Improved materials for environmental application: Surfactant-modified zeolites

被引:7
|
作者
Jovanovic, V.
Dondur, V.
Damjanovic, Lj.
Zakrzewska, J.
Tomasevic-Canovic, M.
机构
[1] Univ Belgrade, Fac Phys Chem, Belgrade 11000, Serbia
[2] Inst Gen & Phys Chem, Belgrade 11000, Serbia
[3] Inst Technol Nucl & Other Mineral Raw Mat, Belgrade 11000, Serbia
来源
RECENT DEVELOPMENTS IN ADVANCED MATERIALS AND PROCESSES | 2006年 / 518卷
关键词
adsorption; cationic Surfactants; pesticides; surfactant-modified zeolites;
D O I
10.4028/www.scientific.net/MSF.518.223
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The surface properties of zeolites A, X, Y and natural zeolite clinoptilolite (CLI) functionalized by cationic surfactants were investigated. The quaternary ammonium type surfactants, 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. The adsorption capacities of all organic cations followed the order of CLI > CaY > CaX > CaA > NaY > NaX > NaA and increased with the increase of Si/Al molar ratio in zeolite structure. This modification resulted in an alteration in the surface property of zeolites - it changed from hydrophilic to hydrophobic. The adsorption of selected pesticides with different hydrophobicity on surfactant-modified zeolites was studied. It is shown that surfactant-modified zeolites can be used for removal of pesticides from the environment. The increase in hydrophobicity of pesticides resulted in an increase in pesticide adsorption on SDMBA and DSDMA modified zeolites.
引用
收藏
页码:223 / 228
页数:6
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