Counterion effects on the sorption of cationic surfactant and chromate on natural clinoptilolite
Article Abstract:
The counterion effects on the sorption of the cationic surfactant hexadecyltrimethylammonium (HDTMA) on clinoptilolite zeolite and HDTMA sorption on KGA-1 kaolinite demostrated the same trend HDTMA-Br > HDTMA-Cl > HDTMA-HSO4, respectively. Results indicated that a combination of entropic , coulombic and hydrophobic effects allow the sorption of chromate and other divalent anions on HDTMA-zeolite.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1997
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Long-term chemical and biological stability of surfactant-modified zeolite
Article Abstract:
Investigations into the potential of surfactant-modified zeolite in bioremediation were conducted, studying the compound's chemical and biological stability. Studies showed that hexadecyltrimethylammonium (HDTMA)-Br or HDTMA-Cl prepared surfactant-modified zeolite was stable in high ionic environments regardless of the pH, with 90% of the HDTMA remaining bound to the zeolite after successive washings. The binding of the HDTMA to the zeolite also showed some interesting possibilities, with zeolite arresting the biocidal properties of HDTMA.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1998
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