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Artículos de revistas sobre el tema "Chromium research"

Autor: Grafiati
Publicado: 4 de junio de 2021
Última modificación: 20 de febrero de 2023

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1

Martynenko, V. V., P. O. Kushchenko, I. G. Shulyk, Yu Ye Mishnyova, K. I. Kushchenko, and Yu O. Krakhmal. "Properties dependence of chromia and alumina-chromia-zirconia-silica refractories with a mass fraction of 30 % Cr2O3 on the type of chromium oxide." Scientific research on refractories and technical ceramics 121 (December 30, 2021): 23–35. http://dx.doi.org/10.35857/2663-3566.121.03.

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In JSC “URIR named after A. S. Berezhnoy” chromia refractories for the lining of pool and feeder of glass-making furnaces for the production of glass fiber from E glass, which are in contact with the glass melt, and alumina-chromia-zirconia-silica refractories with 30 % Cr2O3 for service in the topsides of these furnaces, in areas affected by components of the glass batch and glass melt, have been developed and manufactured. The main raw material for the chromia products manufacturing is metallurgical chromium oxide. In the manufacture of alumina-chromia-zirconia-silica products, metallurgical
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2

SHIRYAEV, Pavel Borisovich, and Nadezhda Vladimirovna VAKHRUSHEVA. "Genesis of podiform chromitites – a review of models." NEWS of the Ural State Mining University 1, no. 2 (June 15, 2020): 20–29. http://dx.doi.org/10.21440/2307-2091-2020-2-20-29.

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Relevance of the work. Research aimed at identification of genesis of chromium ores in alpine-type hyperbasites has been conducted by scientists (geologists, petrologists and geochemists) around the world for more than a century. Nevertheless, the issue of their origin remains debatable to this day. The purpose of the work is to highlight the main stages of the development of scientific ideas about the genesis of chromian mineralization in alpinotype hyperbasites; to present and summarize the main, most significant and innovative scientific ideas of Russian and foreign experts who have been in
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3

Eric, R. H. "Chromous capacities of ferrochromium and matte smelting slags." Archives of Materials Science and Engineering 2, no. 93 (October 1, 2018): 49–58. http://dx.doi.org/10.5604/01.3001.0012.7354.

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Purpose: of this paper is to extend the slag capacity concept to sparingly soluble cationic species encountered for example in matte smelting and ferrochromium processing in terms of chromous capacities. Design/methodology/approach: In this context in order to develop the chromous capacity the experimental data on slag-metal equilibrium for ferrochromium smelting and on chromium distribution between slag and matte phases encountered in sulphide smelting of PGM (Platinum Group Metals) and chromium containing copper nickel concentrates were used. Findings: The calculated chromous capacities were
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4

Liu, Hao Rui, and Chang Xin Nai. "Research on Environmental Materials with Complex Resistivity Dispersion Properties of Chrome-Contaminated Soil." Applied Mechanics and Materials 540 (April 2014): 263–66. http://dx.doi.org/10.4028/www.scientific.net/amm.540.263.

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The complex resistivity dispersion experiment of the soil with different water content and different chromic salt content is the base of the complex resistivity detection method which will be used for evaluating the field polluted by chromium residue. By the soil complex resistivity dispersion properties experiment in kinds of conditions, we find that complex resistivity amplitude, phase, in-phase resistivity and out-phase resistivity can be influenced by the water content and contamination content; but the complex phase and out-phase resistivity have the obvious dispersion properties. The exp
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5

Chen, Yong, and Xiao Li Wen. "Chromium-Containing Solid Waste Soluble Six Chromium Leaching Influence Factor Research." Advanced Materials Research 482-484 (February 2012): 2496–99. http://dx.doi.org/10.4028/www.scientific.net/amr.482-484.2496.

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Through the research of determining chromium-containing solid waste in different leaching conditions of Cr6+ leaching concentration, get Cr6+ leaching conditions, for the follow-up of the harmless treatment to provide reliable technical parameters.
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6

Shi, Yu Min, Tong Wang, Cheng Hu, Lin Bai, and Zhi Tong Sui. "Research on Detoxifying Treatment to Chromium Slag." Advanced Materials Research 402 (November 2011): 61–65. http://dx.doi.org/10.4028/www.scientific.net/amr.402.61.

