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Journal articles on the topic 'Acidic KMnO4'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Sneha, G. Nair, S. More Tushar, and R. Jadhav Vikram. "A Procedure Employing for Redox Titration: Balancing the Redox Chemical Equation in Acidic or Basic Medium." International Journal of Research and Review 7, no. 5 (2020): 99–102. https://doi.org/10.5281/zenodo.3938452.

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Graduate and post graduate students find much more difficulty during the concept of the balancing redox chemical equation in acidic or basic medium. Teachers are well aware of the importance of the balancing redox chemical equation in both medium and also teaching difficulty associated with it. In an attempt to improving the understanding of the balancing the redox chemical equation with reduced difficulty, a mathematical approach that provides easier understanding has been developed and successfully employed in graduate and post graduate students. In this study, relation between an oxidising

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2

Ding, Ruyue, Chao Liu, and Fencun Xie. "The combination of KMnO4 with HMO for cyclic adsorption of heavy metal ions and regeneration of adsorbents." Water Science and Technology 83, no. 8 (2021): 1987–2000. http://dx.doi.org/10.2166/wst.2021.108.

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Abstract In this experiment, three kinds of hydrous manganese dioxide (HMO) with different Zeta potentials were synthesized, and combined with KMnO4 for deep removal of Pb2+, Cd2+ and Ni2+. The competitive adsorption of three heavy metal ions was also investigated. The results indicated that the stronger the acidity, the higher the Zeta potential (-54.3) of the synthesized HMO. After regenerating HMO with acidic KMnO4 as eluent, the removal rates of Pb2+, Cd2+ and Ni2+ could still reach 79.25%, 80.13% and 60.43% after five cycles of adsorption. The promoting mechanism of KMnO4's effect on HMO

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3

Vivian, Fabio, and Carlos Renato Zacharias. "KMnO4 chemical kinetics in high diluted solvents." International Journal of High Dilution Research - ISSN 1982-6206 13, no. 47 (2021): 88. http://dx.doi.org/10.51910/ijhdr.v13i47.738.

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Background: A number of theoretical and experimental approaches have been signalizing towards a induction of some solvent structural order or dynamical behavior, whenever a High Dilution (HD) is prepared. These works have been performed using different spectroscopic techniques, calorimetric studies, electrical and optical measurements, among others, which results are interpreted under many different approaches. The understanding of the physicochemical nature of HDs is still far from to be clarified, despite the evidences on their biological activity. Assuming that physicochemical changes induc

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Singh, Pratibha, Nupoor Srivastava, and R. S. Jagadish. "Toxicity Removal of Pulp and Paper Mill Effluent by Employing Chemicals." IRA-International Journal of Applied Sciences (ISSN 2455-4499) 6, no. 2 (2017): 62. http://dx.doi.org/10.21013/jas.v6.n2.p5.

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<em>Pulp and paper are manufactured from raw materials containing cellulose fibers, generally wood, recycled paper, and agricultural residues. In developing countries, about 60% of cellulose fibers originate from nonwood raw materials such as bagasse (sugar cane fibers), cereal straw, bamboo, reeds, esparto grass, jute, flax, and sisal. Large amount of toxic effluent is released during process of paper production. Pulp and paper mill spent wash (raw effluent) is highly acidic in nature with high BOD, COD, TDS, TSS, phenol, sulphate, nitrogen, phosphorus, potassium and metals viz. Mn Zn C

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Savita, Pataila, Jain Bhawana, Sheel Thool Gautam, Kumar Singh Ajaya, and K. Sharma Pradeep. "Oxidative degradation of metronidazole by acidic potassium permanganate : A spectrophotometric kinetic study." Journal of Indian Chemical Society Vol. 94, Aug 2017 (2017): 897–904. https://doi.org/10.5281/zenodo.5597190.

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Department of Chemistry, Govt. V.Y.T. P.G. Autonomous College, Durg-491 001, Chhattisgarh, India <em>E-mail</em> : ajayaksingh_au@yahoo.co.in Department of Chemistry, J. N. V. University, Jodhpur-342 005, Rajasthan, India <em>E-mail</em> : drpkvs27@yahoo.com <em>Manuscript received online 31 May 2017, accepted 08 June 2017</em> The kinetics of oxidation of metronidazole (MTZ) by acidic KMnO<sub>4 </sub>has been studied spectrophotometrically. The stoichiometry of reaction is found to be 5 : 2 ratio the main oxidation product were identified as 2-methyl-5-nitro-1-imidazole ethanol. The reaction

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6

Chayaprasert, Wilailack, and Kanokporn Sompornpailin. "Newly Established Method for Analyzing the Natural Ethylene Indicators Dissolved in Water Immersed Plant Using Acidified Potassium Manganate." Applied Mechanics and Materials 891 (May 2019): 9–13. http://dx.doi.org/10.4028/www.scientific.net/amm.891.9.

