Record Display for the EPA National Library Catalog


Main Title Removing Barium and Radium Through Calcium Cation Exchange.
Author Myers, A. G. ; Snoeyink, V. L. ; Snyder, D. W. ;
CORP Author Illinois Univ. at Urbana-Champaign.;Environmental Protection Agency, Cincinnati, OH. Water Engineering Research Lab.
Year Published 1985
Report Number EPA/600/J-85/070;
Stock Number PB85-225548
Additional Subjects Barium ; Radium ; Ground water ; Cation exchanging ; Water treatment ; Potable water ; pH ; Water quality ; Performance evaluation ; Design criteria ; Reprints ;
Library Call Number Additional Info Location Last
NTIS  PB85-225548 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 8p
The removal of barium (Ba) and radium (Ra), which are found in many groundwater sources, was achieved in laboratory studies with an ion exchange process. In the studies, a strong acid resin in the calcium form effectively removed Ba(+2) and Ra (+2) to meet standards. The resin was regenerated with reclaimed brine, which would reduce disposal problems in actual practice. Total hardness, alkalinity, pH, and other water quality parameters remained unchanged. Additional research is needed, however, to refine the process and establish the costs. The process uses a calcium (Ca)-form strong acid ion exchange resin column in parallel with a conventional sodium (Na)-form strong acid resin column. The divalent Ra(+2), Ba(+2), Ca(+2), and magnesium (Mg)+2) ions are exchanged for Na(+1) in the portion of the flow that passes through the Na-form column. If present, Ba(+2) and Ra(+2) are exchanged for Ca(+2) in the fraction of water passing through the Ca-form column, and the total hardness in this fraction is essentially unchanged. Calcium chloride brine (CaCl(+2)) is used to regenerate the Ca-form column, and the spent brine can be reused after precipitating and removing the Ba and Ra.