Binding of HgII to high-affinity sites on bacteria inhibits reduction to Hg0 by mixed FeII/III phases.

  title={Binding of HgII to high-affinity sites on bacteria inhibits reduction to Hg0 by mixed FeII/III phases.},
  author={Bhoopesh Mishra and Edward J O'Loughlin and Maxim I Boyanov and Kenneth M. Kemner},
  journal={Environmental science & technology},
  volume={45 22},
Magnetite and green rust have been shown to reduce aqueous Hg(II) to Hg(0). In this study, we tested the ability of magnetite and green rust to reduce Hg(II) sorbed to 2 g · L(-1) of biomass (Bacillus subtilis), at high (50 μM) and low (5 μM) Hg loadings and at pH 6.5 and 5.0. At high Hg:biomass loading, where Hg(II) binding to biomass is predominantly through carboxyl functional groups, Hg L(III)-edge X-ray absorption spectroscopy showed reduction of Hg(II) to Hg(0) by magnetite. Reduction… CONTINUE READING
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