Arsenic association and stability in long-term disposed arsenic residues.

  title={Arsenic association and stability in long-term disposed arsenic residues.},
  author={Fernando L Pantuzzo and V S T Virg{\'i}nia S T Ciminelli},
  journal={Water research},
  volume={44 19},
Long-term stability of arsenic residues is investigated by determining arsenic phases remaining in gold mining residues after two decades of impoundment. The residues, generated by arsenic coprecipitation with iron and lime, were disposed of in-lined sites for 9-16 years (pit C) and 16-23 years (pits A and B). Arsenic is present in the residues as As(V) species, predominantly in the form of amorphous iron arsenate (55-75% As(total,) pits A and B; 55-70% As(total), pit C) and sorbed onto… CONTINUE READING

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