Significance of the long-chain organic cation structure in the sorption of the penconazole and metalaxyl fungicides by organo clays

Journal of Hazardous Materials
M Sonia Rodríguez-CruzM Jesús Sánchez-Martín

Abstract

Sorption-desorption of two different hydrophobic fungicides, penconazole and metalaxyl, by a series of clay minerals layered and non-layered (montmorillonite, illite, kaolinite, muscovite, sepiolite and palygorskite) modified with the two-chain cationic surfactant, dihexadecyldimetylammonium (DHDDMA) was studied by first time in this work. DHDDMA-clays showed a good capacity to sorb both fungicides from water. Freundlich sorption constants (K(f)) increased 22-268-fold for penconazole and 4-112-fold for metalaxyl in relation to natural clays. High sorption irreversibility was observed for penconazole for all modified clays, while for metalaxyl this occurred only for some of the modified clays. Additionally, a comparative study of the sorption of the fungicides by clay minerals modified with organic cations of different structure was carried out by a statistical approach. Non-layered and layered clay minerals modified with the two-chain alkylammonium organic cation DHDDMA, and with single-chain organic cations octadecyltrimethylammonium (ODTMA) and hexadecylpyridinium (HDPY) were used as sorbents. The study indicated a significant linear regression between the distribution coefficients K(d) of fungicides and the organic carbon (O...Continue Reading

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Citations

Apr 6, 2011·Environmental Science and Pollution Research International·Nicoleta A SuciuEttore Capri
Dec 19, 2012·Environmental Science and Pollution Research International·Eva ČadkováJean-Claude Bollinger
May 27, 2011·Journal of Agricultural and Food Chemistry·Alipio Bermudez-CousoManuel Arias Estevez
Jun 4, 2013·Bulletin of Environmental Contamination and Toxicology·Ajoy SahaRajesh Kumar
Jan 1, 2012·Journal of Environmental Sciences (China)·Yaxin ZhangWenjing Lu
Jul 3, 2010·Journal of Hazardous Materials·E Pose-JuanJ E López-Periago
May 17, 2014·The Science of the Total Environment·Raquel RojasHicham El Bakouri
May 9, 2012·Journal of Environmental Quality·Jesús M Marín-BenitoMaría J Sánchez-Martín
May 22, 2013·Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes·Nicoleta Alina SuciuMarco Trevisan
Mar 21, 2012·Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes·Eva CadkováAleš Vaněk

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