Reactive transport modeling to understand attenuation of arsenic concentrations in anoxic groundwater during Fe(II) oxidation by nitrate
October 31, 2019
A previously published field-experimental investigation showed that injection of nitrate in anoxic groundwater that contained aqueous and sediment-bound Fe(II) diminished concentrations of As(V) and As(III) to below drinking-water limits. In the current study, reactive transport modeling confirmed that the observed attenuation was consistent with oxidation of Fe(II) by nitrate, leading to precipitation of hydrous ferric oxide, which, in turn, sorbed both As(V) and As(III). After calibration with site-specific observations, reactive transport modeling could aid in designing effective treatment to remove arsenic using injection of nitrate to oxidize Fe(II).
Citation Information
| Publication Year | 2019 |
|---|---|
| Title | Reactive transport modeling to understand attenuation of arsenic concentrations in anoxic groundwater during Fe(II) oxidation by nitrate |
| Authors | Douglas B. Kent, Richard L. Smith, James Jamieson, John K. Böhlke, Deborah A. Repert, Henning Prommer |
| Publication Type | Book Chapter |
| Publication Subtype | Book Chapter |
| Index ID | 70237907 |
| Record Source | USGS Publications Warehouse |
| USGS Organization | WMA - Earth System Processes Division; Toxics Substances Hydrology Program |
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