Characteristics of phenol and chlorinated phenols sorption onto surfactant-modified bentonite

Surfactant-modified bentonite was synthesized by replacing adsorbed Na+ with long-chain alkyl quaternary ammonium cation, hexadecyltrimethylammonium bromide (HDTMAB). The sorption isotherms of phenol, p-chlorophenol, and 2,4-dichlorophenol were modeled according to the Langmuir and Freundlich equati...

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Bibliographic Details
Published in:Journal of colloid and interface science 2006-06, Vol.298 (1), p.39-49
Main Authors: Rawajfih, Zahir, Nsour, Najwa
Format: Article
Language:English
Subjects:
Adsorption
Chemistry
Chlorinated phenols
Exact sciences and technology
General and physical chemistry
Partitioning
Phenol
Sorption
Surface physical chemistry
Surfactant-modified clay
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Summary:Surfactant-modified bentonite was synthesized by replacing adsorbed Na+ with long-chain alkyl quaternary ammonium cation, hexadecyltrimethylammonium bromide (HDTMAB). The sorption isotherms of phenol, p-chlorophenol, and 2,4-dichlorophenol were modeled according to the Langmuir and Freundlich equations. The Langmuir isotherm was found to describe the equilibrium adsorption data well. The mechanisms and characteristics of sorption of these ionizable organic contaminants onto surfactant-modified bentonite from water were investigated systematically and described quantitatively. The sorption properties are affected by the treatment conditions, such as amount of organobentonite, and the properties of organic compounds. Results indicated that adsorption of phenols from water was in proportion to their hydrophobicities, which increased with chlorine addition (phenol
ISSN:0021-9797
1095-7103
DOI:10.1016/j.jcis.2005.11.063