Chromium ore processing residue (COPR) has been disposed at hundreds of sites in the US mid-Atlantic Region, including major transportation corridors, harbors, and facilities.Chromium in the soils contaminated by Chromite Ore Processing Residue from Qingdao Hongxing chemical plant. ESIAT,JJI,594-597. Further proven experiments showed that the process is Urum K, Pekdemir T, Ross 0, et aI. 2005.This was done in response to concerns voiced by the Hudson County community where most of the chrome ore processing residue waste sites are located. An internal DEP workgroup was formed and chaired by Eileen Murphy, Ph.D. (DSRT). A report was prepared in 2005 with the findings of the workgroup (see link below).Dec 11, 2007 Batch leaching studies on chromite ore processing residue (COPR) were performed using acids to investigate leaching of hexavalent chromium, Cr(VI), with respect to particle size, reaction time, and type of acid (HNO(3) and H(2)SO(4)). Aqueous Cr(VI) is maximized at approximately 0.04 mol Cr(VI) per kg of dry COPR at pH 7.6-8.1.
Apr 26, 2012 Conversion of Chromium Ore Processing Residue to Chrome Steel. GeoCongress 2008 Geotechnics of Waste Management and Remediation June 2012 . Diagenesis of Buried Chrome Ore Processing Residue. GeoCongress 2008 Geotechnics of Waste Management and Remediation June 2012 .Related abbreviations. The list of abbreviations related to COPR - Chromium Ore Processing Residue.Dec 04, 2018 The feasibility of extracting metals from chromium (Cr) ore processing residue (COPR) was investigated. COPR samples collected from four sites in New Jersey, USA (sites A, B, C and D) were mixed with 15 carbon by weight with different percentages of sand to neutralise the basic oxide in COPR and heated under a reducing environment to extract metals.Sequently, chromium contaminant in groundwater, chromium ore processing residue (COPR), and sediment represents a sig-niﬁcant environmental and public health concern . The U.S. EPA maximum contaminant level (MCL) for total chromium in water is 0.1mg L . Chromium in natural waters exists primarily in +3 and +6 valence states .
In methods for treatment of in ground chromium ore processing residue contamination, ferrous sulfide is provided as a substantially insoluble material in the residue deposit. The ferrous sulfide accordingly may remain substantially in place, in the pores of the soil or residue, even over long periods of time, regardless of underground water movement or diffusion.Chrome steel from chromium ore processing residue. Wiwat Kamolpornwijit, Jay N Abstract. In Hudson County, New Jersey, there are than two million tons of leftover chromite ore processing residues (COPR). The primary objective of this manuscript is to demonstrate an efficient and optimum way to recover chromium and iron from COPR in.Chromite ore processing residue (COPR) is a waste byproduct of chromate production that contains high levels of hexavalent chromium (Cr[VI]). Although the.May 01, 1991 Chromite ore processing residue occurs at over 130 sites in Hudson County, New Jersey. Many of these sites are in urban residential areas. This waste is a result of 70 years of chromate and bichromate chemical manufacturing. At least 15 of the sites contain total chromium concentrations greater than 10,000 mg kg, with hexavalent content ranging from.
In methods for treatment of in ground chromium ore processing residue contamination, ferrous sulfide is provided as a substantially insoluble material in the residue deposit. The ferrous sulfide accordingly may remain substantially in place, in the pores of the soil or residue, even over long periods of time, regardless of underground water.Description Chromite ore processing residue occurs at over 130 sites in Hudson County, New Jersey. Many of these sites are in urban residential areas. This waste is a result of 70 years of chromate and bichromate chemical manufacturing.Iron Ore Mining Process. processes of production on chromium. Case Study Chromite mining and processing. Chromium (III) compounds have some commercial uses, but chromium (VI) has the widest application due to its uses as an acid, oxidant, and as a colouring agent. Canada imported approximately 74,000 tonnes of chromium-containingn 1991.5.The leaching behavior of hexavalent chromium (Cr(VI)) and major metal elements relevant to Cr(VI) leaching from chromite ore processing residue (COPR) to HNO3 are investigated by batch leaching tests. According to the test results, aqueous Cr(VI) accounted for 70-80 of the content of total Cr. Cr(VI) concentration was controlled by the dissolution degree of Cr(VI).
Review Of Chromite Ore Processing Residue Copr Past. Chromite ore processing residue copr is a waste byproduct of chromate production that contains high levels of hexavalent chromium crvi although the high temperature chromite process was banned in several countries its legacy still exists at numerous contaminated sites for instance new jersey.Bility implications of bridges constructed in chromite ore processing residue (COPR) fill. The findings are based on visual inspection and various testing of 31 bridges, located in known chromium and nonchromium sites in and around Hudson County, New Jersey. Various.Batch leaching tests, qualitative and quantitative x-ray powder diffraction (XRPD) analyses, and geochemical modeling were used to investigate the leaching mechanisms of Cr(VI) from chromite ore processing residue (COPR) samples obtained from an urban area in.01 02 2017 In the process of chromium salt production, large amount of chromite ore processing residues (COPR) are generated (Zhang et al., 2009, Brose and James, 2013, Kameswari et al., 2015).
Chromium Ore Processing Residue. Chromite ore processing residue COPR poses a great environmental and health risk with persistent CrVI leaching To reduce CrVI and subsequently immobilize in the solid matrix COPR was incubated with nanoscale zerovalent iron nZVI and the CrVI speciation and leachability were studied.Chromite ore processing residue is an industrial waste material generated by the manufacturing of chromates for chromite ore. Chromium is present in the trivalent state in the ore as chromium iron oxide (FeCr204). In this state, the chromium is inert and is not soluble in either acid or water. To produce the hexavalent, water-soluble.T1 - Chromium steel from chromite ore processing residue - A valuable construction material from a waste. AU - Meegoda, Jay N. AU - Kamolpornwijit, Wiwat. N1 - Funding Information Acknowledgements The work described in this study was supported by a research contract from the New Jersey Department of Environmental Protection.Apr 06, 2007 Using human sweat to extract chromium from chromite ore processing residue applications to setting health-based cleanup levels. Horowitz SB, Finley BL. J Toxicol Environ Health, 40(4) 585-599, 01 Dec 1993 Cited by 6 articles PMID 8277520.