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A particular industrial waste was selected as reducer for detoxified chromium slag in solid phase. Oxidation resisting was also tested. The results showed that concentration of Cr(Ⅵ)in the products was related to experimental condition, such as the proportion of chromium slag, the granularity of reactants, the reaction temperature and time . The leached Cr(Ⅵ)in the products was remained below 0.5 ppm of GB8978-1996 limits.
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7

Veillon, Claude, and Kristine Y. Patterson. "Analytical issues in nutritional chromium research." Journal of Trace Elements in Experimental Medicine 12, no. 2 (1999): 99–109. http://dx.doi.org/10.1002/(sici)1520-670x(1999)12:2<99::aid-jtra7>3.0.co;2-m.

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8

Chen, Da Qing, Hai Bin Wang, Ji Chuan Huo, Yong Lin Lei, and Wei Ai. "The Research of the Orgince Silicone Emulsion Hybridized Chromium-Aluminum Phosphate Composites." Advanced Materials Research 699 (May 2013): 519–23. http://dx.doi.org/10.4028/www.scientific.net/amr.699.519.

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In the paper ,the preparation of the orgincesilicone emulsion hybridized chromium-aluminum phosphateand thecomposites was studied.The aluminum-chromium-phosphate washybridizedbyadding the orgincesilicone emulsio-n, the tensile lap-shear strength of the hybridized aluminum-chromium-phosphateincreasedfrom1.2MPato4.0MPaor more, its dielectricconstantwasreducedfromabout 4.0toabout3.6; the flexural strength of the composites was increased from80Mpa tomore than120Mpa and the the moisture rate of the composites reduced to about 1.6%
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9

Li, Xue Lei, Xiao Hang Liu, Hao Bin Tian, and Wen Jing Yuan. "Experimental Research on Hard and Crack-Free Electrodeposited Chromium Coatings." Advanced Materials Research 1044-1045 (October 2014): 47–52. http://dx.doi.org/10.4028/www.scientific.net/amr.1044-1045.47.

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In order to eliminate cracks in the chromium coating, a novel method named flexible extrusion assisted chromium electroplating was proposed. The bright and crack-free chromium coatings were electrodeposited by using the perturbation and extrusion of hard and insulating particles. The prepared deposits were characterized by scanning electron microscope (SEM) and three-dimensional topography. The testing results showed that the surface was very smooth and there was no micro cracks in the coating. Micro hardness of the electrodeposited layer was also tested. It was confirmed that the chromium coa
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10

Xu, Liu Jie, Guo Shang Zhang, Ji Wen Li, Zhan Wu Dong, and Shi Zhong Wei. "Research on Microstructure and Mechanical Properties of High Boron Cast Steel." Advanced Materials Research 189-193 (February 2011): 3968–71. http://dx.doi.org/10.4028/www.scientific.net/amr.189-193.3968.

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In recent years, high chromium cast irons have been widely applied in many fields because they have high hardness and abrasion resistance. However, high chromium cast irons are also expensive because much alloying elements, such as chromium, molybdenum and nickel, are added into them. In order to resolve above question, a new abrasion-resistant steel with high boron content was developed in this paper. The new high boron steel, with 0.6%~0.8%B and 0.65% C, was prepared using sand casting method. The microstructure and mechanical properties were researched. The results show that the solidificat
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11

Li, Bao Yuan, Hong Bo Guo, Liu Jie Xu, Shi Zhong Wei, Kun Wu, Xiong Yang, and Guang Du. "Research on Corrosive Wear Properties of Super High Chromium Cast Iron." Advanced Materials Research 1094 (March 2015): 292–95. http://dx.doi.org/10.4028/www.scientific.net/amr.1094.292.

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National standard high chromium cast iron contains 26% chromium by weight (Cr26). A new type of Super High Chromium Cast Iron (SHCCI) has been developed with chromium content of about 37% by weight. This paper examines the microstructure of SHCCI using SEM and XRD. The hardness and toughness of SHCCI was studied and the corrosive wear properties of SHCCI were also examined using an MCF-30 type erosion abrasion tester under H3PO4 media. The results show that, the microstructure of SHCCI is composed of M7C3 and M23C6 carbides, martensite matrix and residual austenite matrix. With proportionately
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12

Fomichev, V. T., A. V. Savchenko, and G. P. Gubarevich. "Functional Galvanic Coatings of the Cr-Zn System." Materials Science Forum 945 (February 2019): 688–94. http://dx.doi.org/10.4028/www.scientific.net/msf.945.688.

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The authors have studied the influence of the electric current density, temperature, electrolyte composition on the properties of electroplating Chromium-Zinc deposits. The dependence of the maximum yield of metal on the physico-chemical characteristics of the solutions for electroplating of Chromium and Cr-Zn alloy has been shown. Chromium-Zinc coatings have been obtained from electrolytes based on chromic acid in the presence of organic additive (4-methylaminophenol). Abrupt nonlinear changes in density, viscosity, surface tension, specific electrical conductivity due to structural transform
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13

Liu, Yan, Mao Fa Jiang, and De Yong Wang. "Research on the Thermodynamics and Kinetics of Chromium Ore Smelting Reduction Process for Producing Stainless Steel." Applied Mechanics and Materials 401-403 (September 2013): 704–7. http://dx.doi.org/10.4028/www.scientific.net/amm.401-403.704.

