfate are oxidized slowly by air, furthermore, their oxidization rate less depends on temperature and acidity in the ranges of their respective certain values, but the oxidization rate for hydrolyzates of manganese sulfate can be increased significantly by adding some additives, activatiing hydrolyzates or changing molecular structure of hydrolyzates.

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Mendoza Bobadilla, Jorge Luis, Adolfo Enrique Guerrero Escobedo, Walter Moreno Eustaquio, Marina Ponce Zavaleta, and Luisa Carbajo Arteaga. "Influence Modeling and optimization of sulphide removal by catalytic oxidation of tannery fur effluents [Modelamiento y optimización de la remoción de sulfuros por oxidación catalítica de efluentes de pelambre de curtiduría]." Journal of Energy & Environmental Sciences 5, no. 1 (June 13, 2021): 20–28. http://dx.doi.org/10.32829/eesj.v5i1.126.

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The residual effluents from the fur stage of the bovine leather tannery industry are characterized by having a high concentration of sulfides. The objective of this study was to evaluate the effects of aeration time and pH in the residual effluents of the leather stage of the tannery, with the catalysts MnO2 and MnSO4 separately; as well as, determine adjustment models through the response surface methodology and the optimal intervals of the best conditions that lead to a higher percentage of sulfide removal. For this reason, the sulphide removal percentage was evaluated from samples extracted from the pellet stage, by means of catalytic oxidation treatments; varying the catalyst, pH and aeration time. The catalysts used were manganese dioxide (MnO2) and manganese sulfate (MnSO4) and for each catalyst the pH was varied in the values of 8.5; 9.5; 10.2 and 13.4; likewise, the aeration time was varied in the values of 30, 60, 90, 120, 150, 180, 210 and 240 minutes. 64 treatments were carried out, with 3 repetitions each, reporting the average values of the sulfide removal percentage. The response surface methodology was used to adjust the correlation of the variables to a quadratic model; Likewise, through contour graphs the regions with the highest percentage of sulfide removal were easily identified and by superimposing contour graphs the optimal ranges of the variables pH and aeration time were determined for removal percentages greater than 98%. Based on this evaluation, it is proposed for treatments with manganese dioxide, aeration times between 160 to 240 min and pH between 8.5 to 9 and for treatments with manganese sulfate, aeration times between 110 to 240 min and pH between 8.5 to 9.8. The coefficients of multiple determination R2 for the models with catalyst MnO2 and MnSO4 were 97.51% and 95.12% respectively. With the MnSO4 catalyst, higher removal percentages were achieved at a shorter aeration time, compared to the treatments carried out with the MnO2 catalyst.

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9

Hai, Nguyen Thi, and Dinh Thuy Hang. "Treatment of acidic wastewater from thien ke tin processing factory by sulfate reducing bioreactor: a pilot scale study." Vietnam Journal of Biotechnology 14, no. 4 (April 19, 2018): 777–84. http://dx.doi.org/10.15625/1811-4989/14/4/12313.

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A pilot-scale system of a total volume of 6 m3 using sulfate reducing (SR) bioreactor technology was established for the treatment of acidic wastewater from Thien Ke tin processing factory in Tuyen Quang province, Vietnam. In the system, the acidic wastewater with high metal content went first to a collecting tank filled with limestone gravels to increase pH to a value favorable for SRB growth, and at the second step to a SR bioreactor where sulfate reduction occurred to produce sulfide for metal precipitation. To activate the SR bioreactor, a laboratory SRB mixed culture dominated by Desufovibiro, Desulfobulbus and Desulfomicrobium species was added at a cell density of 106 cell/ml so that a full activation was achieved just after a week of incubation. Molasses was added to the SR bioreactor at 0.5 ml/L as substrate for the SRB growth during the operation. The performance of the system was studied under batch and continuous modes. The batch mode showed good results after three day-operation. The pH increased from 2.8 – 3.2 to 7 – 7.2, and a total of 750 mg/L sulfate was reduced to sulfide presumably by the SRB. The produced sulfide efficiently removed metals from the wastewater, such as iron from 143.1 mg/L to 0.3 mg/L, copper from 16.32 mg/L to 0.04 mg/L and manganese from 10.9 mg/L to 0.05 mg/L. The continuous mode with a hydraulic load of 100 l/h and an according retention time of three days showed constitutive contaminant removal. The effluent pH of the system was around 7 within six-day period. The sulfate reduction was active, keeping sulfate concentration in the final effluent as low as  150 mg/L. Accordingly, the three most metal contaminants (iron, copper and manganese) were found at concentrations below the regulated limits. The results showed the possibility of applying SR bioreactor technology for the treatment of AMD is feasible and the use of previously enriched mixed culture of SRB could be a good approach to shorten the activation period of the SR bioreactor.

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Rokosz, Krzysztof, Grzegorz Solecki, Gregor Mori, Rainer Fluch, Marianne Kapp, and Jouko Lahtinen. "Effect of Polishing on Electrochemical Behavior and Passive Layer Composition of Different Stainless Steels." Materials 13, no. 15 (August 1, 2020): 3402. http://dx.doi.org/10.3390/ma13153402.

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In the present paper, the effect of different polishing methods (mechanical and electrochemical) on passive layer chemistry and the corrosion behavior of stainless steels is investigated. It was found that CrNiMo austenites have a substantially better corrosion behavior than CrMnN ones. The nickel is enriched underneath the passive layer, while manganese tends to be enriched in the passive layer. It was also noted that immersion of manganese into an electrolyte preferentially causes its dissolution. It was found that high amounts of chromium (27.4%), molybdenum (3.3%), nickel (29.4%), with the addition of manganese (2.8%) after mechanical grinding, generates a better corrosion resistance than after electrochemical polishing. This is most likely because of the introduction of phosphates and sulfates into its structure, which is known for steels with a high amount of manganese. For highly alloyed CrNiMo steels, which do not contain a high amount of manganese, the addition of phosphates and/or sulphates via the electropolishing process results in a decrease in pitting corrosion resistance, which is also observed for high manganese steels. Electropolished samples show detrimental corrosion properties when compared to mechanically polished samples. This is attributed to substantial amounts of sulfate and phosphate from the electropolishing electrolyte present in the surface of the passive layer.

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Jia, Lixin, Xingwang Pei, and Fei Yang. "Electrolysis-Assisted Mn(II)/Sulfite Process for Organic Contaminant Degradation at Near-Neutral pH." Water 11, no. 8 (August 2, 2019): 1608. http://dx.doi.org/10.3390/w11081608.

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Manganese-catalyzed sulfite activation (i.e., Mn(II)/sulfite) has emerged as an advanced oxidation process to produce sulfate radical (SO4•−) for water treatment. However, to maintain the catalytic activity of Mn(II) ion, solution acidity has to be kept below pH 4, which is difficult to maintain in practice. Moreover, Mn(II)/sulfite reaction is a strongly oxygen-dependent process, and purging air into reaction solution is another extra cost. To solve the above issues, we devised to implement electrolysis into Mn(II)/sulfite (i.e., electro/Mn(II)/sulfite process) for organic compound (bisphenol A, BPA) oxidation. It was revealed that, under near-neutral conditions (pH 6), the removal rate of 10 μM BPA was increased from 46.3%, by Mn(II)/sulfite process, to 94.2% by electro/Mn(II)/sulfite process. The enhancement of BPA removal after implementation of electrolysis to Mn(II)/sulfite process was investigated, and concluded to be a result of several pathways. In detail, the produced oxygen from water electrolysis, direct sulfite oxidation on anode, and local acidic pH at anode vicinity together play a role in promoting SO4•− production and, therefore, contaminant removal. Radical-scavenging assays confirmed the dominant role of SO4•− in electro/Mn(II)/sulfite process.

