OLS : Record


Main Title Adsorption of Organic Cations to Natural Materials.
Author Brownawell, B. J.; Chen, H.; Collier, J. M.; Westall, J. C.;
CORP Author Oregon State Univ., Corvallis. Dept. of Chemistry.;Robert S. Kerr Environmental Research Lab., Ada, OK.
Publisher c1990
Year Published 1990
Report Number EPA-R-814501; EPA/600/J-90/258;
Stock Number PB91-144881
Subjects Pyridinium compounds; Cations; Clay minerals; Adsorption; Sorbents; Isotherms; Water; Solutions; Ion exchange; Reprints;
Library   Call Number Additional Info Location Date Modified
NTIS PB91-144881 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/13/1991
Collation 10p
Abstract The factors that control the extent of adsorption of amphiphilic organic cations on environmental and pristine surfaces have been studied. The sorbents were kaolinite, montmorillonite, two aquifer materials, and a soil; solutions contained various concentrations of NaCl and CaCl2, at various pH values. The distribution ratio of the dodecylpyridinium was strongly dependent on the nature and concentration of the inorganic cations in solution, but virtually independent of solution pH. The adsorption isotherms were distinctly nonlinear, even at very low surface concentrations of organic cations. A multisite adsorption model has been developed to describe adsorption over a wide range of dodecylpridinium, NaCl, and CaCl2 concentrations. Two types of adsorption reactions were found to be significant: exchange of pyridinium with an alkali-metal cation, and adsorption of pyridinium with chloride counterion. (Copyright (c) by the American Chemical Society, 1990.)
Supplementary Notes Pub. in Environmental Science and Technology, v24 n8 p1234-1241 1990. Sponsored by Robert S. Kerr Environmental Research Lab., Ada, OK.
NTIS Title Notes Journal article.
Title Annotations Reprint: Adsorption of Organic Cations to Natural Materials.
Category Codes 99F; 68D
NTIS Prices PC A02/MF A01
Primary Description 600/15
Document Type NT
Control Number 109129871
Cataloging Source NTIS/MT
Origin NTIS
Type CAT