Arsenic concentrations (Total Recoverable As by EPA Method 3051) and solid-phase speciation (by X-ray Absorption Near-Edge Spectroscopy-XANES) were assessed as a function of depth through Fe-media beds for two commercially available products from pilot-scale field tests.
These results were compared with data from solution (de-ionized water- DI-H2O) concentrations of As equilibrated with the Fe-media in an anoxic environment at 4°C.
These conditions (anoxic, 4°C) were employed in order to minimize variation (especially microbial effects) and lay a foundation for future...
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