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Smolikov, M. D., L. I. Bikmetova, K. V. Kazantsev, I. V. Muromtsev, and A. S. Belyi. "The promotion of supported sulfated zirconia catalysts by iron and manganese sulfates." Kataliz v promyshlennosti 21, no. 3 (May 17, 2021): 163–69. http://dx.doi.org/10.18412/1816-0387-2021-3-163-169.

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The study considers the effect of iron and manganese introduction on the textural characteristics and phase composition of the alumina matrix used as a support for sulfated zirconia catalysts in hexane isomerization. The additives introduced during plasticization of aluminum hydroxide essentially enhance the catalytic activity, which is expressed in terms of hexane conversion, and the selectivity of isomerization toward the formation of hexane isomers. The distinctive feature of the doped catalysts is the formation of acid sites with LAS/BAS ≥ 2, which promote an increase in the yield of isomers and particularly the yield of high-octane 2,2-dimethylbutane.

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Powell, N. L. "Spray-Tank-Mix Compatibility of Manganese, Boron, and Fungicide: Solution pH and Precipitation1." Peanut Science 20, no. 1 (January 1, 1993): 44–49. http://dx.doi.org/10.3146/i0095-3679-20-1-12.

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Abstract Foliar application of manganese and boron mixed with pesticides in water solution is a common practice for peanut (Arachis hypogaea L.) production. This study was conducted to determine the compatibility of mixing manganese, boron, and leafspot fungicides using water from three sources. Spray mixtures of the chelated manganese salt of ethylene diamine tetra-acetate and the inorganic salts of manganese as manganese sulfate(TECMANGAMTM), manganese sulfate monohydrate, manganese chloride, and manganese nitrate were developed using deep-well water, shallow well water, or distilled water. Boron was added to these mixtures using boric acid or disodium octaborate tetrahydrate. In addition, all combinations were mixed with the leafspot fungicides chlorothalonil or cupric hydroxide plus sulfur. Mixtures were equivalent to recommended rates of manganese, boron, and fungicide applied to the foliage in 140 L ha-1 of spray volume. Measurements were made of solution pH and manganese remaining in solution after filtration. Development of precipitates was noted. In the deep-well water solution (pH = 8.0), addition of manganese sulfate, manganese sulfate monohydrate and manganese chloride caused precipitates to form. Manganese nitrate and chelated manganese solutions did not form precipitates. Addition of disodium octaborate tetrahydrate increased the tank-mix pH for all waters source, and caused increased precipitation of the manganese inorganic salts, but not the chelated manganese. Use of boric acid in the water lowered solution pH, and all manganese sources remained in solution. Spray-tank-mix pH was critical in keeping all manganese inorganic salts in solution. For all pH levels studied (pH 4.6 to 8.4) the chelated manganese remained in solution without formation of a precipitate. Chemical analyses of the filtrate showed that only 75 to 80% of the inorganic salts of manganese remained in solution with disodium octaborate tetrahydrate, while 100% of the chelated manganese salt remained in solution. Inorganic salts of manganese and disodium octaborate tetrahydrate should not be mixed with chlorothalonil, and none of the manganese materials should be mixed with cupric hydroxide plus sulfur as a spray-tank-mixture for foliar application.

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Bataineh, H., M. H. Al-Hamood, and A. M. Elbetieha. "Assessment of aggression, sexual behavior and fertility in adult male rat following long-term ingestion of four industrial metals salts." Human & Experimental Toxicology 17, no. 10 (October 1998): 570–76. http://dx.doi.org/10.1177/096032719801701008.

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1 The effect of long-term ingestion of the industrial metals salts, manganese sulfate, aluminum chloride, lead acetate and copper chloride was investigated on aggression, sexual behavior and fertility in male rat. Adult male rats ingested solutions of these salts along with drinking water at a concentration of 1000 p.p.m. for 12 weeks. 2 Male rat sexual behavior was suppressed after the ingestion of manganese sulfate, aluminum chloride, lead acetate and copper chloride. The ingestion of solutions of these salts markedly prolonged the intromission and ejaculation latencies. Aluminum chloride and copper chloride reduced the copulatory efficiency. 3 Male rat aggression was also abolished after the ingestion of manganese sulfate, aluminum chloride, lead acetate and copper chloride. The ingestion of solutions of these salts markedly suppressed lateralizations, boxing bouts, fight with stud male and ventral presenting postures. 4 Fertility was reduced in male rats ingested with lead acetate. The total number of resorptions was increased in female rats impregnated by males ingested with manganese sulfate and lead acetate. 5 Body, absolute or relative testes, seminal vesicles weights were dropped in adult male rats ingested with manganese sulfate, aluminum chloride, lead acetate and copper chloride. However, the absolute or relative preputial gland weights were not affected. Collectively, these results suggest that the long-term ingestion of manganese sulfate, aluminum chloride, lead acetate and copper chloride would have adverse effects on sexual behavior, territorial aggression, fertility and the reproductive system of the adult male rat.

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Haifeng, Wang, Chen Xiaoliang, Zhao Pingyuan, Gao Zhaowei, You Xiaoyu, Tian Jiayu, and Wang Jiawei. "Preparation of New Nano-MnO2 and Its Molybdenum Adsorption in Manganese Sulfate Solution." Nanoscience and Nanotechnology Letters 12, no. 9 (September 1, 2020): 1070–78. http://dx.doi.org/10.1166/nnl.2020.3210.

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Manganese sulfate solution was in this study oxidized, using H2O2 as oxidant, to obtain new Nano-MnO2 in situ. The characterization of new MnO2 was carried out by XRD, SEM, FT-IR and BET. The effect of new manganese dioxide adsorpting molybdenum ion in manganese sulfate solution was also studied. Results showed that the main crystal form of the new MnO2 was γ type, and there was agglomeration of nanospheres with 200∼300 nm diameter from the microscopic morphology, which had abundant surface hydroxyl groups, and its specific surface area was as high as 146 m2/g. MnO2 addition was 1.0 g under optimal adsorption conditions when the pH was 2, and the reaction time was 30 min, with removal rate of 99.2% molybdenum and 0.26 ppm residual amount of molybdenum in manganese sulfate solution, which met the quality standard for high purity manganese sulfate (HG/T4823-2015) with ≤5 ppm molybdenum content. Moreover, the thermodynamics and kinetics of molybdenum adsorption by new manganese dioxide were also studied. The experiments showed that the adsorption process was in accordance with the Freundlich adsorption equation. The adsorption process of molybdenum on manganese dioxide could be described with pseudo second order kinetic model, and the internal diffusion was a controlling link of adsorption rate.

