In the case of chromium, the metal precipitates as chromium hydroxide. Our remotox is used around the world routinely for remediation of excavation sites. An environmental cleanup project at NSF Dahlgren, contaminated soil at a former chemical waste evaporation pond was removed and the site was further excavated to expose the groundwater table to allow application of a calcium polysulfide solution to assist in remediating groundwater contaminated with elevated levels of hexavalent chromium*. ADS Classic is now deprecated. Calcium polysulfide remediation of hexavalent chromium contamination from chromite ore processing residue (Abstract) Margaret C. Graham, John G. Farmer, Peter Anderson, Edward Paterson, Stephen Hillier, David G. Lumsdon and Richard J.F. This page will automatically redirect to the new ADS interface at that point. U.S. Navy photo. Research output: Contribution to journal › Article Bewley Science of The Total Environment, Volume 364, Issues 1-3, 1 July 2006, Pages 32-44 [Margaret C Graham, John G Farmer, Peter Anderson, Edward Paterson, Stephen Hillier, David G Lumsdon, Richard J F Bewley] PMID 16442591 Calcium polysulfide remediation of hexavalent chromium contamination from chromite ore processing residue. Chromium, zinc, copper, lead, cadmium, mercury and arsenic are among the most common metal contaminants found at remediation sites. Remotox® (a Calcium Polysulfide Solution) precipitates these highly soluble metals as less soluble, less toxic metal sulfides. Anaerobically, the rate of Cr(VI) reduction by CPS increases with decreasing pH and is maximum in acidic environment. In the presence of oxygen, CPS reduction of Cr(VI) is fastest at neutral pH. In oxic acidic soils it adsorbs on iron and aluminum oxyhy- Assessment of calcium polysulfide for the remediation of hexavalent chromium in chromite ore processing residue (COPR) Author links open overlay panel Mahmoud Wazne a Santhi Chandra Jagupilla a Deok Hyun Moon a Sarath Chandra Jagupilla a Christos Christodoulatos a Min Gyu Kim b DOI: 10.1016/j.scitotenv.2005.11.007. Hepure is a premier calcium polysulfide supplier. Calcium polysulfide remediation of hexavalent chromium contamination from chromite ore processing residue. [Mahmoud Wazne, Santhi Chandra Jagupilla, Deok Hyun Moon, Sarath Chandra Jagupilla, Christos Christodoulatos, Min Gyu Kim] PMID 17276597 Science of The Total Environment 2006, 364 (1-3) , 32-44. Treatability Test Report for Calcium Polysulfide in the 100-K Area Petersen, S. and K. Hedquist DOE, DOE/RL-2006-17, 138 p, 2006 This report describes a demonstration of using calcium polysulfide to reduce hexavalent chromium in an aquifer with the precipitate being a chromium hydroxide. Recent reports in the USA showed that calcium polysulfide (CaS x) was effective in converting Cr(VI) to Cr ... J.A. Assessment of calcium polysulfide for the remediation of hexavalent chromium in chromite ore processing residue (COPR).
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