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chromium ore processing residue

Stabilization of chromium ore processing residue (COPR ...

sequently, chromium contaminant in groundwater, chromium ore processing residue (COPR), and sediment represents a sig-nificant environmental and public health concern [9]. The U.S. EPA maximum contaminant level (MCL) for total chromium in water is 0.1mg/L [10]. Chromium in natural waters exists primarily in +3 and +6 valence states [11].

Chromite Ore Processing Residue (COPR): Hazardous ...

 · 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 …

Chromite Ore Processing Residue (COPR): Hazardous ...

Abstract. 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 …

Chromium Ore Processing Residue

Methods Of Treatment Of Chromite Ore Processing Residue. Nov 11, 2010nbsp0183321. 175. 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 …

Leaching of hexavalent chromium from young chromite ore ...

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,

A clean metallurgical process for vanadium precipitation ...

A chromium residue containing 4.8% V2O5 and 30.2% Cr was obtained from a wastewater treatment plant. The leaching of vanadium from this residue using H2SO4, NaOH or Na2CO3 was trialled.

Chromite ore processing residue in Hudson County, New ...

 · 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.

New Jersey Department of Environmental Protection Chromium ...

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).

EIG Webinar: David Cragg

 · Extractive Industry Geology (EIG) webinar on ''Chromium Ore Processing Residue: Tackling a legacy of land contamination in East Glasgow'' by David Cragg from A...

FACTS ABOUT: CHROMIUM

 · Chromium ore processing residue (COPR) was used as fill on sites in the Baltimore area. Chromium can be a liquid, solid, or gas, and it can exist in several different chemical forms. The most common forms are chromium(0), chromium(III), and chromium(VI), also called hexavalent chromium. No taste or odor is associated with chromium compounds.

Remediation of chromite ore processing residue by ...

 · 1. Introduction. Chromite ore processing residue (COPR) is the solid residue produced by high lime process and classified as a hazardous waste for having 1–2% hexavalent chromium [Cr(VI)] (Kowalski and Gollinger-Tarajko, 2003) is reported that 2–3 tons COPR is generated in the production of 1 ton sodium dichromate by the high lime process (Ding, 1994, Ji, 2003, Walawska and …

Chrome Steel from Chromium Ore Processing Residue | Geo ...

 · 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 …

chromite ore processing residue

Conversion of Chromium Ore Processing Residue to Chrome Steel. 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.

Chromium steel from chromite ore processing residue — A ...

 · Burke T, Fagliano J, Goldoft M, Hazen R E, Tglewicz R, Mckee T. Chromite ore processing residue in Hudson County, New Jersey. Environmental Health Perspectives, 1991, 92(5): 131–137. Article CAS Google Scholar 3. Kamolpornwijit W. Feasibility study to extract iron and chromium from chromium contaminated soils.

Baltimore Chromium Residue Cleanup

 · Area 1501/1602 is a 17-acre area that was filled with Chromium Ore Processing Residue (COPR). The area was constructed with a perimeter clay dike, underlying clay liner and covered or capped with asphalt pavement and additional material on top. Currently the area is used by the Maryland Port Administration to store cargo.

(PDF) A Review of Chromite Ore Processing Residue (COPR ...

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 ...

chromium ore processing residue

Conversion of Chromium Ore Processing Residue to Chrome . During the chromate extraction process, varying amounts of lime and soda ash were added and roasted with pulverized chromite ore to a temperature between 1100ºC and 1150ºC under an oxidizing environment Trivalent chromium in chromite ore was oxidized to hexavalent chromium The highly soluble hexavalent chromium was …

Characterization of chromite ore processing residue — New ...

Abstract. 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 preliminary magnetic separation. COPR from nine hazardous waste sites in Hudson County, N.J., were analyzed using nondestructive instruments including ...

CLU-IN | Contaminants > Chromium VI > Treatment Technologies

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. Bewley Science of The Total Environment, Volume 364, Issues 1-3, 1 July 2006, Pages 32-44

AdsorptionCharacteristicransportBehaviorofCr(VI)in ...

 · ResearchArticle AdsorptionCharacteristicransportBehaviorofCr(VI)in ShallowAquifersSurroundingaChromiumOreProcessing Residue(COPR)Dumpsite YuLiu,1,2YinLi ...

TeamRiver-RiskAssessment week 2 (1).docx

The Chromite Ore Processing Residue (COPR) and the testing and evaluation of the site, risk assessments, and remediation have had costs and benefits occur from the years 1976 to 2001. Some of the management decisions were deciding on if the sites were worth the cost of remediation and the adverse effects that could potentially cause harmful ...

Conversion of Chromium Ore Processing Residue to Chrome …

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 ...

Stabilization of chromium ore processing residue (COPR ...

 · Chromium has been classified as a potential carcinogen, and has high and acute toxicity to humans, animals, plants, and microorganisms. Consequently, chromium contaminant in groundwater, chromium ore processing residue (COPR), and sediment represents a significant environmental and public health concern .

Chromium Ore Processing Residue

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.

Some studies on recovery of chromium from chromite ore ...

in chromite ore and as chromium iron c xide (FeCr04). In this form, chromium is inert. It is not bio-available on account of poor solubility. Dressing ~of chromium involves the oxidation of chromiu (Ill) into chromium(VI{ Major chemi~al reaction.- asso_ciated with the processing of chrom1te ore …

Evaluation of chromium bioaccessibility in chromite ore ...

 · Evaluation of chromium bioaccessibility in chromite ore processing residue using in vitro gastrointestinal method. Yu S(1), Du J, Luo T, Huang Y, Jing C. Author information: (1)State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.

(PDF) Study on process conditions of Chromite Ore ...

Abstract Using distilled water as washing agent, the process conditions for removal of hexavalent chromium from Chromite Ore Processing Residue (COPR) contaminated soils were discussed in the paper, including the solid-liquid ratio, cleaning time,

Methods of Treatment of Chromite Ore Processing Residue

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 ...

(PDF) A Review of Chromite Ore Processing Residue (COPR): Past P…

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

The leaching characteristics of chromite ore processing ...

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

Chromite Ore Processing Residue in Hudson County, New …

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

Chromite Ore Processing Residue in Hudson County, New Jersey

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

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 (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.

Treatment of in ground chromium ore processing residue ...

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 ...

EIG Webinar: David Cragg

Extractive Industry Geology (EIG) webinar on ''Chromium Ore Processing Residue: Tackling a legacy of land contamination in East Glasgow'' by David Cragg from A...

Chromium Ore Processing Residue

Conversion of Chromium Ore Processing Residue to Chrome Steel. Trivalent chromium in chromite ore was oxidized 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

Jersey City Chromium Cleanup — On-site Work

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. The remediation also addressed non-chromium contaminants, primarily lead, that …

Adsorption Characteristics and Transport Behavior of Cr(VI ...

This study explored the stratigraphic distribution and soil/shallow aquifer characteristics surrounding a chromium ore processing residue (COPR) dumpsite at a former chemical factory in China. Total Cr levels in top soils (5–10 cm) nearby the COPR dumpsite were in the range of 8571.4–10711.4 mg/kg. Shallow aquifers (1–6 m) nearby the COPR dumpsite showed a maximum total Cr ...

Characterization of Chromite Ore Processing Residue ...

 · 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 preliminary magnetic separation.