||Organic Cation Effects on the Sorption of Metals and Neutral Organic Compounds on Aquifer Material (Journal Version).
Bouchard, D. C. ;
Powell, R. M. ;
Clark, D. A. ;
||Robert S. Kerr Environmental Research Lab., Ada, OK. ;Northrop Services, Inc., Ada, OK.
Soil chemistry ;
Organic ions ;
Trace elements ;
Ecological concentrations ;
Research projects ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
Sorption of ethylhexadecyldimethylammonium (EHDDMA+), a large organic cation, and three neutral organic compounds (NOC's) on two low organic carbon aquifer materials was studied using a soil batch equilibration technique. EHDDMA+ competed effectively with metals for exchange sites and EHDDMA+ sorption was accompanied by an equimolar charge desorption of metals. NOC's sorption on the aquifer materials was low (K less than or = 0.22) which was consistent with the sorbent's low organic carbon content. However, EHDDMA+ sorption increased toluene sorption by two orders of magnitude. The enhanced toluene sorption was due to the hydrophobic surface provided by the hydrocarbon moiety of sorbed EHDDMA+. (Copyright (c) J. Environmental Science Health 1988.)