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首页> 外文期刊>Journal of Chemical Technology & Biotechnology >Electrolytic removal of hexavalent chromium from aqueous solutions
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Electrolytic removal of hexavalent chromium from aqueous solutions

机译:电解去除水溶液中的六价铬

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The removal of hexavalent chromium from a synthetic solution and from an industrial sample by electrolysis using stainless steel plate and titanium mesh cathodes is studied. It is found that the process proceeds in two steps: (1) electroreduction of hexavalent chromium to trivalent chromium in highly acidic medium and (2) electrochemical precipitation of trivalent chromium in an alkaline medium. A comparative study of electroreduction, electrochemical reduction and chemical reduction of hexavalent chromium is carried out and the electroreduction process is shown to be a clean technique. It is concluded that, in the absence of addition of any chemical as reducing agent, the Cr(III) solution formed on the reduction of Cr(VI) can be recycled in other industrial processes. (C) 2003 Society of Chemical Industry.
机译:研究了使用不锈钢板和钛网阴极通过电解从合成溶液和工业样品中去除六价铬的方法。发现该过程分两个步骤进行:(1)在高酸性介质中将六价铬电还原为三价铬;(2)在碱性介质中电化学沉淀三价铬。对六价铬的电还原,电化学还原和化学还原进行了比较研究,并且电还原过程被证明是一种清洁的技术。结论是,在不添加任何化学物质作为还原剂的情况下,在还原Cr(VI)时形成的Cr(III)溶液可以在其他工业过程中循环使用。 (C)2003年化学工业协会。

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