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Hexavalent Chromium Reduction with Zero-Valent Iron (ZVI) in Aquatic Systems

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Abstract

Hexavalent chromium is a heavy metal used in a variety of industrial applications which is highly toxic to humans, animals, plants and microorganisms. Moreover, it is a well-established human carcinogen by the inhalation route of exposure and a possible human carcinogen by the oral route of exposure. Therefore, it should be removed from contaminated waters. Its reduction to trivalent chromium can be beneficial because a more mobile and more toxic chromium species is converted to a less mobile and less toxic form. During the last two decades, there has been important interest in using zero-valent iron (ZVI) as a Cr(VI)-reducing agent. A considerable volume of research has been carried out in order to investigate the mechanism and kinetics of Cr(VI) reduction with ZVI, as well as the influence of various parameters controlling the reduction efficiency. Therefore, the purpose of this review was to provide updated information regarding the developments and innovative approaches in the use of ZVI for the treatment of Cr(VI)-polluted waters.

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Acknowledgements

The author gratefully acknowledges the CNCSIS-UEFISCDI for financial support that made this research possible. This research was conducted under PN II Exploratory Research Project no. 647/19.01.2009 “Innovative technologies for the removal of hexavalent chromium from wastewaters by reuse of scrap iron”, CNCSIS code 1031/2008. The manuscript was improved by the insightful comments of anonymous reviewers.

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  1. Faculty of Industrial Chemistry and Environmental Engineering, “Politehnica” University of Timisoara, Bd. V. Parvan Nr. 6, Et. 4, 300223, Timisoara, Romania

    Marius Gheju

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Gheju, M. Hexavalent Chromium Reduction with Zero-Valent Iron (ZVI) in Aquatic Systems. Water Air Soil Pollut 222, 103–148 (2011). https://doi.org/10.1007/s11270-011-0812-y

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