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Ethylene is a plant growth regulator (PGR) that mainly influences on growth and development of plant and their agricultural productivity. Ethylene producing from plant tissue is a physiological indicator which refers to the maturity, senescence, or stress of plants. Therefore, a monitoring level of ethylene in plant tissue is necessary for research and commercial processes. Current method measuring gaseous ethylene is costly and take a long time. This research established a new method to quantify ethylene gas in water immersed plant by using an oxidation reaction between oxidizing agent (KMnO4

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7

Zhang, Shi Lei, Ben Niu, Enlei Qi, Lei Wang, and Jie Qiang Wang. "Morphology Control of the Nano-MnO₂ by Microwave Hydrothermal Synthesis." Advanced Materials Research 624 (December 2012): 47–50. http://dx.doi.org/10.4028/www.scientific.net/amr.624.47.

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In this paper, KMnO4 was used as raw material, nano-MnO2 with different morphologies such as flowers globular, hollow tubular and rodlike were obtained by the microwave assisted hydrothermal synthesis under the acidic condition. The crystal structure and morphology of the resultant MnO2 were characterized by X-ray Diffraction (XRD) and Scanning Electron Microscope (SEM), respectively. The elements and content of samples were tested by Energy Dispersive Spectrometer (EDS). The influence of reaction temperature and holding time on crystal forms and morphologies of the MnO2 was analyzed.

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8

M. Thalj Aljuboury, Eesa. "Spectrophotomitric Determination of Paracetamol by using either Vaniline or KMnO4 oxidizing agents." Tikrit Journal of Pharmaceutical Sciences 12, no. 2 (2023): 112–19. http://dx.doi.org/10.25130/tjphs.2017.12.2.12.112.119.

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Two simple and sensitive Vis spectrophotometric methods were developed for the determinationof paracetamol and compared with the specific and rapid UV spectrophotometric method at243nm for the simultaneous quantification in standard solutions and tablets. The first methodinvolves determination of paracetamol by using a vanaline as a reagent in the presence of 1MHCl to produce a stable yellow- orange color Schiff base absorbs at 392 nm after fraction of itby 4M H2SO4.The second method involves using alkaline potassium permanganate as anoxidizing agent produucing a stable blue-green color absorb

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9

Huang, Ying, Yan Xiong, Zhong Bin Ye, and Zhu Jun Zhang. "Molecularly Imprinted Polymer-Chemiluminescence Sensor Detect Phentolamine in Urine Sample." Advanced Materials Research 554-556 (July 2012): 1841–44. http://dx.doi.org/10.4028/www.scientific.net/amr.554-556.1841.

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Using methacrylic acid (MAA) as monomer, ethylene glycol dimethacrylate (EGDMA) as cross-linker and phentolamine as template molecule, we synthesized phentolamine–molecularly imprinted polymers (MIP). Using phentolamine–MIP as molecule recognizates, based on the oxidation reaction between KMnO4 and phenolamine in acidic, we set up a flow-injection chemiluminescence (FI-CL) sensor for phentolamine determination. The sensor was fabricated by packing the MIP particles into a V-shape flow cell. Phentolamine could be selectively on-line adsorbed by the MIPs and then sensed by the oxidation reaction

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10

Konidala, Sathish Kumar. "Spectrophotometric Determination of Eprosartan Based on Oxidation by Acidic KMnO4 in Bulk and Dosage Form." Analytical Chemistry Letters 7, no. 1 (2017): 120–27. http://dx.doi.org/10.1080/22297928.2017.1279984.

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11

Hassan, Ali, and Theodore Tzedakis. "Facile chemical activation of graphite felt by KMnO4 acidic solution for vanadium redox flow batteries." Applied Surface Science 528 (October 2020): 146808. http://dx.doi.org/10.1016/j.apsusc.2020.146808.

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12

P., Sindhu *. Ch. Sridhar G. Jasmine Henna Grace A. Raja Kumar U. Ashok G. Naveen. "VISIBLE SPECTROSCOPIC ESTIMATION AND VALIDATION OF MIDODRINE HYDROCHLORIDE IN BULK AND PHARMACEUTICAL DOSAGE FORMS BY USING KMnO4." Journal of Pharma Research 8, no. 5 (2019): 370–72. https://doi.org/10.5281/zenodo.3236731.

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<strong><em>ABSTRACT</em></strong> <strong><em>A</em></strong><em> simple, sensitive, accurate visible spectroscopic method has been developed for the quantitative estimation of Midodrine hydrochloride in bulk and pharmaceutical dosage forms. The method was mainly based on the formation of violet colour chromogen with potassium permangate in acidic condition or medium. The produced colour was measured at wavelength maximum of 570 nm against reagent blank. The proposed method was showing linearity in the concentration range of 1-5 µg/mL. The developed method was validated statistically fo

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13

Li, Bing, Qilei Yang, Yue Peng, et al. "Enhanced low-temperature activity of LaMnO3 for toluene oxidation: The effect of treatment with an acidic KMnO4." Chemical Engineering Journal 366 (June 2019): 92–99. http://dx.doi.org/10.1016/j.cej.2019.01.139.

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14

Khokhotva, Oleksandr, and Liudmyla Butchenko. "INVESTIGATION OF PHENOL SORPTION REMOVAL PROCESS BY COMPOSITE SORBENT F300-MnO2." Bulletin of the National Technical University «KhPI» Series: New solutions in modern technologies, no. 1(11) (May 18, 2022): 64–68. http://dx.doi.org/10.20998/2413-4295.2022.01.10.

