Record Display for the EPA National Library Catalog


Main Title Nitrate removal from water supplies by ion exchange /
Author Clifford, Dennis A., ; Weber., Walter J.
Other Authors
Author Title of a Work
Weber, Walter J.,
CORP Author Michigan Univ., Ann Arbor.;Municipal Environmental Research Lab., Cincinnati, Ohio. Water Supply Research Div.
Publisher United States Environmental Protection Agency, Muncipal Environmental Research Laboratory, Water Supply Research Division, Office of Research and Development,
Year Published 1978
Report Number EPA-600/2-78-052; EPA-R-803898
Stock Number PB-285 275
OCLC Number 04164509
ISBN pbk.
Subjects Nitrates ; Water--Purification--Ion exchange process ; Water-supply ; Water Pollution
Additional Subjects Inorganic nitrates ; Ion exchange resins ; Water treatment ; Chemical removal(Water treatment) ; Technology ; Potable water ; Anions ; Statistical analysis ; Numerical analysis ; Performance evaluation ; Isotherms ; Selectivity ; Demineralizing ;
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD ARCHIVE EPA 600-2-78-052 Headquarters Library/Washington,DC 03/17/2014
EJBD  EPA 600-2-78-052 Headquarters Library/Washington,DC 03/08/2016
ELBD  EPA 600-2-78-052 AWBERC Library/Cincinnati,OH 08/16/2016
ESAD  EPA 600-2-78-052 Region 10 Library/Seattle,WA 03/23/2010
NTIS  PB-285 275 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation xvi, 292 pages : illustrations, figures, tables ; 28 cm
Anion exchange using synthetic organic resins is a proven and practical technology for the removal of nitrate from water supplies. However, disposal of the spent regenerant brine solution containing nitrate is a potential problem. Two processes were examined in detail in this report--single-bed strong-base anion exchange with NaCl regeneration and two-bed strong-acid, weak-base ion exchange with HCl and NH4OH regeneration. Both systems must be operated to nitrate breakthrough to minimize regeneration costs. The two-bed process is one and one-half to two times as expensive to build and operate as is the single-bed process, but produces softened low-TDS, low-nitrate water, and has a readily disposable, spent regenerant with fertilizer value. Important design considerations were found to include the nitrate and sulfate concentrations in the raw water, the service flow rate, the resin bed depth, and the nitrate/chloride selectivity of the resin. The sulfate, nitrate, chloride, and bicarbonate selectivities and multicomponent column behavior of the anion resins available from U.S. manufacturers were examined and are reported in detail. An important peripheral finding was that significant quantities of nonvolatile organics were leached from 'clean' resins into the treated water.
EPA Grant No. Contract Number: R-803898. "June 1978." Includes bibliographical references (pages 173-183).