ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The surface properties of zeolites A, X, Y and natural zeolite clinoptilolite (CLI)functionalized by cationic surfactants were investigated. The quaternary ammonium typesurfactants, such as hexadecyltrimethylammonium (HDTMA) chloride,stearildimethylbenzylammonium (SDMBA) chloride and distearildimethylammonium (DSDMA)chloride, replaced inorganic cations like Na+ and Ca2+ on the external surface of zeolites. Theadsorption capacities of all organic cations followed the order ofCLI〉CaY〉CaX〉CaA〉NaY〉NaX〉NaA and increased with the increase of Si/Al molar ratio inzeolite structure. This modification resulted in an alteration in the surface property of zeolites - itchanged from hydrophilic to hydrophobic. The adsorption of selected pesticides with differenthydrophobicity on surfactant-modified zeolites was studied. It is shown that surfactant-modifiedzeolites can be used for removal of pesticides from the environment. The increase in hydrophobicityof pesticides resulted in an increase in pesticide adsorption on SDMBA and DSDMA modifiedzeolites
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/13/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.518.223.pdf
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