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Phenolic compounds are widespread wastewater pollutants that are produced in the oil and petrochemical industry, coal conversion, and phenol production. Phenols are widely used for the commercial production of a wide variety of plastics, which are used as structural materials for automobiles and equipment, at production of epoxy resins and adhesives. The discharge of phenol-containing waters into water bodies and watercourses sharply worsens their general sanitary status, affecting living organisms not only by their toxicity but also by a significant change in the regime of biogenic elements a

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15

Böhme, Thomas, Mari Egeland, Marianne Lorentzen, et al. "Regiospecific Photochemical Synthesis of Methylchrysenes." Molecules 28, no. 1 (2022): 237. http://dx.doi.org/10.3390/molecules28010237.

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Methylated polycyclic aromatic hydrocarbons (PAHs) are suspected to be some of the toxic compounds in crude oil towards marine life and are needed as single compounds for environmental studies. 1-, 3- and 6-methylchrysene (3a,b,c) were prepared as single isomers by photochemical cyclization of the corresponding stilbenoids in the Mallory reaction using stoichiometric amounts of iodine in 82-88% yield. 2-methylchrysene (3d) was prepared by photochemical cyclization where the regioselectivity was controlled by elimination of an ortho-methoxy group under acidic oxygen free conditions in 72% yield

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16

Matejik, Daniel, Robert Olejnik, Petr Slobodian, and Petr Saha. "Improved Selectivity of Oxidized Multiwall Carbon Nanotube Network for Detection of Ethanol Vapor." Key Engineering Materials 495 (November 2011): 83–86. http://dx.doi.org/10.4028/www.scientific.net/kem.495.83.

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Two kinds of Multiwall carbon nanotubes (MWCNT) networks “Buckypaper” were made by the vacuum filtration method of MWCNT aqueous suspension. The first one was prepared from pure CNT and the second from its oxidized form by acidic KMnO4 as oxidizing agent. The CNT oxidation increase content of oxygen bonded to the surface of CNT decreasing their hydrophobic character. The sensitivity of MWCNT networks to two kind of organic solvent vapors (ethanol and hepane) has been investigated by resistance measurements. The solvents had different polarities given by Hansen solubility parameters and nearly

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17

Lee, Eun-jin, Myung-Suk Kong, Ha-il Jung, Goo-Bok Jung, and Yoo-Hak Kim. "Adjustment of Soil pH and Redox Potential Using KOH and KMnO4 in Acidic Soils Applied with Immature Compost." Korean Journal of Soil Science and Fertilizer 51, no. 4 (2018): 648–56. http://dx.doi.org/10.7745/kjssf.2018.51.4.648.

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18

Chen, Jiuling, Qinghai Chen, Qing Ma, Yongdan Li, and Zhonghua Zhu. "Chemical treatment of CNTs in acidic KMnO4 solution and promoting effects on the corresponding Pd–Pt/CNTs catalyst." Journal of Molecular Catalysis A: Chemical 356 (April 2012): 114–20. http://dx.doi.org/10.1016/j.molcata.2011.12.032.

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19

Li, Cun Xiong, Chang Wei, Hong Sheng Xu, et al. "Recovery of Valuable Metals from Zinc Plant Residues by Two-Stage Selective Atmospheric Leaching Process." Advanced Materials Research 396-398 (November 2011): 552–55. http://dx.doi.org/10.4028/www.scientific.net/amr.396-398.552.

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A hydrometallurgical process was used for selectively extraction of valuable metals from zinc plant residues. The process includes the following two steps. (1) The zinc plant residue is treated by sulfuric acid atmospheric leaching process with KMnO4 as oxidatant to selectively dissolve zinc while leaving most (above 98 pct) of indium and germandium in the iron residues. (2) The iron residues are treated by acidic atmospheric leaching process with NaClO3 as oxidant to dissolve indium and germanium. The valuable metals of indium and germanium in the second leaching solution can be reclaimed by

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20

Puspitasari, Amelia, Sutanto Sutanto, and Linda Jati Kusumawadani. "Development of A Hybrid Method by Integrating Electrocoagulation Countinous System with Activated Charcoal Adsorption to Treat Sago Wastewater." Helium: Journal of Science and Applied Chemistry 2, no. 1 (2022): 13–19. http://dx.doi.org/10.33751/helium.v2i1.5482.

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Wastewater from the sago industry can pose a risk of pollution because it contains chemicals such as high organic matter content, fiber, 4% unextracted starch, nitrogen solution, and cyanoglucoside which are difficult to degrade in the environment. Sago wastewater is generally acidic, has foul smells, and has a high solids concentration. In this study, a hybrid method using electrocoagulation continuous system and activated carbon adsorption was developed to decrease organic and inorganic contaminates which considered importand environmental concern. These two methods have the advantages of si

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21

Moody, P. W., S. A. Yo, and R. L. Aitken. "Soil organic carbon, permanganate fractions, and the chemical properties of acidic soils." Soil Research 35, no. 6 (1997): 1301. http://dx.doi.org/10.1071/s97050.

