Sorption of nonpolar organic compounds, inorganic cations, and inorganic oxyanions by surfactant-modified zeolites

Treatment of natural zeolites with cationic surfactants yielded sorbents with a strong affinity for nonpolar organics and for inorganic oxyanions, and caused little decrease in the zeolite's sorption of transition metal cations. Two zeolites modified with hexadecyltrimethylammonium or methyl-4-...

Full description

Saved in:
Bibliographic Details
Published inACS symposium series no. 594
Main Authors Bowman, R.S. (New Mexico Institute of Mining and Technology, Socorro, NM.), Haggerty, G.M, Huddleston, R.G, Neel, D, Flynn, M.M
Format Journal Article
LanguageEnglish
Published 1995
Subjects
COMPOSE ORGANIQUE
COMPUESTOS ORGANICOS
SORCION
SORPTION
SURFACTANT
SURFACTANTES
ZEOLITAS
ZEOLITE
Online AccessGet more information

Cover

More Information
Summary:Treatment of natural zeolites with cationic surfactants yielded sorbents with a strong affinity for nonpolar organics and for inorganic oxyanions, and caused little decrease in the zeolite's sorption of transition metal cations. Two zeolites modified with hexadecyltrimethylammonium or methyl-4-phenylpyridinium remained chemically stable in aggressive aqueous solutions and organic solvents. The modified zeolites sorbed benzene, toluene, p-xylene, ethylbenzene, 1,1,1-trichloroethane, and perchloroethylene from aqueous solution via a partitioning mechanism; sorption affinity was in the order of the sorbates' octanol-water partition coefficients. Zeolites with or without surfactant treatment strongly sorbed Pb2+ from solution. Surfactant-modified zeolite also sorbed chromate, selenate, and sulfate from solution; the mechanism appears to be surface precipitation of a surfactant-oxyanion complex
Bibliography:P36
T01
9608358
ISSN:0097-6156
1947-5918