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remediation of chromite ore processing residue using ferrous

Remediation of chromite ore processing residue using

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 reduce hexavalent chromium [Cr(VI)] to trivalent chromium [Cr(III)] in slurry form and

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(PDF) Remediation of chromite ore processing residue using

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

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(PDF) Remediation of chromite ore processing residue using

Remediation of chromite ore processing residue using ferrous sulfate and calcium polysulfide

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Remediation of chromite ore processi ng residue using

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

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Efficient extraction of slowly-released Cr(vi) from nano

Residual unreacted Cr(vi) incorporated in ferrous-sulfate-reduced chromite ore processing residue (rCOPR) can be slowly released during deposition, posing a significant threat to the environment. Recent studies indicate that such Cr(vi) mainly exists within the nano-sized ion channels of ettringite, forming Environmental Remediation Environmental Science: Nano Recent HOT Articles

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Remediation of chromite ore processing residue using

Remediation of chromite ore processing residue using ferrous sulfate and calcium polysulfide chromite;COPR;ettringite;ferrous;polysulfideresidue (COPR) is an industrialrefuse that was used as fill material at various sites in theUnited States.

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Effects of particle size and acid addition on the

Aug 30, 2009· A bench-scale treatability study was conducted to assess the effects of particle size and acid addition on the remediation of chromite ore processing residue (COPR) using ferrous sulfate. The remediation scheme entailed the chemical reduction of hexavalent chromium [Cr(VI)] and the mitigation of swell potential.

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Assessment of ferrous chloride and Portland cement for the

Oct 01, 2015· 1. Introduction. Chromite Ore Processing Residue (COPR) is an industrial waste produced during the extraction process of chromium from its ore. Millions of tons of COPR were produced in the US using the high lime process.

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Chromium Remediation or Release? Effect of Iron(II

Jun 18, 2003· 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 and soils via reduction to Cr(III) and subsequent precipitation of iron(III)/chromium(III) hydroxide, has also been

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IN SITU CR(VI) TREATMENT USING A FERROUS IRON-BASED

Laboratory and field studies were conducted to evaluate the performance of a ferrous sulfate/ sodium hydrosulfite (dithionite) reductant blend in treating a hexavalent chromium (Cr(VI)) source area and Cr(VI) dissolved phase plume at a former industrial site in Charleston, South Carolina. The Cr(VI) source area, consisting largely of chromite ore processing residue (COPR) generated in the

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Remediation of chromite ore processing residue using

Remediation of chromite ore processing residue using ferrous sulfate and calcium polysulfide chromite;COPR;ettringite;ferrous;polysulfideresidue (COPR) is an industrialrefuse that was used as fill material at various sites in theUnited States.

More

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 Cr(VI) in addition to Cr(III). Cr(VI) is more soluble and mobile when compared to Cr(III). The study primarily concentrated on treatment of COPR using solidification and stabilization (S/S) process.

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Remediation of chromite ore processing residue using

Remediation of chromite ore processing residue using ferrous sulfate and calcium polysulfide

More

Efficient extraction of slowly-released Cr(vi) from nano

Residual unreacted Cr(vi) incorporated in ferrous-sulfate-reduced chromite ore processing residue (rCOPR) can be slowly released during deposition, posing a significant threat to the environment. Recent studies indicate that such Cr(vi) mainly exists within the nano-sized ion channels of ettringite, forming Environmental Remediation Environmental Science: Nano Recent HOT Articles

More

Assessment of ferrous chloride and Portland cement for the

Chromite Ore Processing Residue (COPR) is an industrial waste containing up to 7% chromium (Cr) including up to 5% hexavalent chromium [Cr(VI)]. The remediation of COPR has been challenging due to the slow release of Cr(VI) from a clinker like material and thereby the incomplete detoxification of Cr(VI) by chemical reagents.

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Assessment of ferrous chloride and Portland cement for the

Chromite Ore Processing Residue (COPR) is an industrial waste containing up to 7% chromium (Cr) including up to 5% hexavalent chromium [Cr(VI)]. The remediation of COPR has been challenging due to the slow release of Cr(VI) from a clinker like material and thereby the incomplete detoxification of Cr(VI) by chemical reagents. The use of sulfur based reagents such as ferrous sulfate and calcium...

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Chromium Remediation or Release? Effect of Iron(II

Jun 18, 2003· 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 and soils via reduction to Cr(III) and subsequent precipitation of iron(III)/chromium(III) hydroxide, has also been

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Chromium Remediation or Release? Effect of Iron(II

Chromium Remediation or Release? Effect of Iron(II) Sulfate Addition on Chromium(VI) Leaching from Chromite ore processing residue (COPR), derived from the 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 and soils via reduction

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IN SITU CR(VI) TREATMENT USING A FERROUS IRON-BASED

Laboratory and field studies were conducted to evaluate the performance of a ferrous sulfate/ sodium hydrosulfite (dithionite) reductant blend in treating a hexavalent chromium (Cr(VI)) source area and Cr(VI) dissolved phase plume at a former industrial site in Charleston, South Carolina. The Cr(VI) source area, consisting largely of chromite ore processing residue (COPR) generated in the

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Mahmoud Wazne LAU School of Engineering

“Investigation of heave and remediation of chromite ore processing residue (COPR) materials using ferrous sulfate”, Proc. of the Second International Conference on Environmental Science and Technology, American Academy of Science, Houston, Texas, USA, August 19-22, page. 239.

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Remediation of chromite ore processing residue using

Sep 18, 2014· Tao Huang, Longfei Liu, Lulu Zhou, Shuwen Zhang, Electrokinetic removal of chromium from chromite ore-processing residue using graphite particle-supported nanoscale zero-valent iron as the three-dimensional electrode, Chemical Engineering Journal,

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Remediation of Chromite Ore Processing Residues with

Remediation of Chromite Ore Processing Residues with Bacteria, Biomass and Ferrous Sulfate

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Chromium remediation or release? Effect of iron(II

Jul 15, 2003· 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 and soils via reduction to Cr(III) and subsequent precipitation of iron(III

More

Remediation of chromite ore processing residue using

Remediation of chromite ore processing residue using solidification and stabilization process

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