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Chromium Ore Processing Residue

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 alone has over 2 million tons of waste COPR

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  • In Situ Reduction of Hexavalent Chromium in Alkaline Soils
    In Situ Reduction of Hexavalent Chromium in Alkaline Soils

    Dec 27 2011 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 11001106

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  • Adsorption Characteristics and Transport Behavior of CrVI
    Adsorption Characteristics and Transport Behavior of CrVI

    This study explored the stratigraphic distribution and soilshallow aquifer characteristics surrounding a chromium ore processing residue COPR dumpsite at a former chemical factory in China Total Cr levels in top soils 510 cm nearby the COPR dumpsite were in the range of 85714107114 mgkg Shallow aquifers 1x20136x2009m nearby the COPR dumpsite showed a maximum total Cr

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  • Leaching mechanisms of CrVI from chromite ore processing
    Leaching mechanisms of CrVI from chromite ore processing

    Batch leaching tests qualitative and quantitative xray powder diffraction XRPD analyses and geochemical modeling were used to investigate the leaching mechanisms of CrVI from chromite ore processing residue COPR samples obtained from an urban area in Hudson County New Jersey The pH of the leaching solutions was adjusted to cover a wide range between 1 and 125

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  • PDF Chromite Ore Processing Residue in Hudson County
    PDF Chromite Ore Processing Residue in Hudson County

    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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  • Review of Chromite Ore Processing Residue COPR Past
    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 alone has over 2 million tons of waste COPR

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  • Leaching of hexavalent chromium from young chromite ore
    Leaching of hexavalent chromium from young chromite ore

    34 Extractable chromate and chromium oxidation state in the chromite ore processing residue solid phase Table 2 summarizes the extractable amounts of CrO 4 2 and the ratio of CrVICr total in the COPR as determined by Xray absorption near edge structure XANES spectroscopy Supplemental Figures S5 and S6

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  • what is the ore of chromium
    what is the ore of chromium

    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 Get price Chromite The only mineral ore of chromium metal Chromium is not mined in the United States The chromium consumed by United States industry comes from A other

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  • Leaching Mechanism of CrVI from Chromite Ore Processing
    Leaching Mechanism of CrVI from Chromite Ore Processing

    The leaching behavior of hexavalent chromium CrVI and major metal elements relevant to CrVI leaching from chromite ore processing residue COPR to HNO3 are investigated by batch leaching tests According to the test results aqueous CrVI accounted for 7080 of the content of total Cr CrVI concentration was controlled by the dissolution degree of CrVIbearing minerals such as

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  • LongTerm Leaching Characteristics of Chromite Ore
    LongTerm Leaching Characteristics of Chromite Ore

    Longterm leaching characteristics of chromium ore processing residue COPR 250 pore volumes of flow PVF was investigated using laboratory flowthrough column testing with synthetic groundwater GW Two saturated flowthrough column experiments simulated the longterm migration of total CrT and hexavalent chromium CrVI from two

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  • processing methods of chromite ore
    processing methods of chromite ore

    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

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  • Detoxification and immobilization of chromite ore
    Detoxification and immobilization of chromite ore

    Schematic illustration of detoxification and immobilization of chromite ore processing residue in spinelbased glassceramic matrix All CrVI species is reduced to CrIII and most chromium contents are incorporated into spinel structure where the residual chromium are resided in the glass networks Download Download highres image 162KB

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  • Mineralogical characterization of chromium ore processing
    Mineralogical characterization of chromium ore processing

    Understanding the mineralogical characterization of chromium ore processing residue COPR is the basis of soil remediation which is polluted by chromium

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  • Remediation of chromite ore processing residue using
    Remediation of chromite ore processing residue using

    Sep 18 2014 Disposal of Chromite Ore Processing Residue COPR is a major concern from an environmental point of view because it consists mainly of CrVI in addition to CrIII CrVI is more soluble and mobile when compared to CrIII The study primarily concentrated on treatment of COPR using solidification and stabilization SS process

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  • US7670576B2 Methods of treatment of chromite ore
    US7670576B2 Methods of treatment of chromite ore

    ore processing processing residue Prior art date 20040910 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 20260425 Application number US11578621 Other versions

