On-off mobilization of contaminants in soils during redox oscillations.

  title={On-off mobilization of contaminants in soils during redox oscillations.},
  author={Raoul-Marie Couture and Laurent Charlet and Ekaterina Markelova and Beno{\^i}t Mad{\'e} and Christopher T Parsons},
  journal={Environmental science & technology},
  volume={49 5},
Near-surface biogeochemical systems can oscillate between oxic and anoxic conditions. Under such periodic changes many redox-sensitive inorganic contaminants undergo speciation, mobility and toxicity changes. We investigated the changes to chromium (Cr), arsenic (As), selenium (Se), antimony (Sb) and uranium (U) mobility during a series of laboratory experiments where argillaceous substrates were subjected to successive cycles of oxidizing and reducing conditions. The EH oscillated between -320… CONTINUE READING