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For describing and resolving the process of chromium ore smelting reduction preferably, the research status on the thermodynamics and kinetics of chromium ore smelting reduction process was summarized, based on the introduction of the process for smelting stainless steel with hot metal in a converter. The existing problems for smelting stainless steel by chromium ore smelting reduction in a converter were also discussed and some suggestions were made for the future work. A lot of investigations about the thermodynamics and the reduction mechanisms of chromium ore have been done. However, the c
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14

Gidikova, N., M. Sulowski, V. Petkov, R. Valov, and G. Cempura. "Composite Coatings of Chromium and Nanodiamond Particles on Steel." Archives of Metallurgy and Materials 62, no. 4 (December 1, 2017): 2421–24. http://dx.doi.org/10.1515/amm-2017-0356.

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AbstractChrome plating is used to improve the properties of metal surfaces like hardness, corrosion resistance and wear resistance in machine building. To further improve these properties, an electrodeposited chromium coating on steel, modified with nanodiamond particles is proposed. The nanodiamond particles (average size 4 nm measured by TEM) are produced by detonation synthesis (NDDS). The composite coating (Cr+NDDS) has an increased thickness, about two times greater microhardness and finer micro-structure compared to that of unmodified chromium coating obtained under the same galvanizatio
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15

Lomakin, Viktor, Volodymyr Kropivnyi, Viktor Pukalov, and Lyudmyla Molokost. "Research and Comparative Analysis of Wear Resistance of Cast Grinding Media From Chromium Cast Irons." Central Ukrainian Scientific Bulletin. Technical Sciences 2, no. 5(36) (2022): 51–57. http://dx.doi.org/10.32515/2664-262x.2022.5(36).2.51-57.

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A study was made of the impact-abrasive wear resistance and impact resistance of grinding bodies cast in a multi-place mold. Three types of chromium cast irons were adopted for the study: low chromium (~1% Cr), medium chromium (up to 5% Cr) and high chromium (up to 20% Cr). The macro- and microstructure of these alloys as a material for cast grinding balls has been studied. Installed an increase in the impact-abrasive wear resistance and impact resistance of such products with an increase in the mass fraction of chromium in cast iron due to the formation of carbides of the (Fe, Cr)3C and espec
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16

Arishi, Amr, and Ibrahim Mashhour. "Microbial Mechanisms for Remediation of Hexavalent Chromium and their Large-Scale Applications; Current Research and Future Directions." Journal of Pure and Applied Microbiology 15, no. 1 (February 22, 2021): 53–67. http://dx.doi.org/10.22207/jpam.15.1.32.

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The increase of anthropogenic activities has led to the pollution of the environment by heavy metals, including chromium (Cr). There are two common oxidative states of Cr that can be found in industrial effluents the trivalent chromium Cr(III) and the hexavalent chromium Cr(VI). While the hexavalent chromium Cr(VI) is highly toxic and can trigger serious human health issues, its reduced form, the trivalent chromium Cr(III), is less toxic and insoluble. Leather tanning is an important industry in many developing countries and serves as a major source of Cr(VI) contamination. Globally, tannery f
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17

Gu, Li Ping, Shao Guang Liu, Dong Liang Gu, and Yu Song Xu. "Failure Analysis and Research Progress of Resurfacing Welding Material of Coal Mill Roller." Advanced Materials Research 873 (December 2013): 514–18. http://dx.doi.org/10.4028/www.scientific.net/amr.873.514.

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Failure mode of coal mill roller was comprehensively analyzed and current situation of mill roller repair was elaborated. Process characteristic and application effect of metal cerement and high chromium cast iron building-up materials were expounded in the article. Owing to excellent wear resistant and low cost, high chromium cast iron building-up materials have been applied widely. The current research situation of self-shielded flux-cored wire with high chromium cast iron was summarized and the existing problem and probable solution were pointed. Key word: Coal mill roller, Abrasive wear, F
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18

Gochfeld, M. "Setting the research agenda for chromium risk assessment." Environmental Health Perspectives 92 (May 1991): 3–5. http://dx.doi.org/10.1289/ehp.91923.

