Calcium polysulfide remediation of hexavalent chromium contamination from chromite ore processing residue

• Published in: The Science of the total environment Vol. 364; no. 1; pp. 32 - 44
• Main Authors: Graham, Margaret C., Farmer, John G., Anderson, Peter, Paterson, Edward, Hillier, Stephen, Lumsdon, David G., Bewley, Richard J.F.
• Format: Journal Article
• Language: English
• Published: Shannon Elsevier B.V 01.07.2006; Elsevier Science
• Subjects: Applied sciences; Calcium Compounds - chemistry; Calcium polysulfide; Carcinogens, Environmental - chemistry; Chromium - chemistry; COPR; Earth sciences; Earth, ocean, space; Engineering and environment geology. Geothermics; Exact sciences and technology; Groundwater; Groundwaters; Hexavalent chromium; Industrial Waste - analysis; Metallurgy; Natural water pollution; Pollution; Pollution, environment geology; Remediation; Scotland; Sulfides - chemistry; Thiosulfates - chemistry; Waste Disposal, Fluid - methods; Water Pollutants, Chemical - analysis; Water Supply - analysis; Water treatment and pollution; United Kingdom; Scotland; Great Britain; Europe; British Isles, Scotland, Glasgow; Hexavalent chromium; COPR; Remediation; Groundwater; Calcium polysulfide; Calcium Polysulfides; Reducing agent; Chromates; Heavy metal; Chemical reduction; Industrial waste; Decontamination; Solid waste; Water pollution; Mining industry; Chromium VI; Ground water

Past disposal of high-lime chromite ore processing residue (COPR) from a chemical works in S.E. Glasgow, UK, has led to continuing release of toxic and carcinogenic hexavalent chromium (Cr(VI)) to groundwaters which are highly contaminated with Cr(VI)O 4 2−. Traditional methods of remediating Cr(VI)...