Effects of increasing acidity on metal(loid) bioprecipitation in groundwater: column studies.

@article{Davis2007EffectsOI,
  title={Effects of increasing acidity on metal(loid) bioprecipitation in groundwater: column studies.},
  author={Alexander C Davis and Bradley M Patterson and Michelle E Grassi and Blair S Robertson and Henning Prommer and Allan J McKinley},
  journal={Environmental science & technology},
  year={2007},
  volume={41 20},
  pages={7131-7}
}
Large-scale column experiments were carried out over a period of 545 days to assess the effect of increasing acidity on bacterial denitrification, sulfate reduction, and metal(loid) bioprecipitation in groundwater affected by acid mine drainage. At a groundwater pH of 5.5, denitrification and Cu2+ removal, probably via malachite (Cu2(OH)2CO3) precipitation, were observed in the ethanol-amended column. Sulfate reduction, sulfide production, and Zn2+ removal were also observed, with Zn2+ removal… CONTINUE READING