Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Selenium removal from drinking water by ion exchange /
Author Maneval, James E. ; Klein, G. ; Sinkovic, J.
Other Authors
Author Title of a Work
Klein, Gerhard
Sinkovic, Jelena.
CORP Author California Univ., Richmond. Water Thermal and Chemical Technology Center.;Environmental Protection Agency, Cincinnati, OH. Water Engineering Research Lab.
Publisher U.S. Environmental Protection Agency, Water Engineering Research Laboratory,
Year Published 1985
Report Number EPA/600/2-85/074
Stock Number PB85-216653
OCLC Number 48617080
Subjects Water--Purification--ion exchange process. ; Selenium.
Additional Subjects Selenium ; Water treatment ; Ion exchanging ; Potable water ; Chemical equilibrium ; Substitutes ; Anion exchanging ; Isotherms ; Chemical properties
Library Call Number Additional Info Location Last
NTIS  PB85-216653 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 01/01/1988
Collation 73 pages ; 28 cm
Strong-base anion exchangers were shown to remove selenate and selenite ions from drinking water. Because selenium species are usually present at low concentrations, the efficiency of removal is controlled by the concentration of the common drinking water anions, the most important being sulfate. The ion-exchange behavior of selenate was found to be identical to that of sulfate, while the behavior of selenite was found to be similar to that of nitrate. The local-equilibrium theory for ion-exchange columns produced good results in predicting selenium removal capacities. Two alternative methods of selenium removal were also investigated. Attempts to find reagents, compatible with water treatment, that were capable of reducing selenate to selenite (for which there are selective removal methods) were unsuccessful. Screening experiments showed that a weak-acid cation exchanger in the ferric form selectively removed selenite from water containing the common drinking-water anions.
Caption title. "June 1985." "EPA/600/2-85/074." Microfiche.