Simultaneous oxidation of Cr III and extraction of Cr VI …

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

COPR - Chromite Ore Processing Residue - All Acronyms

26 2 2013· Effect of iron II sulfate addition on chromium VI leaching from columns of chromite ore processing residue Environ Sci Technol 37 3206 3213 CrossRef Google Scholar Graham MC Farmer JG Anderson P Paterson E Hillier S Lumsdon DG Bewley RJ 2006 Calcium polysulfide remediation of hexavalent chromium contamination from chromite ore processing residue

Chromite ore processing residue in Hudson County New …

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

Chromite ore processing residue in Hudson County New …

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

Chromium Remediation or Release Effect of Iron II …

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

Modeling Chromium Dissolution and Leaching from …

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 August 2006

PDF A Review of Chromite Ore Processing Residue …

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 expires

Simultaneous oxidation of Cr III and extraction of Cr VI …

Indian Journal of Chemistry Vol 42A September 2003 pp 2447-2454 Some studies on recovery of chromium from chromite ore processing residues K J Sreeram M K Tiwarib T Ramasami Chemical Laboratory Central Leather Research Institute Adyar

Methods of Treatment of Chromite Ore Processing …

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

Some studies on recovery of chromium from chromite ore …

Long-term leaching characteristics of chromium ore processing residue COPR ≈ 250 pore volumes of flow PVF was investigated using laboratory flow-through column testing with synthetic

Biotreatment of chromite ore processing residue by …

11 11 2010· 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

how to chromite ore processing facility

What is the abbreviation for Chromite Ore Processing Residue What does COPR stand for COPR abbreviation stands for Chromite Ore Processing Residue Most Popular APA All Acronyms 2020 COPR - Chromite Ore Processing Residue Retrieved February

Chromium Cleanup Partnership

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

Speciation and recovery of chromium from chromite ore …

18 6 2018· The important ore of chromium is Chromite or chrome ore FeO Cr2 O3 The chief ore of chromium is chromite ore Extraction of chromium metal from chromite ore The extraction of chromium metal from

Chromite Ore Processing Residue COPR Hazardous …

Accurate analysis of water retention curves WRCs for industrial and mining residuals such as chromium ore processing residue COPR is required to predict the unsaturated transport of hazardous contaminants e g hexavalent chromium in the vadose zone as

Conversion of Chromium Ore Processing Residue to Chrome Steel

In Hudson County New Jersey there are more than two million tons of leftover chromite ore processing residues COPR Part of COPR was used as construction fill materials spreading the problem to a larger area High solubility of some chromate compounds

Baltimore Chromium Residue Cleanup - Dundalk Marine …

1 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

Review of Chromite Ore Processing Residue COPR Past …

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

Chrome Steel from Chromium Ore Processing Residue …

Abstract Batch tests were conducted to assess the potential use of ferrous sulfate and calcium polysulfide for the remediation of chromite ore processing residue COPR The remediation process entails addition of ferrous sulfate or calcium polysulfide to chemically

PDF Leaching Mechanisms of Cr VI from Chromite Ore …

1 Introduction Chromite ore processing residue COPR is commonly produced as the byproduct in the manufacture of chromates and dichromates by chromite-ore high-lime roasting technique The residue that still contains a significant amount of chromium Cr VI

Evaluation of Bimodal Water Retention Characteristics for …

For understanding both the environmental behavior and developing remediation treatments for chromium ore processing residue COPR it is important to identify all the potentially soluble sources of Cr VI Hydrogarnet has been identified as a major phase in COPR

US7670576B2 - Methods of treatment of chromite ore …

Chromite ore processing residue COPR derived from the so-called high lime processing of chromite ore contains high levels of Cr III and Cr VI and has a pH between 11 and 12 Ferrous sulfate which is used for remediation of Cr VI contamination in wastewater

Adsorption Characteristics and Transport Behavior of Cr VI …

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

Hydrogarnet A Host Phase for Cr VI in Chromite Ore …

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 Jersey City and New Jersey Department of

Leaching Mechanism of Cr VI from Chromite Ore …

The processing of chromite ore is associated with the generation of large quantities of solid wastes containing chromium which have been disposed of as landfill for many years The mobilization and operational speciation of chromium contained in soils

Extraction of Chromium Metal from Chromite Ore …

In this work a series of long-term treatment trials were conducted to evaluate the remediation performance of amorphous iron pyrite FeS 2 am toward hexavalent chromium Cr VI in chromite ore processing residue COPR The effectiveness of FeS 2 am was assessed using alkaline digestion the synthetic precipitation leaching procedure SPLP and the physiologically based extraction test PBET

New Jersey Department of Environmental Protection …

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

Reduction and immobilization of hexavalent chromium in …

Conversion of Chromium Ore Processing Residue to - CLU-IN During that period chromate Cr6 was produced from chromite ore at three facilities in Hudson County NJ Iron Ore Processing for the Blast Furnace processing facility located on the Mesabi Iron

Chromium Ore Processing Residue - Maryland

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

Remediation of chromite ore processing residue using …

1 Introduction Chromite ore processing residue COPR is commonly produced as the byproduct in the manufacture of chromates and dichromates by chromite-ore high-lime roasting technique The residue that still contains a significant amount of chromium Cr VI

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