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Tarutis, W. J., and R. F. Unz. "Iron and manganese release in coal mine drainage wetland microcosms." Water Science and Technology 32, no. 3 (August 1, 1995): 187–92. http://dx.doi.org/10.2166/wst.1995.0140.

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The primary mechanisms responsible for the removal and retention of iron, manganese, and sulfate in constructed wetlands receiving acidic mine drainage (AMD) include the formation of metal oxides and sulfides within the sediments. This study was initiated to determine the kinetics of metal ion liberation, under reducing conditions, from synthetic and naturally occurring iron and manganese oxides typically found in AMD precipitates. Rates of metal ion liberation were determined during time series incubations of an organic substrate (spent mushroom compost) to which five metal oxides of varying crystallinity (amorphous and crystalline oxides of iron and manganese; natural AMD oxide) were added. All experiments were carried out in silicone-sealed polycarbonate centrifuge tubes incubated at 22°C for a period of 3, 7, 10, 14, 21 or 28 days. Tubes were sacrificed after each incubation period and were analyzed for redox potential, pH, sulfide, and metals. All tubes exhibited reducing potentials within 3 days coupled with rapidly increasing concentrations of iron and manganese. Liberation of iron and manganese decreased with increasing mineral crystallinity (amorphous > natural AMD ≫ crystalline). The results suggest that metal ion liberation from oxide minerals may be an important source of iron and manganese within constructed wetlands receiving AMD.

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Broschat, Timothy K. "Effect of Manganese Source on Manganese Uptake by Pygmy Date Palms." HortScience 26, no. 11 (November 1991): 1389–91. http://dx.doi.org/10.21273/hortsci.26.11.1389.

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Pygmy date palms (Phoenix roebelenii `O'Brien') growing in a pine bark-Canadian peat-sand container medium and in a sandy field soil were fertilized with one of five commercially available Mn sources. Fertilization with Mn sulfate plus ammonium sulfate consistently increased Mn uptake above that of control palms. Four soluble Mn sources were applied to the foliage of container-grown palms, but only Mu sulfate consistently increased Mn concentrations in the leaves. Addition of urea, calcium hydroxide, or dimethylsulfozide did not improve Mn uptake from foliar sprays, and foliar sprays and soil applications were equally rapid in their effects on leaf Mn concentration.

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You, Z., G. Li, Z. Peng, L. Qin, Y. Zhang, and T. Jiang. "Reductive roasting of iron-rich manganese oxide ore with elemental sulfur for selective manganese extraction." Journal of Mining and Metallurgy, Section B: Metallurgy 53, no. 2 (2017): 115–22. http://dx.doi.org/10.2298/jmmb150223008y.

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It is very important to selectively reduce manganese oxide over iron oxide for extraction of Mn from iron-rich manganese ore. In this study, reductive roasting of an iron-rich manganese oxide ore with elemental sulfur as reductant was investigated. The experimental results demonstrated that manganese dioxide can be selectively reduced with elemental sulfur and extracted via acid leaching, which was largely depended on the sulfur addition. Lower sulfur addition (S/Mn molar ratio<1.0) results in higher selectivity, which is independent of roasting temperature. More than 95% manganese and less than 10% iron were extracted through acid leaching under the roasting conditions of 400-600?C with S/Mn molar ratio of 0.6. The contents of manganese sulfide and sulfate in the roasted product increased with increasing sulfur addition, while they decreased distinctly at temperatures above 550?C. The thermodynamic analysis also proved that manganese dioxide is more easily reduced than iron oxide by sulfur at 300-900 K. The phase transformations during reductive roasting revealed that sulfides (MnS and FeS2) were favored at temperatures lower than 550?C whereas the oxides (MnFe2O4 and Fe3O4) were predominant at higher temperatures. The reduction of iron oxide mainly occurred at large sulfur additions (S/Mn>2.0) and the roasting temperature exerted a significant impact on the phase composition of roasted product.

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FU, Jiangang, Zhangxing HE, Hui WANG, Wei LIANG, and Chao GUO. "Preparation of chemical manganese dioxide from manganese sulfate." Mining Science and Technology (China) 20, no. 6 (November 2010): 877–81. http://dx.doi.org/10.1016/s1674-5264(09)60299-4.

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20

Luo, Yao, Yougang Shen, Lihu Liu, Jun Hong, Guohong Qiu, Wenfeng Tan, and Fan Liu. "In situ detection of intermediates from the interaction of dissolved sulfide and manganese oxides with a platinum electrode in aqueous systems." Environmental Chemistry 14, no. 3 (2017): 178. http://dx.doi.org/10.1071/en16204.

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Environmental contextDissolved sulfide results in soil acidification and subsequent contaminant leaching via oxidation processes, usually involving manganese oxides. In this work, redox processes were monitored in situ by cyclic voltammetry and HS– concentrations were semi-quantitatively determined. The method provides qualitative and semi-quantitative assessment for dissolved sulfide and its oxidation intermediates in aqueous systems. AbstractDissolved sulfide can be oxidised by manganese oxides in supergene environments, while the intermediates including S0, S2O32– and SO32– are easily oxidised by oxygen in air, resulting in some experimental errors in conventional analyses. In this work, the electrochemical behaviours of HS–, S2O32– and SO32– on a platinum electrode were studied by cyclic voltammetry and constant potential electrolysis, and in situ detection of the intermediates was conducted in aqueous systems of HS– and manganese oxides. The results showed that HS– was first oxidised to S0, and then transformed to SO42–. The peak current for the oxidation of HS– to S0 had a positive linear correlation with the used starting HS– concentration. S2O32– and SO32– were directly electrochemically oxidised to SO42–. The oxidation current peak potentials at 0, 0.45 and 0.7V were respectively observed for HS–, S2O32– and SO32– at pH 12.0. Cyclic voltammetry was conducted to monitor the redox processes of HS– and manganese oxides. The oxidation peak current of HS– to S0 decreased, and that of S2O32– to SO42– was observed to increase as the reaction proceeded. The rate of the decrease of the oxidation peak current of HS– indicated that the oxidation activity followed the order of birnessite>todorokite>manganite.

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Zhang, Shaobo, Sanfan Wang, Yangyang Zheng, and Han Du. "Pretreatment-Membrane Electrolysis Process for Treatment of Ammonium Sulfate Double Salt Crystals Formed During Electrolytic Manganese Production." Crystals 9, no. 12 (December 11, 2019): 667. http://dx.doi.org/10.3390/cryst9120667.

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Ammonium sulfate double salt crystals (ASDSCs) are a by-product formed during the electrolytic production of manganese. The long-term open-air stacking of ASDSCs leads to the manganese and ammonia nitrogen present inside leaching with rainwater, which seriously damages the ecological environment. To find a reasonable treatment method, we developed a pretreatment-membrane electrolysis method, which allowed for the recycling of ASDSCs stepwise. At the beginning, the ASDSCs were dissolved in water. The Mn2+ and Mg2+ present in the crystals were converted into MnCO3 and MgCO3 and recycled for the production of electrolytic manganese. The filtered liquid (mainly ammonium sulfate) was electrically decomposed to generate ammonia water and sulfuric acid, which were recycled for electrolytic manganese production. The results show that under the optimal conditions of a current density of 300 A/m2—an electrolysis time of 11 h and a temperature of 40 °C—the decomposition rate of ammonium sulfate reached 98.4%. This method led to the complete decomposition and utilization of the ASDSCs and truly achieved the green electrolytic production of manganese.