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19

Islam, Md Aminul, Michael J. Angove, and David W. Morton. "Recent innovative research on chromium (VI) adsorption mechanism." Environmental Nanotechnology, Monitoring & Management 12 (December 2019): 100267. http://dx.doi.org/10.1016/j.enmm.2019.100267.

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20

Rizky, Hana Eka, and Jojok Mukono. "Levels of Chromium in Air with Chromium in the Blood of Workers Electroplating in Purbalingga." JURNAL KESEHATAN LINGKUNGAN 9, no. 2 (July 27, 2018): 172. http://dx.doi.org/10.20473/jkl.v9i2.2017.172-180.

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Chromium (VI) is a form of chromium which commonly used in metal plating industry with engineering electroplating. The negative impacts for workers when contact with chromium are, skin irritation, nose, throat and lungs irritations. Research purposes are to describe the levels of chromium in the air and the blood of electroplating workers. This was an observational research design with cross sectional approach. Data analyzed by descriptive methods. Population of this research were electroplating workers of metal plating industry in Purbalingga. The samples were consisted of the respondents and
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21

Suárez García, Óscar Javier. "Obtaining decorative chromium plating from trivalent chromium solutions." Ingeniería e Investigación 26, no. 2 (May 1, 2006): 75–83. http://dx.doi.org/10.15446/ing.investig.v26n2.14739.

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The present work was aimed at a qualitative evaluation, in the laboratory, of different alternatives for assembling and operating a trivalent chromium bath for decorative chromium plating. Different chromium concentration solutions and different complexing agents were used. The initial result of this analysis was that chloride, formate and acetate solutions produced the best results. Solution preparation conditions were evaluated: temperature, chromium III complex formation time and also operation during the plating process: pH and temperature. The experimental work was done in the Alfacrom Lt
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22

Martinuzzi, Stefano Mauro, Lorenzo Donati, Walter Giurlani, Federico Pizzetti, Emanuele Galvanetto, Nicola Calisi, Massimo Innocenti, and Stefano Caporali. "A Comparative Research on Corrosion Behavior of Electroplated and Magnetron Sputtered Chromium Coatings." Coatings 12, no. 2 (February 15, 2022): 257. http://dx.doi.org/10.3390/coatings12020257.

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Chromium deposits rank among the most widespread metal coatings for functional and decorative purposes. However, electrodeposition from Cr(VI) aqueous solution, which is the industrial process currently used to achieve thin chromium deposits, presents several environmental issues, urging the development of alternative solutions. In this study, which aims to compare the functional and aesthetical properties of decorative coatings, 800 nm thick chromium layers were deposited directly onto copper substrates by means of magnetron sputtering (MS) and direct current electrodeposition (ED). The obtai
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23

Chauhan, Jasgurpreet Singh. "A Bibliometric Analysis and Visualisation of Research Trends in Allergy of Chromium Implants." Turkish Journal of Computer and Mathematics Education (TURCOMAT) 12, no. 2 (April 11, 2021): 45–50. http://dx.doi.org/10.17762/turcomat.v12i2.674.

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The metal hypersensitivity of implants is a vital factor affecting the safety of implants. The bibliometric analysis had been conducted to understand the active authors, organizations, journals, and countries involved in the research domain of “allergy of Chromium implants”. All published articles related to “allergy of Chromium implants” from “Scopus”, were analyzed using the VOS viewer to develop analysis tables and visualization maps. This article had set the objective to consolidate the scientific literature regarding “allergy of Chromium implants” and also to find out the trends related t
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24

P.Faux, Stephen, Min Gao, James K. Chipman, and Leonard S. Levy. "Production of 8-hydroxydeoxyguanosine in isolated DNA by chromium(VI) and chromium(V)." Carcinogenesis 13, no. 9 (1992): 1667–69. http://dx.doi.org/10.1093/carcin/13.9.1667.

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25

Fitrianto, Nur, Siti Samiyarsih, Dede Winda Nur Fauziah, and Sri Lestari. "THE EFFECT OF CHROMIUM STRESS ON MICRO-ANATOMICAL PROFILE OF CHILI (Capsicum annuum L.)." BERITA BIOLOGI 20, no. 1 (May 10, 2021): 103–13. http://dx.doi.org/10.14203/beritabiologi.v20i1.3866.

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Chromium contamination can affect morphological, physiological, and anatomical changes, especially in chili vegetative organs. This research aims to understand micro-anatomical structure of the vegetative organs of chili subjected to chromium stress. The aim of the research is to know whether there is a micro-anatomical character difference between contaminated and uncontaminated chromium. The experimental methods using a completely randomized design (CRD). The independent variable is five levels of chromium concentration, i.e., 0; 50; 100; 200; and 300 ppm. The method of preparing anatomical
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26

Gill, Rana. "A Bibliometric Analysis and Visualisation of Research Trends in Toxicity of Chromium Implants." Turkish Journal of Computer and Mathematics Education (TURCOMAT) 12, no. 2 (April 11, 2021): 126–30. http://dx.doi.org/10.17762/turcomat.v12i2.689.

