A review of chemical, electrochemical and biological methods for aqueous Cr(VI) reduction

Carlos E. Barrera-Diaz; Violeta Lugo-Lugo; Bryan Bilyeu

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A review of chemical, electrochemical and biological methods for aqueous Cr(VI) reduction

机译：Cr（VI）水溶液还原的化学，电化学和生物学方法综述

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Hexavalent chromium is of particular environmental concern due to its toxicity and mobility and is challenging to remove from industrial wastewater. It is a strong oxidizing agent that is carcinogenic and mutagenic and diffuses quickly through soil and aquatic environments. It does not form insoluble compounds in aqueous solutions, so separation by precipitation is not feasible. While Cr(VI) oxyanions are very mobile and toxic in the environment, Cr(III) cations are not. Like many metal cations, Cr(III) forms insoluble precipitates. Thus, reducing Cr(VI) to Cr( III) simplifies its removal from effluent and also reduces its toxicity and mobility. In this review, we describe the environmental implications of Cr(VI) presence in aqueous solutions, the chemical species that could be present and then we describe the technologies available to efficiently reduce hexavalent chromium.

机译：六价铬由于其毒性和移动性而特别引起环境问题，并且很难从工业废水中去除。它是一种强氧化剂，具有致癌性和致突变性，可在土壤和水生环境中快速扩散。它不会在水溶液中形成不溶性化合物，因此通过沉淀分离是不可行的。 Cr（VI）含氧阴离子在环境中非常易移动且有毒，而Cr（III）阳离子则不然。像许多金属阳离子一样，Cr（III）形成不溶的沉淀物。因此，将Cr（VI）还原为Cr（III）可以简化从废水中的去除，并降低其毒性和迁移率。在这篇综述中，我们描述了水溶液中Cr（VI）的存在对环境的影响，可能存在的化学物质，然后描述了可有效还原六价铬的可用技术。

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来源
《Journal of Hazardous Materials》 |2012年第15期|p.1-12|共12页
作者
Carlos E. Barrera-Diaz; Violeta Lugo-Lugo; Bryan Bilyeu;
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作者单位

Centro Conjunto de Investigation en Quimica Sustentable UAEM - UNAM, Carretera Toluca-Atlacomulco, km 14.5, Unidad El Rosedal, C.P. 50200, Toluca, Estado de Mexico, Mexico;

Centro Conjunto de Investigation en Quimica Sustentable UAEM - UNAM, Carretera Toluca-Atlacomulco, km 14.5, Unidad El Rosedal, C.P. 50200, Toluca, Estado de Mexico, Mexico,Direction de Mecatronica y Siscemas Productivos, Universidad Tecnologica del valle de Toluca, Carretera del Departamento del D.F. km 7.5, Ejido de Santa Maria Atarasquillo,Lerma, Mexico;

Department of Chemistry, Xavier University of Louisiana. Drexel Drive, Box 22, New Orleans. LA 70125, USA;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种 eng
中图分类
关键词
chromium; electroreduction; photocatalytic reduction; biological reduction; wastewater treatment;

机译：铬;电还原光催化还原;生物还原废水处理;

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A review of chemical, electrochemical and biological methods for aqueous Cr(VI) reduction

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