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Held, Peter, and Ladislav Bohatý. "Manganese(II) sulfate tetrahydrate (ilesite)." Acta Crystallographica Section E Structure Reports Online 58, no. 12 (November 22, 2002): i121—i123. http://dx.doi.org/10.1107/s1600536802020962.

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Chaabouni, S., S. Kamoun, A. Daoud, and T. Jouini. "Manganese Ethylenediammonium Bis(sulfate) Tetrahydrate." Acta Crystallographica Section C Crystal Structure Communications 52, no. 3 (March 15, 1996): 505–6. http://dx.doi.org/10.1107/s0108270195011048.

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Lu, Jing. "Tris(ethylenediamine)manganese(II) sulfate." Acta Crystallographica Section E Structure Reports Online 65, no. 10 (September 9, 2009): m1187. http://dx.doi.org/10.1107/s1600536809034874.

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Codognoto, Luciane da Cunha, Thassiane Telles Conde, Katia Luciene Maltoni, Glaucia Amorim Faria, and Jucilene Cavali. "Effects of glyphosate plus foliar manganese application on the production and quality of marandu grass." Acta Scientiarum. Animal Sciences 43 (April 27, 2021): e52796. http://dx.doi.org/10.4025/actascianimsci.v43i1.52796.

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In this study, the stimulatory effects of application of glyphosate herbicide coupled with manganese sulfate (8%) foliar fertilizer on the production and bromatological characteristics of Brachiaria brizantha ‘Marandu’ were evaluated. The experiments were performed using randomized complete block design with a 5×4 factorial scheme in plots subdivided over time (across four evaluations) with four repetitions, totaling 100 observations. The effects of sublethal doses of acid equivalent (a.e.) of glyphosate (5.40, 21.60, 64.80, and 108.00 g·a.e.·ha-1) and control plus manganese sulfate foliar fertilizer (1,000 g ha-1) were assessed in four successive evaluations at a defoliation frequency of 21 days. Foliage at 20 cm height (to evaluate forage production); leaf/stem ratio (LSR); and contents of crude protein (CP), neutral detergent fiber (NDF), acid detergent fiber (ADF), and lignin (LIG) were measured in experimental plots with a usable area of 7.5 m2. Application of sublethal doses of glyphosate plus manganese sulfate did not increase forage production, increased LSR, reduced LIG content, and did not affect CP content in all four evaluations. NFD and ADF indicated satisfactory qualitative indices for animal feed following the application of sublethal doses of glyphosate plus manganese sulfate in all four evaluations.

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Tkach, E., M. Vakerich, and V. Nikolaychuk. "Action of manganese salt on Triticum aestivum." Visnyk of Dnipropetrovsk University. Biology, medicine 5, no. 2 (July 12, 2014): 121–24. http://dx.doi.org/10.15421/021423.

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Specificneed in manganese is a characteristic feature of all plants. At present time, participation of this element in functioning in a number of processes and structures in the plant organism is proved. Indispensabilityof manganese as a component of plant metabolism is evidenced by death of plants aged 2–4 weeks at absolute exclusion of manganese nutrient medium, and symptoms of disorders at all levels of metabolism due to lack of this element. As opposed to symptoms of deficiency which are specific for every element, the signs of excess are more or less the same. In conditions of gradual increase of the concentration of ions as factors of influence, gradual manifestation of plant organism depression is observed: growth inhibition, root dying and leaf chlorosis, etc. Foliar feeding of grain crops including winter wheat with manganese is very important because they have a great need for such elements as manganese and copper. Efficiencyof the types of foliar feeding is connected with the mechanisms of penetration of manganese into the plant cells. Unlike other metals, manganese can be mobilized by sprouts from seed integument: metal absorption from wheat seeds lasts till the seventh day. That’s why, the aim of our work was to investigate the influence of pre-sowing processing of winter wheat seeds with solutions of different concentrations of manganese sulfate for detection of the optimal concentration and studying of phytotoxic influence of the excess manganese action. Vegetation tests were carried out in the laboratory conditions for performing the studies. Winter wheat seeds were steeped into solutions of manganese sulfate in such concentrations as 0.001%, 0.01%, 0.1%, 0.5% and 1%. After that they were couched in multi-component environment (sod-podzol soil). As a control variant, an experiment without treatment was used. The influence of different concentrations on the growth processes such as seed germination, length of the sprout, weight of the plants and their root system was estimated. It was determined that the optimal concentration of manganese sulfate for the pre-sowing processing was equal to 0.001–0.01%. The critical one, at which the phytotoxic action is manifested in growth depression and decrease of sprout biomass, is the use of 0.5–1.0% solution of manganese sulfate for the pre-sowing seed treatment.

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Retnaningrum, Endah, and Wahyu Wilopo. "Pyrolusite Bioleaching by an Indigenous Acidithiobacillus sp KL3 Isolated from an Indonesian Sulfurous River Sediment." Indonesian Journal of Chemistry 19, no. 3 (May 29, 2019): 712. http://dx.doi.org/10.22146/ijc.38898.

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The manganese bioleaching process of pyrolusite from Kliripan, Indonesia using Acidithiobacillus sp KL3 was investigated. The influence pulp densities of pyrolusite (0.01, 0.02, 0.03 and 0.05 g/cm3) on the bioleaching processes were studied for 16 days. The reduction on pH values, the increasing of oxidation-reduction potential (ORP), sulfate and manganese concentration were analyzed. The manganese bioleaching mechanism of pyrolusite by the strain was monitored using Scanning Electron Microscope-Energy Dispersive-X-ray Spectroscopy (SEM-EDX). The results indicated that 0.02 g/cm3 of pyrolusite was considered to be the optimal pulp density for manganese bioleaching process. During this process, pH values decreased, furthermore resulted in increasing of ORP, the concentration of sulfate and manganese. SEM-EDX analysis clearly showed the evidence of directly bacterial cell attachment into the surface of pyrolusite. Extracellular polymeric substances (EPSs) were further founded on that surface. Sulfur elemental was oxidized by the strain which was then confirmed of resulting in solubilized manganese.

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Turingan, Casey Oliver A., Giulio B. Singson, Bernadette T. Melchor, Richard D. Alorro, Arnel B. Beltran, and Aileen H. Orbecido. "Evaluation of Efficiencies of Locally Available Neutralizing Agents for Passive Treatment of Acid Mine Drainage." Minerals 10, no. 10 (September 24, 2020): 845. http://dx.doi.org/10.3390/min10100845.

