Immobilization of chromate in hyperalkaline waste streams by green rusts and zero-valent iron

Christine M. Rogers; Ian T. Burke; Imad A M Ahmed; Samuel Shaw

doi:10.1080/09593330.2013.834948

Immobilization of chromate in hyperalkaline waste streams by green rusts and zero-valent iron

Christine M. Rogers, Ian T. Burke, Imad A M Ahmed, Samuel Shaw

Research output: Contribution to journal › Article › peer-review

Abstract

Zero-valent iron (ZVI) and green rusts can be used as reductants to convert chromium from soluble, highly toxic Cr(VI) to insoluble Cr(III). This study compared the reduction rates of Cr(VI) by ZVI and two carbonate green rust phases in alkaline/hyperalkaline solutions. Batch experiments were carried out with synthetic chromate solutions at pH 7.7-12.3 and a chromite ore processing residue (COPR) leachate (pH ≈ 12.2). Green rust removes chromate from high pH solutions (pH 10-12.5) very rapidly (

Original language	English
Pages (from-to)	508-513
Number of pages	5
Journal	Environmental Technology
Volume	35
Issue number	4
DOIs	https://doi.org/10.1080/09593330.2013.834948
Publication status	Published - 16 Feb 2014

Keywords

Chromate reduction
Chromite ore processing residue
Green rust
Hyperalkaline waste
Zero-valent iron

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10.1080/09593330.2013.834948

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title = "Immobilization of chromate in hyperalkaline waste streams by green rusts and zero-valent iron",

abstract = "Zero-valent iron (ZVI) and green rusts can be used as reductants to convert chromium from soluble, highly toxic Cr(VI) to insoluble Cr(III). This study compared the reduction rates of Cr(VI) by ZVI and two carbonate green rust phases in alkaline/hyperalkaline solutions. Batch experiments were carried out with synthetic chromate solutions at pH 7.7-12.3 and a chromite ore processing residue (COPR) leachate (pH ≈ 12.2). Green rust removes chromate from high pH solutions (pH 10-12.5) very rapidly (",

keywords = "Chromate reduction, Chromite ore processing residue, Green rust, Hyperalkaline waste, Zero-valent iron",

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AU - Rogers, Christine M.

AU - Burke, Ian T.

AU - Ahmed, Imad A M

AU - Shaw, Samuel

PY - 2014/2/16

Y1 - 2014/2/16

N2 - Zero-valent iron (ZVI) and green rusts can be used as reductants to convert chromium from soluble, highly toxic Cr(VI) to insoluble Cr(III). This study compared the reduction rates of Cr(VI) by ZVI and two carbonate green rust phases in alkaline/hyperalkaline solutions. Batch experiments were carried out with synthetic chromate solutions at pH 7.7-12.3 and a chromite ore processing residue (COPR) leachate (pH ≈ 12.2). Green rust removes chromate from high pH solutions (pH 10-12.5) very rapidly (

AB - Zero-valent iron (ZVI) and green rusts can be used as reductants to convert chromium from soluble, highly toxic Cr(VI) to insoluble Cr(III). This study compared the reduction rates of Cr(VI) by ZVI and two carbonate green rust phases in alkaline/hyperalkaline solutions. Batch experiments were carried out with synthetic chromate solutions at pH 7.7-12.3 and a chromite ore processing residue (COPR) leachate (pH ≈ 12.2). Green rust removes chromate from high pH solutions (pH 10-12.5) very rapidly (

KW - Chromate reduction

KW - Chromite ore processing residue

KW - Green rust

KW - Hyperalkaline waste

KW - Zero-valent iron

U2 - 10.1080/09593330.2013.834948

DO - 10.1080/09593330.2013.834948

M3 - Article

VL - 35

SP - 508

EP - 513

JO - Environmental Technology

JF - Environmental Technology

IS - 4

ER -

Immobilization of chromate in hyperalkaline waste streams by green rusts and zero-valent iron

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Keywords

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