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首页> 外文期刊>Oriental Journal of Chemistry: An International Research Journal of Pure & Applied Chemistry >Acid Free Cr(VI) Reduction in Contaminated Ground Water Collected from Chromite Ore Processing Residue Dump Site
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Acid Free Cr(VI) Reduction in Contaminated Ground Water Collected from Chromite Ore Processing Residue Dump Site

机译：从铬铁矿矿石加工残留倾卸现场收集的酸性Cr（VI）减少污染的地下水

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摘要

Present study explore the possibility of reducing toxic Cr(VI) to Cr(III) without adding acid externally to the level of regulatory norms. Trial experiments were carried out with standard solution having Cr(VI) concentration of 1976 mg/L to reveal the suitability of SnCl2 for the reduction of Cr(VI) in the absence of mineral acid. Under the same conditions contaminated ground water from COPR dump site was examined. Complete reduction of Cr(VI) and level of total Cr to discharge limit were observed within fifteen min. for both simulated and contaminated water. This green chemistry approach and lower time duration for reduction is not reported earlier. The efficacy of the process is ascertained by analysing the other important heavy metals like Ni, Cu, Pb and Zn using AASP. Level of chloride, sulphate, BOD, TDS and pH of the treated water were also recorded. Results imply that SnCI2 effectively reduces Cr(VI) to Cr(III) in the absence of acid.
机译：目前的研究探讨了减少毒性Cr（vi）至Cr（iii）的可能性，而不在外部添加酸性到调节规范水平。 试验实验用具有1976mg / L的Cr（VI）浓度的标准溶液进行，以揭示SnCl2在没有无机酸的情况下减少Cr（VI）的适用性。 在相同的条件下，检查了来自COPR倾卸现场的污染地水。 在十五分钟内观察到完全减少Cr（vi）和总Cr的水平。 适用于模拟和受污染的水。 这种绿色化学方法和较低的减少持续时间较早报告。 通过使用AASP分析如Ni，Cu，Pb和Zn等其他重要的重金属来确定该方法的功效。 还记录了氯化物，硫酸盐，BOD，TDS和处理水的pH水平。 结果意味着SNCI2在没有酸的情况下有效地减少了Cr（vi）至cr（iii）。

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