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Acid mine drainage (AMD) generated from the mining industry elevates environmental concerns due to the pollution and contamination it causes to bodies of water. Over the years, passive treatment of AMD using alkalinity-generating materials have been widely studied with pH neutralization as its commonly observed mechanism. During the treatment process, heavy metal removal is also promoted by precipitation due to pH change or through adsorption facilitated by the mineral component of the materials. In this study, four materials were used and investigated: (1) a low grade ore (LGO) made up of goethite, calcium oxide, and manganese aluminum oxide (2–3) limestone and concrete aggregates (CA) composed of calcite, and (4) fly ash consisting of quartz, hematite, and magnetite. The performance of each alkalinity-generating agent at varying AMD/media ratios was based on the change in pH, total dissolved solids (TDS), oxidation reduction potential (EH); and heavy metals (Fe, Ni, and Al) removal and sulfate concentration reduction. Concrete aggregate displayed the most significant effect in treating AMD after raising the pH to 12.42 and removing 99% Fe, 99% Ni, 96% Al, and 57% sulfates. Afterwards, the efficiency of CA at various particle sizes were evaluated over 1 h. The smallest range at 2.00–3.35mm was observed to be most effective after 60 min, raising the pH to 6.78 and reducing 94% Fe, 78% Ni, and 92% Al, but only 28% sulfates. Larger particles of CA were able to remove higher amounts of sulfate up to 57%, similar to the jar test. Overall, CA is an effective treatment media for neutralization; however, its performance can be complemented by a second media for heavy metal and sulfate removal.

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Liu, De Li, Jin Ning Cheng, and Jia Jun Han. "Microwave Synthesis of MnO₂/C and its Applications in Zinc-Air Battery." Advanced Materials Research 724-725 (August 2013): 808–12. http://dx.doi.org/10.4028/www.scientific.net/amr.724-725.808.

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MnO2/C composites were synthesized in a microwave oven using the activated carbon as a carrier, manganese sulfate as manganese source, ammonium persulfate as an oxidant, ammonium sulfate as conductive agent. The effects of activated carbon and ammonium sulfate concentration on the MnO2/C composite crystalstructure and assembly of the zinc-air battery were studied. The results show that the mixed crystal MnO2/C has the best catalytic oxygen reduction effect. The reaction changes from chemical reaction to electrochemical reaction because of activated carbon. The power of MnO2/C air battery is increased first and then decreased with the active carbon concentration increased. When the carbon concentration was 30gL-1, the power reaches a maximum value. With the ammonium sulfate concentration increases the battery energy is first increased and then decreased. The power reaches a maximum value as the concentration of ammonium sulfate is 0.25molL-1.

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Alhassan, Fatah H., Umer Rashid, Mothanna Sadiq Al-Qubaisi, Abdullah Rasedee, and Yun H. Taufiq-Yap. "The effect of sulfate contents on the surface properties of iron–manganese doped sulfated zirconia catalysts." Powder Technology 253 (February 2014): 809–13. http://dx.doi.org/10.1016/j.powtec.2013.12.045.

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Lopes, Toni Jefferson, Carlos Roberto de Menezes Peixoto, Adriano Da Silva, Fernanda Arnhold Pagnussatt, Ronan Ribeiro Da Costa Junior, Romulo Gomes Guimarães, and Bruno Trevizan Dos Santos. "ANÁLISE ESTATÍSTICA PARAMÉTRICA DE FATORES DE OPERAÇÃO NO PROCESSO DE FERMENTAÇÃO PARA OBTENÇÃO DE CACHAÇA." Brazilian Journal of Food Research 7, no. 1 (August 29, 2016): 1. http://dx.doi.org/10.3895/rebrapa.v7n1.3443.

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Brazilian sugar cane spirit (cachaça) production is traditional among rural producers in Santo Antônio da Patrulha-RS-Brazil. In this work, in similar conditions used by the producers, the effect of different °Brix and nutrients concentration on sugar cane juice fermentation time and ethanol yield was tested. Sixteen experiments were executed, predicted in a statistical planning, in order to identify the effect of eight factors. The results indicate that the increase on manganese sulfate concentration and cornmeal amount, and also the zinc sulfate concentration increase in interaction effect with higher °Brix, cause increase in fermentation time. It was also observed that the ethanol yield was higher at lower °Brix and at higher triple superphosphate amount in interaction effect with higher °Brix. Ammonium sulfate and copper sulfate concentrations, and also rice bran amount had no significant influence on the process. The best parameters determined, at local conditions, to obtain the lowest fermentation time and higher ethanol yield are the following: 14°Brix, triple superphosphate 0.5 g/L, zinc sulfate 0.5 g/L, manganese sulfate 0.2 g/L, cornmeal 5 g/L. It is also indicated the maintenance of ammonium sulfate 0.5 g/L and rice bran 5 g/L.

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Kushkevych, Ivan, Jorge Castro Sangrador, Dani Dordević, Monika Rozehnalová, Martin Černý, Roman Fafula, Monika Vítězová, and Simon K. M. R. Rittmann. "Evaluation of Physiological Parameters of Intestinal Sulfate-Reducing Bacteria Isolated from Patients Suffering from IBD and Healthy People." Journal of Clinical Medicine 9, no. 6 (June 19, 2020): 1920. http://dx.doi.org/10.3390/jcm9061920.

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Background: Inflammatory bowel diseases (IBDs) are multifactorial illnesses of the intestine, to which microorganisms are contributing. Among the contributing microorganisms, sulfate-reducing bacteria (SRB) are suggested to be involved in the process of bowel inflammation due to the production of hydrogen sulfide (H2S) by dissimilatory sulfate reduction. The aims of our research were to physiologically examine SRB in fecal samples of patients with IBD and a control group, their identification, the study of the process of dissimilatory sulfate reduction (sulfate consumption and H2S production) and biomass accumulation. Determination of biogenic elements of the SRB and evaluation of obtained parameters by using statistical methods were also included in the research. The material for the research consisted of 14 fecal samples, which was obtained from patients and control subjects. Methods: Microscopic techniques, microbiological, biochemical, biophysical methods and statistical analysis were included. Results: Colonies of SRB were isolated from all the fecal samples, and subsequently, 35 strains were obtained. Vibrio-shaped cells stained Gram-negative were dominant in all purified studied strains. All strains had a high percentage of similarity by the 16S rRNA gene with deposited sequences in GenBank of Desulfovibrio vulgaris. Cluster analysis of sulfate reduction parameters allowed the grouping of SRB strains. Significant (p < 0.05) differences were not observed between healthy individuals and patients with IBD with regard to sulfate reduction parameters (sulfate consumption, H2S and biomass accumulation). Moreover, we found that manganese and iron contents in the cell extracts are higher among healthy individuals in comparison to unhealthy individuals that have an intestinal bowel disease, especially ulcerative colitis. Conclusions: The observations obtained from studying SRB emphasize differences in the intestinal microbial processes of healthy and unhealthy people.

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Hincapie, Beatriz, Sandra M. Llano, Hector F. Garces, Diego Espinal, Steven L. Suib, and Luis J. Garces. "Epoxidation of cyclopentene by a low cost and environmentally friendly bicarbonate/peroxide/manganese system." Adsorption Science & Technology 36, no. 1-2 (April 25, 2017): 9–22. http://dx.doi.org/10.1177/0263617417701744.

