use of tartaric acid and isopropyl alcohol in the reduction of hexavalent chromium and application to chromium contaminated soils and chromite ore processing residue View Open Brose umd 0117E 13123 pdf 2 308Mb
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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
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Conversion of Chromium Ore Processing Residue to Chrome Steel Introduction Chromium played an important role in the industrial development of New Jersey from 1905 to 1971 During that period chromate Cr6 was produced from chromite ore at three facilities in Hudson County NJ
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Chromium Ore Processing Residue COPR Site Initiative Background and Site Location The reduction of chrome bearing ores in the production of industrial grade chromium compounds results in a waste rich in metals contamination This byproduct is variously referred to as chromite ore processing
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Approximately 40 of the material produced at the processing plant was used to support U S military operations during World War II From the early 1900s to 1954 the Mutual Chemical Company used Site 441 Route 440 to dispose of a manufacturing by product called Chrome Ore Processing Residue or COPR pronounced ko per
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It has been shown that EPA Method 3060A does not adequately extract Cr VI from chromium ore processing residue COPR We modified various parameters of EPA 3060A toward understanding the transformation of COPR minerals in the alkaline extraction and improving extraction of Cr VI from NIST SRM 2701 a standard COPR contaminated soil
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The speciation and distribution of Cr VI in the solid phase was investigated for two types of chromite ore processing residue COPR found at two deposition sites in the United States gray black GB granular and hard brown HB cemented COPR COPR chemistry and mineralogy were investigated using micro X ray absorption spectroscopy and micro X ray diffraction complemented by laboratory
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Dermatas D Bonaparte R Chrysochoou M and Moon H ChromiteOre Processing Residue COPR Hazardous Contaminated Soil or Solid Waste Journal of ASTM International Vol 3 No 7 pp 1 10 Chromite ore processing residue COPR which contains hexavalent chromium Cr6 at concentrations typically in the range of thousands of milligrams kilograms was deposited over a
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The present invention relates to a process for simultaneous recovery of chromium and iron from Chromite Ore Processing Residue COPR and more particularly the present invention relates to an economical and environment friendly process for recovering chromium as a chromate salt and iron as an iron salt from non leachable Chromite Ore Processing Residue and avoids landfilling of toxic metals
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Introduction Chromite ore processing residue COPR is produced during the manufacture of chromates and dichromates as described by Alderson et al 1981 and Breeze 1973 These residues have high concentrations of chromium and other potentially harmful elements such as aluminium
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· Diagenesis of Buried Chrome Ore Processing Residue GeoCongress 2008 Geotechnics of Waste Management and Remediation June 2012 The Assessment and Remediation of Chromite Ore Processing Residue at Former Disposal Sites Glasgow Scotland Current Status 2007
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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
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This paper summarizes the characteristics of chromite ore processing residue COPR in terms of their chemical compositions phases and recycling potential of iron and chromium through
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Chromite ore processing residue COPR is generated as a by product of the chromite ore Mg Fe Cr Al Fe 2 O 4 processing to isolate and extract chromium The ore is mixed with quicklime and soda ash and roasted at high temperature ∼1200 °C
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Neighborhood Sampling Results Neighborhood Soil and Groundwater Sampling Results show there is no indication of COPR in any of the samples Honeywell is working with the Maryland Port Administration MPA to clean up Chromium Ore Processing Residue or COPR at the Dundalk Marine Terminal
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Methods to reduce hexavalent chromium Cr VI in chromite processing wastes include one or more of the following steps contacting the chromite processing wastes with an oxygen scavenger or chemical reducer permitting the chromite processing wastes to react with the oxygen scavenger or chemical reducer contacting the chromite processing wastes with ferrous ion contacting the chromite
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· Chromium has been widely used in many industrial applications As a result of chromite ore processing large amounts of chromite ore processing residue COPR material that can be classified as hazardous have been produced and released into the environment
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Extensive investigations identified chromium in soils and groundwater that exceed New Jersey criteria From the 1900s until the 1970s a chrome manufacturing by product called chrome ore processing residue was used as fill in parts of Jersey City including the Route 440 properties
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For many years prior to 1963 chromite ore processing residue was used as fill in construction projects 1976 Chromite ore processing in Hudson County ends During its lifetime Hudson County s chrome industry generated approximately 2 million tons of residue which was later determined to be a hazardous material 1982
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Leaching of hexavalent chromium from young chromite ore processing residue Katrin Matern1 Harald Weigand2 Ruben Kretzschmar3 Tim Mansfeldt1 1Faculty of Mathematics and Natural Sciences Dep of Geosciences Institute of Geography Univ of Cologne Albertus Magnus Platz Köln D 50923 Germany 2ZEuUS THM Univ of Applied Sciences
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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
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ore processing processing residue Prior art date 2004 09 10 Legal status The legal status is an assumption and is not a legal conclusion Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed Active Reinstated expires 2026 04 25 Application number US11 578 621 Other versions
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apply to chromium ore processing residue COPR waste sites in New Jersey The workgroup was comprised of experts from various programs of the Department one representative from the NJ Department of Health and Senior Services and one
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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
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It has been shown that EPA Method 3060A does not adequately extract Cr VI from chromium ore processing residue COPR We modified various parameters of EPA 3060A toward understanding the transformation of COPR minerals in the alkaline extraction and improving extraction of Cr VI from NIST SRM 2701 a standard COPR contaminated soil Aluminum and Si were the major elements dissolved
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· 1 1 75 canceled 76 A method for reducing chromium VI in an underground deposit of chromium ore processing residue comprising injecting a ferrous liquid into the underground deposit of chromium ore processing residue with the underground deposit comprising solid residue particles and with pore spaces between particles with the ferrous liquid reducing the pH of the pore water to
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· Chromite ore processing residue COPR which contains hexavalent chromium Cr 6 at concentrations typically in the range of thousands of milligrams kilograms was deposited over a timeframe of 50 years as fill at a site referred to as SA7 in New Jersey Significant surface heaving associated with COPR weathering induced mineralogical expansion has been observed at the site
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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
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Specific gravity tests were performed on chromium ore processing residue COPR an expansive industrial byproduct of the historical processing of chromite ore to determine if the complexity and heterogeneity of the particle microstructure may cause erroneous specific gravity results using ASTM D854 06 Method B as the baseline procedure
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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 types of observed deterioration of the concrete bridge substructures are
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Chromium processing at the former Baltimore Works plant in the Inner Harbor produced chromium ore processing residue COPR COPR from the Baltimore site was used as a fill material in certain areas around the harbor primarily at the Dundalk Marine Terminal
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Conversion of Chromium Ore Processing Residue to Chrome Steel December 2007 Full Report Chromium Moratorium is Lifted February 2007 Memorandum from DEP Commissioner Jackson Chromium Directive FAQs Chromium Soil Sampling Study August 2006 June 2011
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to hexavalent chromium The highly soluble hexavalent chromium was then removed from the COPR left over Chromium Ore Processing Residue leaving un oxidized trivalent chromium and slow dissolving hexavalent chromium compounds Burke et al 1991 In the absence of information on the toxicity of hexavalent chromium COPR was subsequently used
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· 1998 In Situ Reduction of Hexavalent Chromium in Alkaline Soils Enriched with Chromite Ore Processing Residue Journal of the Air Waste Management Association Vol 48 No 11 pp 1100 1106
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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
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