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SELENIUM OXIDATION AND REMOVAL BY ION EXCHANGE
Citation:
Boegel, J. AND D. Clifford. SELENIUM OXIDATION AND REMOVAL BY ION EXCHANGE. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/2-86/031.
Description:
Strong-base anion exchange was evaluated as a process for the removal of trace quantities of selenium from groundwater. The efficiency of the process was found to be dependent on the oxidation state of selenium, with the selenate anion (Se(VI)) having a greater affinity for the anion-exchange resin than selenite or biselenite anions (Se(IV)). An analytical method was developed to measure the concentrations of Se(IV) and Se(VI) (i.e., to determine the speciation of selenium) at trace concentrations in groundwater. The oxidation of Se(IV) to Se(VI) at trace concentration in groundwater was studied with this new analytical method.