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The system hydrogen peroxide/sodium bicarbonate/manganese sulfate was used for the first time to epoxidize cyclopentene. Effects of parameters such as type and amount of solvent, ratio of hydrogen peroxide and manganese sulfate to cyclopentene, presence of additives, and reaction time and temperature on the selectivity to cyclopentene oxide were evaluated. Gas chromatography was used to quantify residual cyclopentene and produced cyclopentene oxide using the internal standard method. Type and amount of solvent, addition method, and temperature were important factors to increase the selectivity to cyclopentene oxide. Unlike previous reports on epoxidation of different substrates, additives like sodium acetate and salicylic acid did not improve the selectivity to cyclopentene oxide. One time, single-step addition of hydrogen peroxide/sodium bicarbonate to the solution of cyclopentene/solvent/manganese sulfate produced more cyclopentene oxide than stepwise addition. The maximum selectivity obtained was 56%, possibly due to the high reactivity of cyclopentene that causes the formation of oxidation products different to cyclopentene oxide, which were not detected in the analyzed phase.

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Vlassopoulos, Dimitri, Masakazu Kanematsu, Elizabeth A. Henry, Jessica Goin, Alexander Leven, David Glaser, Steven S. Brown, and Peggy A. O'Day. "Manganese(iv) oxide amendments reduce methylmercury concentrations in sediment porewater." Environmental Science: Processes & Impacts 20, no. 12 (2018): 1746–60. http://dx.doi.org/10.1039/c7em00583k.

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Kropyvka, Yu G., and V. S. Bomko. "THE INDICES OF MILK QUALITY, REPRODUCTION, BLOOD AND RUMEN LIQUID IN HIGHLY PRODUCTIVE COWS IN THE FIRST PERIOD OF LACTATION FOR FEEDING OF MIXED-LIGANDE COMPLEXES OF ZINC, MANGANESE AND COBALT." Scientific and Technical Bulletin оf State Scientific Research Control Institute of Veterinary Medical Products and Fodder Additives аnd Institute of Animal Biology 21, no. 1 (June 1, 2020): 105–12. http://dx.doi.org/10.36359/scivp.2020-21-1.12.

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The article presents data on milk productivity, reproductive function and chemical composition of milk, as well as hematological parameters of blood and rumen liquid in high-yielding Holstein cows of German selection, Ukrainian black-spotted dairy and Ukrainian red-spotted dairy breeds in the first lactation period for feeding them different doses of mixed-ligand complexes of Zinc, Manganese and Cobalt. It is established that the use of mixed-ligand complexes of Zinc, Manganese and Cobalt in the feed mixture in comparison with their sulfates has a positive effect on milk productivity and reproductive function of cows and the chemical composition of their milk, and feed costs decrease with increasing productivity. The use of different forms and levels of Zinc, Manganese and Cobalt in the diets of experimental cows affected protein and carbohydrate-fat metabolism and the best results were obtained when using different levels of these trace elements in the feed due to their mixed-ligand complexes. In the rumen liquid of experimental cows, the pH value increased in the alkaline direction and the difference to the control group was statistically significant. There was also a tendency to increase residual nitrogen compared to control. There was a significant difference in the reduction of ammonia nitrogen in the rumen liquid of cows of experimental groups, which indicates better use and assimilation of crude protein. The best indicators of milk productivity, chemical composition of milk, reproductive function, blood and rumen liquid were obtained when using mixed-ligand complexes of Zinc, Manganese and Cobalt in the feed mixture when the concentration of these trace elements in 1 kg of DM was, mg: Zinc – 60.8; Manganese – 60.8; Cobalt – 0.78; Selenium – 0.3; Copper – 12 and Iodine – 1.1. This concentration of trace elements was achieved due to their mixed-ligandent complexes, copper – its sulfate, iodine – potassium iodide, selenium – selenium suplex.

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Kropyvka, Yu, V. Bomko, and S. Babenko. "The Influence of feeding mixed ligand complexes of zinc, manganese and cobalt on cow productivity, feed digestivity and nitrogene exchange in the final period of lactation." Tehnologìâ virobnictva ì pererobki produktìv tvarinnictva, no. 1(164) (May 25, 2021): 34–41. http://dx.doi.org/10.33245/2310-9289-2021-164-1-34-41.

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The effectiveness of the use of mixed ligand complexes of Zinc, Manganese and Cobalt in the diets of high-yielding cows in the final period of lactation, and their effect on productivity, nutrients digestibility and nitrogen metabolism in the animals’ body was studied in a scientific economic experiment conducted at the Terezyne Ltd. of Bila Tserkva district, Kyiv region. Five groups of highly productive cows of Holstein, Ukrainian red-spotted and Ukrainian black-spotted dairy breeds were selected on the principle of analogues. The difference in feeding cows of the groups was in the following: - the diet of the control 1st group was balanced to the norm only with trace elements of Selenium, Copper and Iodine. - cows of the 2nd and 3d experimental group were fed with the norm of all trace elements (for the 2nd experimental groupthe norm was provided due to introducing sulfates of Zinc, Manganese, Cobalt, Copper, Selenium Suplex and Potassium iodide; for the 3d experimental group , sulfates of Zinc, Manganese and Cobalt were substituted with their mixed ligand complexes). - for cows of 4th experimental group, the concentration of Zinc, Manganese and Cobalt in 1 kg of dry matter feed was reduced by 11% compared to the group 3. - for the 5thgroup it was 22% lower than in the group 3. The results of the studies show that the use different doses of mixed ligand complexes of Zinc, Manganese, Cobalt in cows feeding with the use of Selenium Suplex, Copper sulfate and Potassium iodide during the final 100 days of lactation did not affect milk productivity. Each cow of the control group in the final period of lactation yielded 2220 kg of natural milk, whereas the cows of the experimental groups 2-5 yielded 40-120 kg more. The difference in the average daily milk yield of 4% fat was 0.5–1.91 kg, and this difference was significant (p <0.001). The results of the balance experiment show that the experimental groups animals digested feed nutrients and absorbed Nitrogen better. Nitrogen was deposited in the body of cows of experimental groups 2, 3, 4 and 5 by 2.1 g, 4.1, 7.3 and 12.8 g, respectively (p <0.05) in comparison with the control group, which provided milk productivity increase and reduce the need for these elements.The use of mixed ligand complexes of Zinc, Manganese and Cobalt contributes to milk productivity increase through reducing feed costs per 1 kg of product and reduces the need for these elements. The best performance results were obtained in the experimental group 5, where the animals were fed with the feed containing 1 kg of dry matter, mg: Zinc 35, Manganese 35; Cobalt 0.4; Selenium 0.3; Copper 9 and Iodine 0.8. Key words: cows, Zinc, Manganese, Cobalt, Copper, Selenium Suplex, Potassium iodide, mixed ligand complexes, Nitrogen balance.

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Osowiecki, Wojciech T., Stafford W. Sheehan, Karin J. Young, Alec C. Durrell, Brandon Q. Mercado, and Gary W. Brudvig. "Surfactant-mediated electrodeposition of a water-oxidizing manganese oxide." Dalton Transactions 44, no. 38 (2015): 16873–81. http://dx.doi.org/10.1039/c5dt02390d.

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Al-Maali, G. A., N. A. Bisko, and A. M. Ostapchuk. "The effect of citrate and sulfate of different metals on carbohydrates composition of medicinal mushroom Trametes versicolor (Polyporales, Polyporaceae)." Visnyk of Dnipropetrovsk University. Biology, medicine 7, no. 1 (March 9, 2016): 32–36. http://dx.doi.org/10.15421/021606.

