Effect of ten quaternary ammonium cations on tetrachloromethane sorption to clay from water

Journal Article · Wed Aug 01 04:00:00 EDT 1990 · Environmental Science and Technology; (United States)

DOI:https://doi.org/10.1021/es00078a003· OSTI ID:5466494

Smith, J A ^[1]; Jaffe, P R ^[2]; Chiou, C T ^[3]

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1. Geological Survey, Trenton, NJ (USA)
2. Princeton Univ., NJ (USA)
3. Geological Survey, Denver, CO (USA)

The mineral surface of Wyoming bentonite (clay) was modified by replacing inorganic ions by each of 10 quaternary ammonium compounds, and tetrachloromethane sorption to the modified sorbents from water was studied. Tetrachloromethane sorption from solution to clay modified with tetramethyl-, tetraethyl-, benzyltrimethyl-, or benzyltriethylammonium cations generally is characterized by relatively high solute uptake, isotherm nonlinearity, and competitive sorption (with trichloroethene as the competing sorbate). For these sorbents, the ethyl functional groups yield reduced sorptive capacity relative to methyl groups, whereas the benzyl group appears to have a similar effect on sorbent capacity as the methyl group. Sorption of tetrachloromethane to clay modified with dodecyldimethyl(2-phenoxyethyl)-, dodecyltrimethyl-, tetradecyltrimethyl-, hexadecyltrimethyl-, or benzyldimethylhexadecylammonium bromide is characterized by relatively low solute uptake, isotherm linearity, and noncompetitive sorption. For these sorbents, an increase in the size of the nonpolar functional group(s) causes an increase in the organic carbon normalized sorption coefficient (K{sub oc}).

• OSTI ID: 5466494
• Journal Information: Environmental Science and Technology; (United States), Journal Name: Environmental Science and Technology; (United States) Vol. 24:8; ISSN ESTHA; ISSN 0013-936X
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540220* -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (1990-)
540250 -- Environment
Terrestrial-- Site Resource & Use Studies-- (1990-)
AMMONIUM COMPOUNDS
BENTONITE
CARBON TETRACHLORIDE
CHLORINATED ALIPHATIC HYDROCARBONS
CLAYS
HALOGENATED ALIPHATIC HYDROCARBONS
HAZARDOUS MATERIALS
LINERS
MANAGEMENT
MATERIALS
MEASURING METHODS
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
SANITARY LANDFILLS
SORPTIVE PROPERTIES
SURFACE PROPERTIES
WASTE DISPOSAL
WASTE MANAGEMENT