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Total organic carbon (TC) in 32 acidic surface (0–10 cm) soils was divided into 3 fractions (C1, C2, and C3) based on oxidisability by different strengths of KMnO4 (33 mM and 167 mM). With the methodology used, ease of oxidation decreased in the order C1>C2>C3. Several fundamental soil chemical properties were also determined, i.e. ECEC, CEC at pH 6·5 (CEC6·5), slope of the charge curve (ΔCEC), pH buffer capacity, (pHBC), P sorption capacity using a single addition index (PSI150), and content of organically complexed Al. All soils had pH (1:5 water) <6·5, and comprised a wide range of

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22

MATSUMOTO, HISAO, and REIKO MATSUMOTO. "Investigations on the water pollution index. X. On the silver salts used in the high temperature acidic KMnO4(COD) method." Eisei kagaku 35, no. 3 (1989): 231–36. http://dx.doi.org/10.1248/jhs1956.35.231.

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23

Ataee, Monirah, Abdolmajid Fadaei, Gashtasb Mardani та Morteza Sedehi. "Removal of 17β-Estradiol (E2) from Aqueous Solutions Using Potassium Permanganate Combined with Ultraviolet (KMnO4/UV)". International Journal of Chemical Engineering 2020 (23 листопада 2020): 1–9. http://dx.doi.org/10.1155/2020/8877601.

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17β-Estradiol (E2) has a significant health risk to humans, even at the ng/L level, and is discharged to the aqueous environment through wastewater. Advanced oxidation processes were proposed as an efficient process for the removal of E2. In this study, a combination of ultraviolet-C (UV-C) and KMnO4 was applied for the removal of E2. Results have shown that the removal efficiency of E2 in pH 4 (acidic condition) was 93.80 ± 0.42%. But, removal efficiency in neutral (7) and alkaline (10) conditions was 78.3 ± 2.12% and 84 ± 0.71%, respectively. The effect of Fe+2, Ca+2, Mg+2, Mn+2, and Fe+3 io

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24

Volchyn, I. A., S. V. Mezin, and A. O. Yasinetsky. "PECULIARITIES OF ABSORPTION OF SULFUR DIOXIDE AND NITROGEN OXIDE IN SUSPENSIONS AND SOLUTIONS OF MANGANESE COMPOUNDS." Energy Technologies & Resource Saving, no. 4 (December 20, 2020): 49–56. http://dx.doi.org/10.33070/etars.4.2020.05.

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It is proposed to use manganese compounds to reduce emissions of sulfur and nitrogen oxides, large deposits of which are in Ukraine. The results of experimental studies of the binding of sulfur dioxide and potassium permanganate of nitric oxide in water by manganese oxide are presented. In the experiments, the model gas in the form of small bubbles was passed through the reactor with liquid. Heat and mass transfer processes between the gas and liquid phases occurred on the bubble surface. The gas-liquid contact time is the bubble rise time. The absorption reactions take place in the liquid pha

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Scepanovic, Jelena, Bojana Zindovic, Dragan Radonjic, Marijana Pantovic-Pavlovic, and Miroslav Pavlovic. "Influence of organic/inorganic inhibitors on AISI 304 (1.4301) and AISI 314 (1.4841) steels corrosion kinetics in nitric acid solution." Journal of the Serbian Chemical Society, no. 00 (2024): 76. http://dx.doi.org/10.2298/jsc240514076s.

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This study evaluates the effectiveness of KMnO4, MK3, and 1-butanol inhibitors on corrosion of AISI 314 and AISI 304 stainless steels using linear and potentiodynamic polarization in 0.1 M HNO3. Metrics like corrosion potential (Ecorr), current density (jcorr) and polarization resistance (Rp) assessed inhibitor efficacy. The inhibitors improved electrochemical parameters significantly, indicating strong anti-corrosive properties. 1-Butanol had the most profound effect, enhancing corrosion potential and drastically reducing corrosion current density, demonstrating superior protection. Results i

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Cerc Korošec, Romana, Polona Umek, Alexandre Gloter, Jana Padežnik Gomilšek та Peter Bukovec. "Structural properties and thermal stability of cobalt- and chromium-doped α-MnO2 nanorods". Beilstein Journal of Nanotechnology 8 (10 травня 2017): 1032–42. http://dx.doi.org/10.3762/bjnano.8.104.

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α-MnO2 nanorods were synthesized via the hydrothermal decomposition of KMnO4 in an acidic environment in the presence of Co2+ and Cr3+ ions. Reactions were carried out at three different temperatures: 90, 130 and 170 °C. All prepared samples exhibit a tetragonal MnO2 crystalline phase. SEM–EDS analysis shows that cobalt cations are incorporated to a higher degree into the MnO2 framework than chromium ions, and that the content of the dopant ions decreases with increasing reaction temperature. The oxidation of Co2+ to Co3+ during the reaction was proved by an XANES study, while EXAFS results co

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27

Lazic, Dragica, Jelena Skundric, Ljubica Vasiljevic, Slavica Sladojevic, and Dragana Blagojevic. "Characterization of mineral water from Vitinicki Kiseljak and kozluk springs." Chemical Industry 65, no. 3 (2011): 263–70. http://dx.doi.org/10.2298/hemind101220017l.