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The toxicity of implants is a vital factor affecting the safety of implants. The bibliometric analysis had been conducted to understand the active authors, organizations, journals, and countries involved in the research domain of “toxicity of Chromium implants”. All published articles related to “toxicity of Chromium implants” from “Scopus”, were analyzed using the VOS viewer to develop analysis tables and visualization maps. This article had set the objective to consolidate the scientific literature regarding “toxicity of Chromium implants” and also to find out the trends related to the same.
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27

Bawane, Shivani S., and Dr A. M. Nikalje. "Effect of Hard Chroming on Wear Loss of Rotavator Blade." International Journal for Research in Applied Science and Engineering Technology 10, no. 10 (October 31, 2022): 594–99. http://dx.doi.org/10.22214/ijraset.2022.47053.

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Abstract: Rotavator is the most important equipment which has been increasingly used in agricultural fields. To decrease the human effort and total time required in soil bed preparation. During the working condition, the rotary tilleris subjected to extreme abrasive wear. This problem is faced all over the world. Which considerably affects the service life of the tiller blade. Due to the abrasive wear, the rotavator blade requires frequent replacement resulting in increasing machine downtime and maintenance costs. So, it is necessary to improve the service life of the tiller blade. In the pres
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28

Marushko, Yu V., N. G. Kostynska, T. V. Hyshchak, and T. V. Marushko. "The biological role of chromium and the impact of changes in its content on the course of obesity and hypertension in children (literature review, own research)." Modern pediatrics. Ukraine, no. 3(123) (April 30, 2022): 73–79. http://dx.doi.org/10.15574/sp.2022.123.73.

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The study of the role of certain microelements deficiency in the human body has not lost its relevance for decades. One of these microelements is chromium. Given its ability to reduce oxidative stress and chronic inflammation in the human body, much attention is being paid to studying the role of chromium in the treatment of obesity and hypertension. A number of scientists in their studies have shown a positive effect of chromium supplementation in these diseases. However, a large number of unexplored questions remain. In particular, most of the studies are devoted to the study of isolated dis
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29

Zhan, Guo Feng, En Gang Wang, and Ji Cheng He. "Research on Casting of GH3030 Superalloy with Electromagnetic Stirring." Advanced Materials Research 146-147 (October 2010): 105–8. http://dx.doi.org/10.4028/www.scientific.net/amr.146-147.105.

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The effect of electromagnetic stirring on the inner quality and solidification microstructure of the GH 3030 superalloy ingots was investigated by casting experiments. As we know from the experiments, the solidification microstructure of GH3030 is the single-phase of austenite. With the electromagnetic stirring (EMS) the grains of the GH3030 ingots become finer significantly and the average grain size decrease as the currents of EMS increase. The results also show that the macrostructure of the ingots was improved significantly. The length of the shrinkage cavity with EMS become smaller and th
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30

Venier, P., A. Montaldi, L. Busi, C. Gava, L. Zentilin, G. Tecchio, V. Bianchi, and A. G. Levis. "Genetic effects of chromium tannins." Carcinogenesis 6, no. 9 (1985): 1327–35. http://dx.doi.org/10.1093/carcin/6.9.1327.

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31

Ghadi, A., Mansour Soltanieh, and H. R. Karimi Zarchi. "Effect of Salt Bath Composition on the Chromium Diffusion on Plain Carbon Steels by TRD Process." Defect and Diffusion Forum 326-328 (April 2012): 377–82. http://dx.doi.org/10.4028/www.scientific.net/ddf.326-328.377.

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The thermo-reactive diffusion (TRD) process is used for diffusing an element to the metallic steel substrate. TRD is carried out by using either salt bath or fluidized bed methods. In this research, the molten salt bath method is used. Ferro chromium was dissolved in the molten borax as the source of chromium in the salt. Samples of cylindrical shape of plain carbon steel with 10 mm diameter and 20 mm height were treated at 1000°C for 14 hours in different baths including either low carbon ferro chromium (LCFC) or high carbon ferro chromium (HCFC) powder. The purpose of this research is to inv
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32

Dong, Guo Ri, and Jian She Liu. "Effects of Cr3+ on Chromium Adsorption of SBR Activated Sludge System under Different Chromium Loads and Different Initial SVIs." Advanced Materials Research 838-841 (November 2013): 2735–38. http://dx.doi.org/10.4028/www.scientific.net/amr.838-841.2735.