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The aim of our research was to study the influence of citrate and sulfate of copper, manganese and zinc on the carbohydrates composition of biomass of the medicinal mushroom Trametes versicolor (L.) Lloyd. cultivated in a liquid medium. The studied strain of Trametes versicolor 353 was obtained from the Culture Collection of Mushrooms (IBK) from the M. G. Kholodny Institute of Botany, National Academy of Sciences of Ukraine. Citrates of copper, manganese and zinc were obtained from the Institute of Nanobiotechnologies and Resource Conservation of Ukraine, Kyiv. In this study we used glucose-peptone-yeast extract medium (GPY) with the following composition of (g/L): glucose – 25, peptone – 3, yeast extract – 3, K2HPO4 – 1, KH2PO4 – 1, MgSO4 ∙ 7H2O – 0.25, distilled water – 1,000 ml; pH 6,5 (control medium). Cu2+ (sulfate form or citrate form) were added to control medium in concentration 4 mg/L, Zn2+ and Mn2+ (sulfate form or citrate form) were added to control medium in concentration 1 mg/L. Mycelium was grown in a submerged culture on a rotary shaker (120 rpm) at 26 °C in 250 ml Erlenmeyer flasks, containing 50 ml of liquid medium. The biomass was harvested after 9 days of cultivation in the liquid medium. Monosaccharides and sugar alcohols was analyzed by high-performance liquid chromatography Agilent 1200 (Agilent technologies, USA). The results of our research demonstrated that the fraction of total carbohydrates from T. versicolor 353, which were cultivated on the control medium, consists of glucose (91.5%), galactose (1.9%), mannose (5.4%), fucose (0.6%) and xylose (0.7%). The adding of sulfate of zinc or copper to the liquid medium didn’t change the content of monosaccharides of T. versicolor 353 biomass relative to the control medium. At the same time, in the medium with citrate of zinc the amount of glucose increased and the amount of mannose decreased relative to the control medium. Xylose and fucose were not detected in this case. In mycelium of T. versicolor 353 that was cultivated in the medium with manganese sulfate or manganese citrate we detected a small amount of ribose. But the content of other monosaccharides didn’t change in the medium with sulfate of manganese. At the same time, the addition of citrate of manganese to the medium raised the amount of mannose and reduced the amount of glucose in the biomass of T. versicolor 353 relative to the control medium. Also copper citrate reduced the content of glucose in mycelium of T. versicolor 353 relative to the control medium. But in this case we detected mannitol and sorbitol in the biomass. This data indicates that synthesis of sugur alcohols in T. versicolor 353 depend on copper ions in bioactive forms of citrate.

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Reyes Gaige, Andres, Bruce Rowe, and Vatren Jurin. "Assessment of Efficiency of Nutrient Uptake of Different Sources of Zn, Mn, Cu and B in Zea mays." Agriculture 10, no. 6 (June 26, 2020): 247. http://dx.doi.org/10.3390/agriculture10060247.

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Advances in plant nutrition can be achieved by improving the delivery of micronutrients to the plants. The objective of this research was to compare the efficiency of uptake of different sources of zinc, copper and manganese (sulfates, Ethylenediaminetetraacetic acid (EDTA) and oxides) and boron (boric anhydride and colemanite). We conducted all experiments in maize, repeated the experiment twice, using five replicates per treatment, and used two different media. Results showed that for cations, the soluble sources of micronutrients (sulfate and EDTA) in both media were more efficiently taken up. One-way ANOVA with post hoc Tukey for multiple comparisons of means (95% confidence level) was used for all statistical analyses. Sulfate sources were significantly different when compared to the negative control and to the oxide sources. EDTA sources were significantly different when compared to the negative control and to the oxide sources. Oxide sources were not significantly different from the negative control. For boron, we found a similar trend, with boric anhydride being significantly different when compared to the negative control and to colemanite. Colemanite was significantly different when compared to the negative control. This study generated important information about uptake of soluble and insoluble sources of four micronutrients that can be used for the development of new formulations.

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NISHIMURA, Tadahisa, and Yoshiaki UMETSU. "Manganese Dioxide Particles Produced by Ozonation in Acidic Manganese Sulfate Solutions." Shigen-to-Sozai 107, no. 11 (1991): 805–10. http://dx.doi.org/10.2473/shigentosozai.107.805.

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Xu, Long Jun, Xing Min Wang, Hong Chong Chen, and Cheng Lun Liu. "Mn Forms and Environmental Impact of Electrolytic Manganese Residue." Advanced Materials Research 183-185 (January 2011): 570–74. http://dx.doi.org/10.4028/www.scientific.net/amr.183-185.570.

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Mn Forms and the effect on environment of electrolytic manganese residue (EMR) in Chongqing have been investigated through water extracting and sulpharic acid leaching. The ways of comprehensive utilization on EMR has been discussed in this research. The results show that the forms of Mn in EMR are chiefly water soluble Mn (II), the manganese carbonate and manganese dioxide. The groundwater pollution and the eco-environment damage will present if the EMR is randomly stacked and thrown. Having appropriate methods, the EMR may be used as recovery manganese (e.g. manganese sulfate and producing Fe-Mn bimetal oxide). The second residue from EMR can prepare water disposal agent.

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Makhanbetov, A., A. Zharmenov, A. Bayeshov, B. Mishra, and O. Baigenzhenov. "Production of electrolytic manganese from sulfate solutions." Russian Journal of Non-Ferrous Metals 56, no. 6 (November 2015): 606–10. http://dx.doi.org/10.3103/s1067821215060061.

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Won, ll An, and Kyung Nam Kim. "Ceramics using manganese sulfate (MnSO4 · 4H2O) fusion." KOREA SCIENCE & ART FORUM 31 (December 31, 2017): 249–58. http://dx.doi.org/10.17548/ksaf.2017.12.30.249.

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Sikora, J., and J. Zeromski. "The Effect of Nickel Compounds on Mitogen Dependent Human Lymphocyte Stimulation." International Journal of Immunopathology and Pharmacology 8, no. 2 (May 1995): 79–85. http://dx.doi.org/10.1177/039463209500800202.

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The effect of metal salts, three nickel and one non-nickel (manganese chloride), was examined on the ability to influence mitogen stimulated normal human blood lymphocytes by means of short term in vitro culture and a tritiated thymidine incorporation test. Purified lymphocytes were incubated for one hour with tissue culture medium containing either one of the nickel salts tested (nickel subsulfide, nickel sulfate or nickel acetate) or manganese chloride. Separate portions of cells were incubated in the metal salt mixtures containing both, nickel and manganese salts. All metal salts were used in predetermined subtoxic concentrations. Two mitogens, phytohemagglutinin (PHA) and concanavalin A (Con A), were used as lymphocyte stimulatory agents. Cells were cultured for 72 hrs. It was found that following incubation with nickel salts, mitogen dependent lymphocyte stimulation was inhibited proportionally to the metal salt concentration. This blocking effect on tritiated thymidine incorporation was stronger for readily soluble nickel salts i.e. sulfate and acetate than for almost insoluble nickel subsulfide with either mitogen used. Manganese chloride used as a single salt resulted in a dose-dependent increase of lymphocyte stimulation as compared to the mitogen stimulated cells without preincubation with either metal (control samples). Cells preincubated with nickel salt-manganese chloride mixtures exhibited an increase of thymidine incorporation but below values for control cells.