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The aim of this study was to determine the quality of the mineral water from Vitinicki Kiseljak (Nos. 1 to 9, except No. 3) and Kozluk springs that are located near the town of Zvornik in the northwestern Republic of Srpska, BIH. The results were compared with those presented in previous reaserches in order to determine if the water quality has changed and if the water is still suitable for therapeutic purposes. The physicochemical (temperature, odor, pH value, total hardness, electro-conductivity, evaporated residue, suspended materials, chemical consumption of oxygen and KMnO4) and chemical

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28

Syhalath, Chanthakhy. "Development of a smartphone-based colorimetric detection for quantification of vitamin C in dietary supplements and skin care products." Souphanouvong University Journal Multidisciplinary Research and Development 8, no. 2 (2024): 206–15. http://dx.doi.org/10.69692/sujmrd0802206.

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This research project presents a development of an assay tool for quantification of vitamin C in dietary supplements and skin care products. The proposed method was developed based on decolorization of acidic potassium permanganate (KMnO4) by vitamin C through a redox reaction, with subsequent colorimetric detection by using digital imaging. The imaging was carried out using smartphone camera and free-downloaded RGB color detector application. To obtain optimal conditions, influential parameters such as light source position installed inside a 19 cm × 46 cm × 10 cm lightbox, reagent concentrat

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Santos, Bruna Assis Paim dos, Aline Silva Cossolin, Hélen Cristina Oliveira dos Reis, et al. "Baker’s yeast-MnO2 composites as biosorbent for Malachite green: An ecofriendly approach for dye removal from aqueous solution." Ambiente e Agua - An Interdisciplinary Journal of Applied Science 14, no. 1 (2018): 1. http://dx.doi.org/10.4136/ambi-agua.2254.

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In this study, baker’s yeast-MnO2 composites, produced by direct oxidation of yeast with KMnO4 under acidic conditions, were used as biosorbent to remove the triphenylmethane dye Malachite green (MG) from an aqueous solution. Parameters that influence the adsorption process, such as pH, contact time, temperature, initial dye concentration and biosorbent dosage, were evaluated in batch experiments. The optimum removal of MG was found to be 86.7 mg g-1 at pH 10, 1.0 g L-1 of biomass dosage and 45°C. The kinetic data of dye removal was better described by the pseudo-second-order model. The adsorp

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Jawad, Nizar A., and Tariq M. Naife. "Removal of Heavy Metal Ions from Aqueous Solution by Nano Graphene Oxide." Chemistry & Chemical Technology 17, no. 4 (2023): 894–902. http://dx.doi.org/10.23939/chcht17.04.894.

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The study's objective is to produce and evaluate Nano Graphene Oxide (GO) before using it for batch adsorption to remove heavy metals (vanadium V+5, nickel Ni+2, and cadmium Cd+2) ions from aqueous solutions polluted with these metals, which were used to imitate the contaminating elements found in the liquid industrial wastewater of the Doura oil refinery in Baghdad, Iraq. This study used a modified Hummers method to synthesize. The main constituents in preparation GO were graphite powder (40-100 micron), H2SO4 acid, and KMnO4 powder. The GO structure synthesized and optical properties were in

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Żuromska-Witek, Barbara, Paweł Żmudzki, Marek Szlósarczyk, Anna Maślanka, and Urszula Hubicka. "Development and Validation of Stability-Indicating HPLC Methods for the Estimation of Lomefloxacin and Balofloxacin Oxidation Process under ACVA, H2O2, or KMnO4 Treatment. Kinetic Evaluation and Identification of Degradation Products by Mass Spectrometry." Molecules 25, no. 22 (2020): 5251. http://dx.doi.org/10.3390/molecules25225251.

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The oxidation of lomefloxacin (LOM) and balofloxacin (BAL) under the influence of azo initiator of radical reactions of 4,4′-azobis(4-cyanopentanoic acid) (ACVA) and H2O2 was examined. Oxidation using H2O2 was performed at room temperature while using ACVA at temperatures: 40, 50, 60 °C. Additionally, the oxidation process of BAL under the influence of KMnO4 in an acidic medium was investigated. New stability-indicating HPLC methods were developed in order to evaluate the oxidation process. Chromatographic analysis was carried out using the Kinetex 5u XB—C18 100A column, Phenomenex (Torrance,

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Anh, Nguyen Thi Quynh. "Binary copper and manganese oxide nanoparticle supported oms-2 for enhancing activity and stability toward co oxidation reaction at low temperature." Vietnam Journal of Science and Technology 56, no. 6 (2018): 741. http://dx.doi.org/10.15625/2525-2518/56/6/13067.

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The CuO, CuMnOx and MnOx catalysts were anchored on the manganese oxide support with the structure of octahedral molecular sieves (OMS-2), which were synthesized using MnSO4 and KMnO4 as precursors by are flux method under acidic conditions, by an impregnation method and tested for CO oxidation. These catalysts and OMS-2 support were characterized by the advanced analyzations of X-ray diffraction and FTIR patterns; and SEM performances; and H2-TPR profiles. For CO oxidation reaction, CuO and CuMnOx catalysts showed extremely higher activities than that of MnOx catalyst and OMS-2 support. For t

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Susmitha, K., M. Thirumalachary, and G. Venkateshwarlu. "Spectrophotometric Determination of Bromhexine HCl in Pure and Pharmaceutical Forms." ISRN Analytical Chemistry 2013 (August 12, 2013): 1–7. http://dx.doi.org/10.1155/2013/861851.

