Review of Chromite Ore Processing Residue (COPR): Past Practices, Environmental Impact and Potential Remediation Methods

Author(s): Kevin Freese, Robert Miller, Teresa J. Cutright, John Senko.

Journal Name: Current Environmental Engineering
Continued as Current Environmental Management

Volume 1 , Issue 2 , 2014

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Chromite ore processing residue (COPR) is a waste byproduct of chromate production that contains high levels of hexavalent chromium (Cr[VI]). Although the high temperature chromite process was banned in several countries, its legacy still exists at numerous contaminated sites. For instance, New Jersey alone has over 2 million tons of waste COPR. Legacy sites are confounded by the fact that a few countries still produce COPR during chromate extraction that leads to new contamination. This paper reviews the historical production and disposal practices of COPR and provides a concise overview of the different methods for addressing Cr(VI) contamination at old and new COPR sites.

Keywords: COPR, Cr(VI), chromate, ettringite, remediation.

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Article Details

Year: 2014
Page: [82 - 90]
Pages: 9
DOI: 10.2174/221271780102141117101551

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