Arsenic removal via softening
Conference
·
OSTI ID:82807
- Univ. of Colorado, Boulder, CO (United States). Dept. of Civil Engineering
The removal of arsenic during softening was investigated using synthetic solutions. Arsenic removal is facilitated by formation of a variety of solids including Mg(OH){sub 2}, calcite and Mn(OH){sub 2}. At pH > 11.0 arsenic removal was independent of magnesium concentration for initial concentrations of 20 or 50 mg/L Mg{sup +2}, but arsenic removal was improved at lower pHs at the higher initial magnesium concentration. For systems initially containing only Mn{sup +2}, arsenic removal appears to be through sorption onto Mn(OH){sub 2} solids rather than due to formation of a Mn{sub 3}(AsO{sub 4}){sub 2} precipitate. The presence of trace amounts of orthophosphate hindered overall removal of arsenic from synthetic groundwater solutions.
- OSTI ID:
- 82807
- Report Number(s):
- CONF-940789--; ISBN 0-7844-0031-8
- Country of Publication:
- United States
- Language:
- English
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