Chromate reduction in Fe(II)-containing soil affected by hyperalkaline leachate from chromite ore processing residue.

@article{Whittleston2011ChromateRI,
  title={Chromate reduction in Fe(II)-containing soil affected by hyperalkaline leachate from chromite ore processing residue.},
  author={Robert Andrew Whittleston and Douglas I. Stewart and Robert John George Mortimer and Zana C Tilt and Andrew P See Brown and Kalotina Geraki and Ian T Burke},
  journal={Journal of hazardous materials},
  year={2011},
  volume={194},
  pages={
          15-23
        }
}
Highly alkaline (pH 12.2) chromate contaminated leachate (990 μmol L(-1)) has been entering soils below a chromite ore processing residue disposal (COPR) site for over 100 years. The soil immediately beneath the waste has a pH of 11→12.5, contains 0.3→0.5% (w/w) chromium, and 45→75% of the microbially available iron is Fe(II). Despite elevated pH, a viable microbial consortium of Firmicutes dominated iron reducers was isolated from this COPR affected soil. Soil pH and Cr concentration decrease… CONTINUE READING
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