Use of cetyltrimethylammonium bromide-bentonite to remove organic contaminants of varying polar character from water

Journal Article · Sun Nov 01 04:00:00 EST 1998 · Environmental Science and Technology

DOI:https://doi.org/10.1021/es980353m· OSTI ID:323755

Zhu, L; Ren, X; Yu, S ^[1]

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1. Zhejiang Univ., Hangzhou, Zhejiang (China). Dept. of Environmental Science

Cetyltrimethylammonium bromide (CTMAB)-bentonite was produced by the exchange of cetyltrimethylammonium (CTMA) cations for inorganic ions on the internal and external surfaces of bentonite. CTMAB-bentonite was used to remove organic contaminants of varying polar character from water. The properties and mechanisms for CTMAB-bentonite to sorb benzene, toluene, ethylbenzene, nitrobenzene, aniline, phenol, and p-nitrophenol in water were investigated in some detail. Benzene, toluene, and ethylbenzene sorption to CTMAB-bentonite was characterized by linear isotherms, indicating solute partition between water and the organic phase composed of the large alkyl functional groups of the CTMA cations. Phenol and p-nitrophenol sorption to CTMAB-bentonite was caused primarily by adsorption with relatively strong solute uptake. Their isotherms were nonlinear. Nitrobenzene and aniline sorption to CTMAB-bentonite was weak, and the isotherms were approximately linear. Their sorption was caused by both partition and solute uptake. The sorption data were also evaluated in terms of the octanol-water partition coefficients of the organic compounds.

• OSTI ID: 323755
• Journal Information: Environmental Science and Technology, Journal Name: Environmental Science and Technology Journal Issue: 21 Vol. 32; ISSN ESTHAG; ISSN 0013-936X
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
ALKYLATED AROMATICS
ANILINE
BENTONITE
BENZENE
BROMIDES
ION EXCHANGE
NITROBENZENE
PHENOL
REMEDIAL ACTION
WATER POLLUTION CONTROL