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  • Chromite Ore Processing Residue COPR Hazardous
    Chromite Ore Processing Residue COPR Hazardous

    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 110 Chromite ore processing residue COPR which contains hexavalent chromium Cr6 at concentrations typically in the range of thousands of milligramskilograms was deposited over a

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  • Some studies on recovery of chromium from chromite
    Some studies on recovery of chromium from chromite

    RECOVERY OF Cr FROM CHROMITE ORE PROCESSING RESIDUES 2449 I 20 COPRH20 2 at 60C for 30 min The concentration of chromium leached out after the treatment was determined Oxidative treatmentOxidation of chromiumIII in the COPR 08 mm particle size to chromiumVI was canied out by employing various oxidants like

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  • PDF A Review of Chromite Ore Processing Residue COPR
    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 CrVI Although the high temperature chromite process was

    Get Price
  • Biotreatment of chromite ore processing residue by
    Biotreatment of chromite ore processing residue by

    Chromite ore processing residues COPR is the source of the CrVI contamination in the environment Pannonibacter phragmitetus BB was used to treat two different types of COPRs in this research The watersoluble CrVI of COPR A and B is 39829 and 11814 mgkg respectively In the column biotreatment process P phragmitetus BB can reduce CrVI in the leachate to an undetectable level

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  • Modeling Chromium Dissolution and Leaching from
    Modeling Chromium Dissolution and Leaching from

    Dec 30 2005 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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  • COPR Chromite Ore Processing Residue
    COPR Chromite Ore Processing Residue

    related The list of acronyms and abbreviations related to COPR Chromite Ore Processing Residue

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  • Chrome steel from chromium ore processing residue
    Chrome steel from chromium ore processing residue

    Chrome steel from chromium ore processing residue Jay Meegoda Civil and Environmental Engineering In Hudson County New Jersey there are more 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

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  • Chromite ore processing residue in Hudson County New
    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

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  • where chromium ore is found
    where chromium ore is found

    2011126 Treatment of Chromium Contamination and Chromium Ore Processing Residue Technical Paper Treatm VIP MORE INFO Live Chat chromium ore minerals Chromium ore Chromium ore mineral information and data An ore of the metal chromium usually the principal ore mineral is chromite Contact US Chromium

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  • Health Environmental Research Online HERO
    Health Environmental Research Online HERO

    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 CrVI Hydrogarnet has been identified as a major phase in COPR and it has been previously speculated that it has a capacity to host CrVI

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  • Jersey City Chromium Cleanup Onsite Work
    Jersey City Chromium Cleanup Onsite Work

    Extensive investigations identified chromium in soils and groundwater that exceed New Jersey criteria From the 1900s until the 1970s a chrome manufacturing byproduct called chrome ore processing residue was used as fill in parts of Jersey City including the Route 440 properties

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  • Conversion of Chromium Ore Processing Residue to Chrome
    Conversion of Chromium Ore Processing Residue to Chrome

    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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  • Conversion of chromium ore processing residue to chrome
    Conversion of chromium ore processing residue to chrome

    Conversion of chromium ore processing residue to chrome steel Jay N Meegoda Civil and Environmental Engineering New Jersey Institute of Technology Abstract 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

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  • Methods of Treatment of Chromite Ore Processing Residue
    Methods of Treatment of Chromite Ore Processing Residue

    Methods to reduce hexavalent chromium CrVI 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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  • Speciation and spatial distribution of Cr in chromite ore
    Speciation and spatial distribution of Cr in chromite ore

    Mar 13 2017 Remediation of COPR sites requires the key information including chromium oxidation speciation and spatial distribution Samples were gathered from a COPR site in Luliang County in Qujing Yunnan Province of China The total Cr CrVI and chromium species were investigated Results indicated the concentration of total Cr was between 1105 and 21774 mgkg and the concentration of

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  • Chromium Remediation or Release Effect of IronII
    Chromium Remediation or Release Effect of IronII

    Chromite ore processing residue COPR derived from the socalled high lime processing of chromite ore contains high levels of CrIII and CrVI and has a pH between 11 and 12 Ferrous sulfate which is used for remediation of CrVI contamination in wastewater and soils via reduction to CrIII and subsequent precipitation of ironIIIchromiumIII hydroxide has also been proposed for

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