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Five spectrophotometric methods for determination of bromhexine HCl have been developed, validated, and applied for the assay of the drug in pharmaceuticals. Methods A, B, and C are based on ion-pair complexation of drug, in acidic buffers, with triphenylmethane dyes, namely, bromothymol blue (BTB), bromophenol blue (BPB), and bromocresol green (BCG). The complexes are extracted into chloroform, and absorbance is measured at around 415 nm as function of concentration of the drug. The stoichiometry of the complex is found to be 1 : 1 in each case. Method D depends upon charge-transfer complexat

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Goh, Chin-Ping, and Poh-Eng Lim. "POTASSIUM PERMANGANATE AS OXIDANT IN THE COD TEST FOR SALINE WATER SAMPLES." ASEAN Journal on Science and Technology for Development 25, no. 2 (2017): 383–93. http://dx.doi.org/10.29037/ajstd.269.

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The objective of this study is to investigate the feasibility of applying potassium permanganate (KMnO4) as the oxidant in the COD test for highly saline water samples. Initially, the COD values of various glucose standard solutions were determined by three methods, namely the standard closed reflux dichromate (CODCr), the acidic permanganate (CODMn) and the alkaline permanganate (CODOH) methods. The results showed that at COD values lower than 20 mg/L, the standard dichromate method was not applicable due to its poor precision (RSD > 10%). The CODOH method was less effective compared to th

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Puteri, Juliana, Anni Anggraeni, Ari Hardianto, and Husein H. Bahti. "Oksidasi Serium Berdasarkan Agen Pengoksidasi." Jurnal Sains dan Kesehatan 5, no. 3 (2023): 409–19. http://dx.doi.org/10.25026/jsk.v5i3.1722.

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Rare earth elements (REEs) is the name given to 15 elements from the lanthanide group and 2 elements have the same chemical properties that make them included in the REEs, namely scandium and yttrium. The use of rare earths triggers the development of new materials for application, one of which is cerium metal. Currently, cerium is widely applied in industry to improve product quality, one example is as a catalyst to increase the power output of Ni-MH batteries. In the world of health, cerium has been developed for use in electrochemical sensing and electrochemical biosensors, as well as drug

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Li, Lin, Huangling Gu, Qiong Wang, Meiyin Chen, Wenjing Ma, and Hongwei Zhang. "Synthesis of Fe(III)-g-C3N4 and Applications of Synergistic Catalyzed PMS with Mn(VII) for Methylene Blue Degradation." Sustainability 16, no. 6 (2024): 2364. http://dx.doi.org/10.3390/su16062364.

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Refractory organic pollutants pose a great threat to public health in water bodies due to their toxicity and low biodegradability. Developing a method of activating persulfate efficiently and in an environmentally friendly way has become a popular topic of research in current advanced oxidation water treatment technologies. Fe(III)-g-C3N4 was prepared by the calcination method. Fe(III) was anchored on the framework of g-C3N4. The characterization analysis indicated that Fe(III) was successfully loaded on g-C3N4. The best effect for MB degradation was Fe(III)-g-C3N4 (0.1 g/L) dosed with 30 µmol

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Ratnawaty, Gervacia Jenny, and Maulidiyah Salim. "Effectiveness of Moringa oleifera and PAC (Poly Aluminum Cloride) Leaves in Peat Organic Substances in Rasau Jaya Village, Kubu Raya Regency." INTEK: Jurnal Penelitian 8, no. 1 (2021): 17. http://dx.doi.org/10.31963/intek.v8i1.2729.

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One source of surface water in West Kalimantan is peat water that has low turbidity, dark brown to black (124 - 850 units of PtCo), high organic content (138-1560 mg / L KMnO4), and is acidic (pH 3,7 - 5,3). The purpose of this study was to determine the effect of the addition of PAC and Moringa oleifera leaves to the decrease in levels of peat organic water in the Rasau Jaya village area, Kubu Raya Regency. The method used in this research is by mixing Moringa leaf powder and PAC (Poly Aluminum Cloride) in peat water accompanied by stirring and precipitating. Furthermore, peat water samples w

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Bivolarska, Anelia V., Ana I. Maneva, Penka D. Gatseva, and Mariana N. Katsarova. "Effect of Nitrates, Thiocyanates and Selenium on the Iron and Iodine Status of Postpartum Women." Folia Medica 58, no. 3 (2016): 188–94. http://dx.doi.org/10.1515/folmed-2016-0024.

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AbstractAim:To find correlations between high thiocyanate and nitrate levels and low selenium levels and the indicators of the iodine and iron status of postpartum women.Materials and methods:The study included 41 mothers aged 26.4±5.9 yrs from Asenovgrad and nearby villages. Urinary iodine was determined by the Sandell-Kolthoff reaction and thiocyanate – by the interaction of these ions with acidic solution of KMnO4; for serum nitrates we used the colorimetric method; serum selenium was assessed by electro-thermal atomic-absorption spectrophotometry; thyroxin (FT4), the thyroid stimulating ho

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Teimouri, Samaneh, Johannes Herman Potgieter, Mari Lundström, Caren Billing, and Benjamin P. Wilson. "A New Hydrometallurgical Process for Metal Extraction from Electric Arc Furnace Dust Using Ionic Liquids." Materials 15, no. 23 (2022): 8648. http://dx.doi.org/10.3390/ma15238648.