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Papadakis, Ioannis E., Thomas E. Sotiropoulos, and Ioannis N. Therios. "Mobility of Iron and Manganese within Two Citrus Genotypes after Foliar Applications of Iron Sulfate and Manganese Sulfate." Journal of Plant Nutrition 30, no. 9 (September 3, 2007): 1385–96. http://dx.doi.org/10.1080/01904160701555754.

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Wilhelm, NS, RD Graham, and AD Rovira. "Application of different sources of manganese sulfate decreases take-all (Gaeumannomyces graminis var. tritici) of wheat grown in a manganese deficient soi." Australian Journal of Agricultural Research 39, no. 1 (1988): 1. http://dx.doi.org/10.1071/ar9880001.

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Two experiments tested the effectiveness of manganese (Mn) decreasing take-all of wheat. The first experiment was conducted under controlled environmental conditions. Mn sulfate was mixed through the soil at sowing or 2 weeks before, or applied to the seed or leaves, and manganese dioxide (MnO2) was mixed through the soil at sowing or 2 weeks before. Mixing manganese sulfate (MnSO4) through the soil was the most effective treatment at decreasing take-all, followed by seed applied Mn. MnO2 and foliar applied Mn had little effect on take-all. All Mn treatments, except foliar Mn, completely eliminated Mn deficiency in the plants. In the second experiment, which was conducted in the field at a Mn deficient site, Mn sulfate and MnO2 were applied to the soil at sowing. MnSO4 decreased take-all and increased grain yields in take-all inoculated plots nearly threefold, but increased yields only slightly in uninoculated plots. MnO2 was not effective in decreasing take-all or increasing grain yield. This is the first report of take-all infection being suppressed by MnSO4in the field. The results of these experiments support the hypothesis that Mn may be acting through the physiology of the wheat plant to decrease take-all.

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Zhang, Shaobo, Sanfan Wang, Qianqian Zhang, Yanhong Li, Yue Xing, and Guangyi Ren. "Reuse of ammonium sulfate double salt crystals formed during electrolytic manganese production." Water Science and Technology 82, no. 4 (August 10, 2020): 615–26. http://dx.doi.org/10.2166/wst.2020.374.

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Abstract Ammonium sulfate double salt crystals (ASDSCs) are formed during the electrolytic production of manganese. Typically, the large volume of ASDSCs accumulates in the open air, and this leads to serious environmental pollution and wastage of resources. In this study, we developed a new double-membrane three-chamber electrolysis method. In this method, ASDSCs were dissolved in water and then pretreated stepwise to precipitate manganese(II) carbonate and magnesium carbonate. These precipitates were filtered and the filtrate (mainly ammonium sulfate) was subjected to double-membrane three-chamber electrodecomposition to produce sulfuric acid and ammonia. Further investigations showed that under the optimal conditions of current density of 250 A/m2, electrolysis time of 18 h, and temperature of 40 °C, the decomposition rate of ammonium sulfate reached as high as 96.15%. Thus, using this method, ASDSCs can be completely decomposed, which resolves the problem of environmental pollution and provides certain economic benefits to enterprises.

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Pedri, Z. C., L. M. S. Lozano, K. L. Hermann, C. V. Helm, R. M. Peralta, and L. B. B. Tavares. "Influence of nitrogen sources on the enzymatic activity and grown by Lentinula edodes in biomass Eucalyptus benthamii." Brazilian Journal of Biology 75, no. 4 (November 10, 2015): 940–47. http://dx.doi.org/10.1590/1519-6984.03214.

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Abstract Lignocellulose is the most abundant environmental component and a renewable organic resource in soil. There are some filamentous fungi which developed the ability to break down and use cellulose, hemicellulose and lignin as an energy source. The objective of this research was to analyze the effect of three nitrogen resources (ammonium sulfate, saltpetre, soybean) in the holocellulolitic activity of Lentinula edodes EF 50 using as substrate sawdust E. benthamii. An experimental design mixture was applied with repetition in the central point consisting of seven treatments (T) of equal concentrations of nitrogen in ammonium sulfate, potassium nitrate and soybean. The enzymatic activity of avicelase, carboxymetilcellulase, β-glucosidase, xylanases and manganese peroxidase was determined. The humidity, pH, water activity (aw) and qualitative analysis of mycelial growth in 8 times of cultivation were evaluated. The results showed negative effect on enzyme production in treatments with maximum concentration of ammonium sulfate and potassium nitrate. The treatments with cooked soybean flour expressed higher enzymatic activities in times of 3, 6 and 9 days of culture, except in the activity of manganese peroxidase. The highest production was observed in the treatment with ammonium sulfate, and soybean (83.86 UI.L–1) at 20 days of cultivation.

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Kauppinen, Toni, Tuomas Vielma, Justin Salminen, and Ulla Lassi. "Selective Recovery of Manganese from Anode Sludge Residue by Reductive Leaching." ChemEngineering 4, no. 2 (June 17, 2020): 40. http://dx.doi.org/10.3390/chemengineering4020040.

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Manganese-containing anode sludge is a common side-product in the electrowinning of zinc. The anode sludge consists mainly of oxidized manganese, but also lesser amounts of lead, calcium, and other minor metals. The impurities present in the anode sludge mandate new recycling strategies for its efficient use. This work demonstrates a novel method for selective manganese recovery from lead- and calcium-bearing manganese oxide solid residue. Leaching with sulfuric acid in the presence of a selected reducing agent, such as hydrogen peroxide or citric acid, yields a concentrated MnSO4 solution with high selectivity over calcium and lead. Manganese yields up to 98% can be obtained. Minimization of calcium and lead in final manganese product can be accomplished with the correct choice of leaching conditions. Alongside manganese sulfate solution, leaching residue with high content of lead and silver was also formed.

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Long, Yun Fei, Jing Su, Xian Jia Ye, Hai Feng Su, and Yan Xuan Wen. "Reduction-Roast Leaching of Low-Grade Pyrolusite Using Bagasse as a Reducing Agent." Advanced Materials Research 699 (May 2013): 28–33. http://dx.doi.org/10.4028/www.scientific.net/amr.699.28.

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Bagasse, a fibrous residue from sugarcane juice extraction, was used as a reducing agent to roast low-grade pyrolusite in N2. The roasted ore was further leached using sulfuric acid, to convert manganese oxide in the ore to manganese sulfate. The effects of weight ratio of bagasse to manganese ore, roasting temperature, roasting time, leaching temperature, leaching time, stirring speed and sulfuric acid concentration on the leaching recovery of manganese were investigated. Optimal conditions were determined to be a bagasse to manganese ore weight ratio of 0.8:10, roasting temperature of 500°C for 40 min, leaching stirring speed of 100 rpm, sulfuric acid concentration of 3 mol•L-1 and leaching temperature of 50°C for 40 min. The leaching recovery rate of manganese was up to 97.8% at the optimal conditions.

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Journal articles on the topic 'Sulfate de manganèse'

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