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In allusion to Cr3+s toxic effect on activated sludge in SBR process system, by determination of the Cr3+adsorption rate, mlvss under different initial SVIs and different chromium loads, the Cr3+s toxic effect on activated sludge and the Cr3+s influence on chromium adsorption of activated sludge were studied. The research shows that within tolerance range, the activated sludge of SBR system can adsorb 60% chromium ion within 10min reaction. Moreover, with the increase of chromium load, the final chromium remnant rate decreases; within tolerance range, the increase of chromium load contributes
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33

Gochfeld, M., and C. Witmer. "A research agenda for environmental health aspects of chromium." Environmental Health Perspectives 92 (May 1991): 141–44. http://dx.doi.org/10.1289/ehp.9192141.

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34

Kashapov, L. N., N. F. Kashapov, and R. N. Kashapov. "Research of cobalt chromium alloy surface morphology after sandblasting." IOP Conference Series: Materials Science and Engineering 69 (December 11, 2014): 012017. http://dx.doi.org/10.1088/1757-899x/69/1/012017.

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35

Mertz, Walter. "Chromium Research from a Distance: From 1959 to 1980." Journal of the American College of Nutrition 17, no. 6 (December 1998): 544–47. http://dx.doi.org/10.1080/07315724.1998.10718801.

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36

Tingting, Huang. "Effect of the Temperature on chromium precipitation in faucets." E3S Web of Conferences 290 (2021): 01027. http://dx.doi.org/10.1051/e3sconf/202129001027.

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The research was studying the chromium precipitation in faucets which were extracted at ambient temperature of 20 ºC, 40 ºC and 60 ºC by extraction solution, the results showed that in general, the chromium extraction in the faucets increased as the temperature rises. And the chromium extraction in different batches and different samples in the same batch varied greatly, mainly affected by materials and the processing technology. After further analysis, the detection showed that Cr VI in chromium precipitation was between 83% and 103% of the total chromium content. This indicated that Cr VI wa
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37

Shang, Ling Ling, Ce Shi, Yong Li Zhang, and Yong Min Liu. "Research on Metal Ion Removal of Ceramic Printing Wastewater." Advanced Materials Research 664 (February 2013): 369–73. http://dx.doi.org/10.4028/www.scientific.net/amr.664.369.

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The removal of the metal ions in the ceramic printing wastewater was influenced by using, stirring and precipitating of the solution pH, coagulant PAC, coagulant aid PAM and heavy metal scavenger. This experiment investigated the removal effect of the metal ions in the wastewater under different conditions. Flame atomic absorption spectrometry was adopted for the determination of the concentration of metal ions in the wastewater. The studies have shown that alkalization, PAC coagulation treatment have a role in the removal of metal ions in the ceramic printing wastewater. And the chromium and
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38

Zhang, Bo, Wen Hai Chi, Pei Yang Shi, Cheng Jun Liu, and Mao Fa Jiang. "Study on the Clean Production Process of Basic Chromium Sulphate." Advanced Materials Research 887-888 (February 2014): 651–56. http://dx.doi.org/10.4028/www.scientific.net/amr.887-888.651.

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The pollution of chromium salt industry is increasingly serious in China and becomes a worldwide problem with the rapid development of chromium salt industry. Then a new clean production process with a high recovery rate of chromium and pollution-free was proposed according to the comprehensive summary of existing processes of basic chromium sulphate. Furthermore, a small amount of slag will be discharged in this short process with lower energy consuming. The design concept is also applicable to the preparation of other chromium salts products, which will eliminate the pollution of Cr6+ during
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THOMYASIRIGUL, SUREERAT, HITOSHI FUKUDA, JUN HASEGAWA, YOSHIYUKI OGURI, and CHAVALIT RATANATAMSKUL. "APPLICATION OF ION EXCHANGE PAPER TO PRECONCENTRATION OF CHROMIUM (III) AND CHROMIUM (VI) IN WATER FOR PIXE ANALYSIS." International Journal of PIXE 18, no. 01n02 (January 2008): 13–19. http://dx.doi.org/10.1142/s0129083508001296.

