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.

All Other Basic Inorganic Chemical Manufacturing, Industrial inorganic chemicals, not elsewhere classified, Surface active agents, Surface Active Agent Manufacturing, Zeolites, Soil absorption and adsorption, Absorption, Soil science

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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.

Research and Development in the Physical, Engineering, and Life Sciences, Ecological Sciences, Bioremediation, Environmental sciences

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