Chromite ore processing residues

James B.R. Hexavalent chromium solubility and reduction in alkaline soils enriched with chromite ore processing residue. J Environ Qual 1994 23 227-233. 

Burke T, Fagliano J, Goldoft M, et al. 1991. Chromite ore processing residue in Hudson County, New Jersey. Environ Health Perspect 92 131-137. 

Horowitz SB, Finley BL. 1993. Using human sweat to extract chromium from chromite ore processing residue Applications to setting health-based cleanup levels. J Toxicol Environ Health 40 585-599. 

Scott PK, Finley BL, Sung H-M, et al. 1997b. Identification of an accurate soil suspension/dispersion modeling method for use in estimating health-based soil cleanup levels of hexavalent chromium in chromite ore processing residues. J Air Waste Manage Assoc 47 753-765. 

Quantitative chromium solid-state speciation in chromite ore processing residue (COPR) has defined the mineral species and the processes controlling the retention and release of Cr(VI) from CO PR-contaminated sites (Hillier et al, 2003). Information that, used within a process-based modelling framework, has helped to predict the impact of changes in physicochemical conditions on the COPR, to test the extent to which the system may be considered at equilibrium and that, therefore, need to be considered within the context of informed remediation (Geelhoed et al, 2001). 

Chromium in Groundwater. Millions of tonnes of high-pH chromite ore processing residue (COPR) were deposited e.g. as landfill material) in the past in urban areas such as Glasgow, Scotland,and... 

One environmental concern is that around the world there are landfill areas where over the years chromite ore processing residues (COPR) have been dumped, and chromium from these landfills is being leached into the ground water. The environmental impact of chromium in soils and sediments is dependent on specia-tion and on the response of the matrix to biological and physico-chemical conditions. These factors control the mobilization of chromium from the solid into the aquatic phase and uptake and transfer into living systems (Hursthouse 2001). 

Farmer JG, Thomas RP, Graham MC, Geelhoed JS, Lumsdon DG and Paterson E (2002) Chromium speciation and fractionation in ground and surface waters in the vicinity of chromite ore processing residue disposal sites. J Environ Monit 4 235-243. 

Graham MC, Farmer JG, Anderson P, Paterson E, Hillier S, Lumsdon DG, Bewley RIF. (2006). Calcium polysulfide remediation of hexavalent chromium contamination from chromite ore processing residue. Science of the Total Environment 364 32-A4. 

Su C, Ludwig RD. (2005). Treatment of hexavalent chromium in chromite ore processing residue solid waste using a mixed reductant solution of ferrous sulphate and sodium dithionite. Environmental Science and Technology 39 6208-6216. 

Geochemical speciation Batch experiments ORCHESTRA Leaching of Cr(VI) from chromite ore processing residue [4]... 

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