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The most important species of chromium (VI) formed in water are anions such as CrO 42-, whereas chromium (III) is mainly present in the form of cationic species such as Cr ( OH )2+. Pure water and tap water samples were artificially contaminated with mixture of chromium (VI) and chromium (III) standard solutions. Sequential filtration through commercially available Whatman P81 cellulose phosphate paper and Whatman DE81 DEAE cellulose paper was employed for separation and preconcentration of chromium (III) and chromium (VI) in these water samples, respectively. The PIXE measurements of these fi
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40

Mayzarah, Erikha Maurizka, Setyo Sarwanto Moersidik, and Lana Saria. "Control of Chromium Hexavalent (Cr -VI) Pollution on Waste Water in Nickel Ore Extraction Industry with Phytoremediation Technology." E3S Web of Conferences 68 (2018): 03011. http://dx.doi.org/10.1051/e3sconf/20186803011.

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The issue that surfaces from the digging of limonite and saprolite zones on nickel ore mining is the oxidation of chromium to chromium hexavalent. The aim of this research is to analyze the efficiency level of phytoremediation technology to reduce chromium hexavalent on waste water of nickel ore mining industry. This study was done in situ to observe the potential of Water Lettuce (Pistia stratiotes) using self-designed experimental devices.. This research was divided into three part, such as the variation of plant’s weight of 10grams, 20grams, 30grams, 60grams, 70grams, and 150grams with inte
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41

Salimin, Zainus, Faldy W. Satiyoaji, Dwi A. Prasetya, and Achmad Chafidz. "Chemical Treatment of Liquid Waste Generated from Leather Tannery Industry by Using Alum as Coagulant Material." Materials Science Forum 991 (May 2020): 178–84. http://dx.doi.org/10.4028/www.scientific.net/msf.991.178.

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The tannery industry generally produces trivalent chromium waste (Cr3 +) and hexavalent chromium (Cr6 +). This waste before being released into the environment must meet quality standards according to KEPMENLH no.51 / MENLH / 10/1995 concerning liquid quality standards for industrial activities which says the maximum total chromium content is 0.6 ppm. This study aims to reduce the levels of Chromium in waste produced by the leather tanning industry by using alum coagulants. This research uses simulation waste which is made based on the results of BPPT analysis of waste in the leather tanning i
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42

Gurumurthy Iyer, Vijayan. "Environmental health impact assessment of chrome composite leather-clad rollers used by Indian cotton roller ginning industries and design and development of Eco-friendly alternatives." International Journal of Emerging Trends in Health Sciences 4, no. 1 (April 30, 2020): 36–67. http://dx.doi.org/10.18844/ijeths.v4i1.4496.

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This research article realises the hazards of chromium contamination and pollution caused by using chrome composite leather-clad (CCLC) rollers that are commonly used in the cotton roller ginning industries and attempts to eliminate the chromium contamination and pollution during the cotton ginning process. The chromium traces found contain hexavalent chromium being adsorbed from chromium-contaminated lint, yarn, fabrics, seeds, by-products and textile effluent. Chromium acts in three ways on humans, viz. (i) local action explained as dermatitis or absorption through skin, (ii) direct inhalati
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43

Nriagu, Jerome, Stan Beaubien, and David Blowes. "Chemistry of chromium in lakes." Environmental Reviews 1, no. 2 (July 1, 1993): 104–20. http://dx.doi.org/10.1139/a93-009.

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The inputs of industrial wastes have changed the levels and forms of chromium in many lakes, and there is growing concern about the accumulation of Cr(VI), a known carcinogen, in drinking water supplies. This report provides a critical review of the effects of speciation, transformations, and solubility on the cycling of chromium in lacustrine environments. Unique features of chromium dynamics associated with the decoupling of redox-driven chromium cycle from those of iron and manganese at the sediment–water and air–water interfaces are highlighted. Reductive precipitation is important in the
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44

Setyaningsih, Yuliani, Indwiani Astuti, and Adi Heru Husodo. "Determinants Levels of Urinary 8-Hydroxydeoxyguanosine among Chromium Electroplating Workers." International Journal of Public Health Science (IJPHS) 5, no. 4 (December 1, 2016): 422. http://dx.doi.org/10.11591/ijphs.v5i4.4845.

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Electroplating workers were exposed by particulate and fog of chromium from electrolysis process during work. Chromium is highly carcinogenic when inhaled. Chromium can be reduced in the cells in the body. This process may generate Reactive Oxygen Species (ROS) causing lipid peroxidation and oxidative DNA damage. This research was aimed to analyse the influence of chromium to the levels of urinary 8-OHdG as an indicator to support early diagnosis of occupational disease. 66 electroplating workers in Tegal District were taken purposively as samples for this research. There were association betw
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45

Setyaningsih, Yuliani, Indwiani Astuti, and Adi Heru Husodo. "Determinants Levels of Urinary 8-Hydroxydeoxyguanosine among Chromium Electroplating Workers." International Journal of Public Health Science (IJPHS) 5, no. 4 (December 1, 2016): 422. http://dx.doi.org/10.11591/.v5i4.4845.

