Oxidation and removal of arsenic (III) from aerated groundwater by filtration through sand and zero-valent iron.

@article{Leupin2005OxidationAR,
  title={Oxidation and removal of arsenic (III) from aerated groundwater by filtration through sand and zero-valent iron.},
  author={Olivier X Leupin and Stephan J. Hug},
  journal={Water research},
  year={2005},
  volume={39 9},
  pages={1729-40}
}
Removing arsenic from contaminated groundwater in Bangladesh is challenging due to high concentrations of As(III), phosphate and silicate. Application of zero-valent iron as a promising removal method was investigated in detail with synthetic groundwater containing 500 microg/L As(III), 2-3mg/L P, 20mg/L Si, 8.2mM HCO3-, 2.5mM Ca2+, 1.6mM Mg2+ and pH 7.0. In a series of experiments, 1L was repeatedly passed through a mixture of 1.5 g iron filings and 3-4 g quartz sand in a vertical glass column… CONTINUE READING