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This research proposes a new hydrometallurgical method for Zn, In, and Ga extraction, along with Fe as a common impurity, from electric arc furnace dust (EAFD), using ionic liquids. EAFD is a metal-containing waste fraction generated in significant amounts during the process of steelmaking from scrap material in an electric arc furnace. With valuable metal recovery as the main goal, two ionic liquids, [Bmim+HSO4−] and [Bmim+Cl−], were studied in conjunction with three oxidants: Fe2(SO4)3, KMnO4, and H2O2. The results indicated that the best combination was [Bmim+HSO4−] with [Fe2(SO4)3]. An exp

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Qarah, Nagib, Ezzouhra El-maaıden, and Kanakapura Basavaiah. "SIMPLE AND SENSITIVE SPECTROPHOTOMETRIC ASSAYS FOR THE DETERMINATION OF TERBINAFINE HCL ANTIFUNGAL DRUG IN PHARMACEUTICALS." Ankara Universitesi Eczacilik Fakultesi Dergisi 48, no. 3 (2024): 10. http://dx.doi.org/10.33483/jfpau.1348367.

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Objective: Two highly sensitive, accurate, inexpensive, and simple spectrophotometric assays were developed and validated for the determination of an anti-fungal drug, Terbinafine HCl (TBH), in pure drug and tablets using potassium permanganate (PP) and disodium 2-(1,3-dioxo-2,3-dihydro-1H-inden-2-yl)quinoline-6,8-disulfonate (DSOQ). Material and Method: In the present study, Sebifin and Terbiforce 250 mg tablets were used as pharmaceuticals, potassium permanganate KMnO4 and disodium 2-(1,3-dioxo-2,3-dihydro-1H-inden-2-yl)quinoline-6,8-disulfonate in water were used as reagents, and DR 3900 sp

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Mineo, Antonio, Leto Ylenia Di, Alida Cosenza, et al. "Enhancing volatile fatty acid production from sewage sludge in batch fermentation tests." Chemosphere 349 (December 2, 2023): 140859. https://doi.org/10.1016/j.chemosphere.2023.140859.

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Volatile fatty acids (VFA) from sewage sludge represent an excellent recovered resource from wastewater treatment. This study investigated four sludge pre-treatments (namely, potassium permanganate - KMnO4, initial pH = 10, initial pH = 2.5 and low-temperature thermal hydrolysis) by operating batch reactors under acidogenic fermentation conditions. Results revealed that 0.1 g KMnO4/g of total suspended solids represents the best pretreatment obtaining up to 2713 mgCOD L-1 and 452 mgCOD/g of volatile suspended solids. These results also paralleled metataxonomic analysis highlighting changes in

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Sulistyowati, Nanik, Sriyanti Sriyanti, and Adi Darmawan. "Effect of Acid on Natural Zeolite Dealumination on Indigo Carmine Adsorption Capability." Jurnal Kimia Sains dan Aplikasi 21, no. 2 (2018): 102–6. http://dx.doi.org/10.14710/jksa.21.2.102-106.

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Modifying natural zeolite with dealumination using H2SO4 and HCl, and its application to adsorb indigo carmine has been performed. Dealumination was carried out by reacting a natural zeolite with a mixture of KMnO4-H2SO4 and a mixture of KMnO4-HCl then refluxed for 5 hours followed by washing with demineralized water until a neutral pH was obtained and dried for 12 hours at 80°C. Dealuminated zeolites were then characterized by XRD, FTIR and Si/Al ratio measurements. Dealuminated zeolite was then used to adsorb indigo carmine in a batch-shaker system for 30 min with concentration variation XRD

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LJ, Bordoloi, Singh AK, Manoj-Kumar, Patiram, and S. Hazarika. "Evaluation of nitrogen availability indices and their relationship with plant response on acidic soils of India." Plant, Soil and Environment 59, No. 6 (2013): 235–40. http://dx.doi.org/10.17221/675/2012-pse.

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Plant&rsquo;s nitrogen (N) requirement that is not fulfilled by available N in soil has to be supplied externally through chemical fertilizers. A reliable estimate of soil N-supplying capacity (NSC) is therefore essential for efficient fertilizer use. In this study involving a pot experiment with twenty acidic soils varying widely in properties, we evaluated six chemical indices of soil N-availability viz. organic carbon (C<sub>org</sub>), total N (N<sub>tot</sub>), acid and alkaline-KMnO<sub>4</sub> extractable-N, hot KCl extractable-N (KCl-N) and phosp

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Khataee, Alireza, Roya Lotfi, Aliyeh Hasanzadeh, and Mortaza Iranifam. "A simple and sensitive flow injection method based on the catalytic activity of CdS quantum dots in an acidic permanganate chemiluminescence system for determination of formaldehyde in water and wastewater." Photochemical & Photobiological Sciences 15, no. 4 (2016): 496–505. http://dx.doi.org/10.1039/c5pp00452g.

