Experimental oxidative dissolution of sphalerite in the Aznalcollar sludge and other pyritic matrices.

@article{Hita2006ExperimentalOD,
  title={Experimental oxidative dissolution of sphalerite in the Aznalcollar sludge and other pyritic matrices.},
  author={Ra{\'u}l Hita and Jos{\'e} Vicente Ric{\'o}s Torrent and Jerry Marshal Bigham},
  journal={Journal of environmental quality},
  year={2006},
  volume={35 4},
  pages={
          1032-9
        }
}
After the collapse on 25 Apr. 1998 of the Aznalcóllar mine tailings dike in southwestern Spain, 45 km2 of the Guadiamar valley were covered by a pyritic sludge containing up to 2% sphalerite (ZnS). Later, the sludge was mechanically removed and calcium carbonate was plowed into the soil to immobilize heavy metals. By June 2001 more than 60% of the sulfides in the residual sludge had oxidized and soil Zn contents reached locally phytotoxic levels. Therefore, the oxidative dissolution of… CONTINUE READING

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