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Electroplating workers were exposed by particulate and fog of chromium from electrolysis process during work. Chromium is highly carcinogenic when inhaled. Chromium can be reduced in the cells in the body. This process may generate Reactive Oxygen Species (ROS) causing lipid peroxidation and oxidative DNA damage. This research was aimed to analyse the influence of chromium to the levels of urinary 8-OHdG as an indicator to support early diagnosis of occupational disease. 66 electroplating workers in Tegal District were taken purposively as samples for this research. There were association betw
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46

Yang, Jing Po, Fei Lu, Jian Mei Luo, and Jing Chen. "RFLP Analysis of Soil Microbial Diversity Chromium Contaminated Soil Remediation Process." Applied Mechanics and Materials 716-717 (December 2014): 1039–42. http://dx.doi.org/10.4028/www.scientific.net/amm.716-717.1039.

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Chromium contaminated soil restoration has been an important environmental restoration research. Changes of microbial diversity repair, repair tools can reflect the interaction with microbial interaction effect. The experiment uses a different repair methods chromium contaminated soil restoration for the study, using PCR-RFLP study the relationship between chromium contaminated soil remediation technology and changes in bacterial communities.
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Тюсенков, Антон, Anton Tyusenkov, Алексей Рубцов, Alexey Rubtsov, Камилла Мирхайдарова, and Kamilla Mirkhaidarova. "Pipe high-temperature strength research of pyrolysis furnace." Science intensive technologies in mechanical engineering 2018, no. 5 (April 19, 2018): 45–48. http://dx.doi.org/10.12737/article_5ad8d2928f4af3.41991916.

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The investigation results of the dependence of high alloy steel gas corrosion rate upon temperature are presented. Steel high corrosion-resistance is achieved at the introduction in steel alloy elements (chromium, aluminum, nickel). Steel 10C23N18 (a new sample and a sample from the furnace coil operated 6800h) and steel 10C17N13M2T at temperatures 500… 1000ºC were tested for heat-resistance.
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48

Rosanto, Yosaphat Bayu, W. Widjijono, and Teguh Triyono. "Pengaruh konsentrasi cobalt chromium pada uji hemolisis sebagai implan gigi." Majalah Kedokteran Gigi Indonesia 2, no. 3 (December 30, 2016): 116. http://dx.doi.org/10.22146/majkedgiind.10737.

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The effect of concentration of cobalt chromium in hemolysis test for dental implant. Dental implants are used to replace tooth/teeth loss and its function. Cobalt chromium has ideal characteristics to be made as dental implants material. It is required that the material to be implanted must be biocompatible with cells and tissues. One of biocompatibility characteristics is hemocompatibility. Hemocompatibility of materials can be observed with hemolysis test. Thus the purpose of this research is to know whether cobalt chromium as dental implants material affect the hemolysis of rabbit blood or
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Anggraeny, Dhea Try, Khothibul Umam Al Awwaly, and Abdul Manab. "Physicochemical Charastaristics of Leather Goat Quality from less Tanning Process." Journal of Environmental and Agricultural Studies 3, no. 3 (October 13, 2022): 39–49. http://dx.doi.org/10.32996/jeas.2022.3.3.5.

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This research is to determine the percentage of chromium and the type of solvent in terms of the physicochemical quality of wet blue and leather from the waterless tanning process. This research was carried out from November 2021 to February 2022 at the Laboratory of the Yogyakarta Center for Leather, Rubber, and Plastics. The research method used was a Nested Completely Randomized Design (CRD) with 2-factor nested patterns, Factor 1 is percentage of chromium (A = 3%, B = 4% and C = 5%) and factor 2 namely different types of solvents (L1 = Water, L2 = Ethanol and L3 = acetone) with 3 replicati
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50

Hołda, Anna. "Hexavalent Chromium Accumulation by Microscopic Fungi." Archives of Environmental Protection 39, no. 2 (June 1, 2013): 45–56. http://dx.doi.org/10.2478/aep-2013-0011.

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Abstract The purpose of the study was to optimize the removal of Cr(VI) by means of the Trichoderma viride strain isolated from chromium mud samples a well as the Aspergillus niger and Penicillium citrinum strains from other environments. The growth of organism and removal of chromium(VI) was carried out in water solution of various chromium(VI) contents. The research was carried out at optimal pH for each fungus i.e. Aspergillus niger 4.0, Penicillium citrinum 5.0 and Trichoderma viride 4.5. During 14 days of incubation, samples of 5 ml each were collected every day in order to determine chro
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