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Wiryawan, Adam, Rurini Retnowati, Perry Burhan, and Syekhfani Syekhfani. "METHOD OF ANALYSIS FOR DETERMINATION OF THE CHROMIUM (Cr) SPECIES IN WATER SAMPLES BY SPECTROPHOTOMETRY WITH DIPHENYLCARBAZIDE." Journal of Enviromental Engineering and Sustainable Technology 5, no. 1 (2018): 37. http://dx.doi.org/10.21776/ub.jeest.2018.005.01.6.

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<p>Speciation of Chromium (Cr) is very important because of the toxicity of these metals depending on the oxidation number and its concentration is very low in the water system. Chromium occurs in the environment primarily in two valence states, trivalent Cr(III) and hexavalent Cr(VI). Chromium (III) is an essential micro-nutrients for the human body, while the Cr(VI) is highly toxic and carcino-gennic. Chromium(VI) in the water can be analyzed by spectrophotometry with diphenylcarbazide as reagent on pH=1 at maximum wavelength of 540 nm. The experimental result show that Cr(VI) can be a

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KHAN, Muhammad Shoaib, Muhammad ASGHAR, and Mohammed YAQOOB. "Lansoprazole Determination in Pharmaceutical Formulations by Flow Injection Coupled with Acidic KMnO₄–Quinine Chemiluminescence System." Analytical Sciences 35, no. 8 (2019): 861–67. http://dx.doi.org/10.2116/analsci.19p039.

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Bartke, Michael, and Wolfgang Pfleiderer. "Pteridines, XC Syntheses, Oxidations, Properties, and Reactions of 2-Thiopteridine-4,6, 7- trione Derivatives." Pteridines 1, no. 2 (1989): 83–90. http://dx.doi.org/10.1515/pteridines.1989.1.2.83.

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Summary A new efficient synthesis for 2-thiopteridine-4,6,7-triones (6-10, 15) has been found in the condendation of the appropriate 5,6-diaminopyrimidine (1-5, 14) with oxalic acid in DMF. Analogous condensations with dimethyl oxalate led to S-alkylation probably via an intermediate O-methylation of the DMF. 8-Methyl-2- thiopteridine-4,6,7-trione (10) shows a ring contraction to 9-methyl-2-thioxanthine (13) on base treatment. Oxidations by H20 2 and KMn04 respectively lead to the corresponding 2-sulfinate 22 and the 2-sulfonates 17 -19. Oxidative desulfurization takes place in formic acid wit

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Kłosowski, Stanisław, and Marcin Szańkowski. "Habitat differentiation of the Myriophyllum altemiflorum and Littorella uniflora phytocoenoses in Poland." Acta Societatis Botanicorum Poloniae 73, no. 1 (2011): 79–86. http://dx.doi.org/10.5586/asbp.2004.013.

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The present study showed the ecological differentiation of phytocoenoses dominated either by <em>Myriophyllum alterniflorum</em> or by <em>Littorella uniflora</em>, which in Poland are classified within the Myriophylletum alterniflori or Myriophyllo-Littorelletum association. The properties which best differentiated the waters of the above types of phytocoenoses were calcium and factors associated with the carbonate complex (pH, electrolytic conductivity, total and carbonate hardness), and pH in the case of substrates. The most distinct differences in the habitats were

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Bayomi, Ahmed M., Eglal R. Souaya, Eman H. Ismail, Gehad G. Mohamed, and Mahmoud Mohamed Fouad Hussein. "Reducing disinfection byproduct precursors through coagulation enhancement as particle weight and size control using potassium permanganate." Journal of Water and Health, December 23, 2022. http://dx.doi.org/10.2166/wh.2022.143.

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Abstract The widespread use of chlorine pre-oxidation in water purification has been limited in several countries owing to the production of carcinogenic byproducts when combined with naturally occurring organic matter. This study investigates the efficient use of potassium permanganate (KMnO4) pretreatment and coagulation enhancement as particle size and molecular weight distribution controlling parameters. KMnO4 pretreatment significantly reduced the apparent molecular weight of humic acid due to KMnO4 reduction and the continuous generation of manganese dioxide (MnO2) formed in situ under n

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Li, Yang, Guanjie Jiang, Nanqi Ouyang, Zhangjie Qin, Shuai Lan, and Qin Zhang. "The Controlled Synthesis of Birnessite Nanoflowers via H2O2 Reducing KMnO4 For Efficient Adsorption and Photooxidation Activity." Frontiers in Chemistry 9 (May 26, 2021). http://dx.doi.org/10.3389/fchem.2021.699513.

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Birnessite nanoflowers composed of layers have been proven to be the strongest adsorbent and oxidant in the surface environment. However, the current synthesis methods of birnessite nanoflowers are suffering from long reaction time and high reaction temperature. Based on these, this paper explores a new method for the rapid and controlled synthesis of layered manganese oxides. The method relies on the molar ratios of KMnO4 and H2O2 redox reacting species to drive the production of birnessite nanoflowers under acidic conditions. The molar ratios of KMnO4 and H2O2 are the key to the crystal stru

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