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《Environmental Science & Technology》 2009-02
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Preparation of Triolein/CA Sorbent and Its Adsorption for POPs in Water

HUO Jin-xian1,2, GUO Yong2, WANG Zhi1, WANG Mei-rong3 (1.Tianjin University,Tianjin 300072,China;2.School of Chemistry and Chemical Engineering,Shanxi Datong University; 3.School of Physics and Electronic Science,Shanxi Datong University,Datong 037009,China)  
After triolein was dispersed into cellulose acetate (CA)matrix by using acetone as solvent,a novel hydrophilic composite sorbent that could effectively accumulate persistent organic pollutants (POPs) in water was developed by the method of suspension polymerization. Different dispersants and suspended medium and their dosage were studied. Diameter of spherical sorbent was about 1~2mm. Sorbent structure analyzed by scanning electron microscope indicated that triolein was perfectly dispersed into CA matrix. Taking heptachlor,diedrin,endrin and metrix as representative compounds of POPs, kinetic experiments results indicated that about 80% POPs could be removed in fast adsorption stage,but adsorptive equilibrium was not obtained and slow adsorption still carried through. Adsorptive rate for metrix was far lower than other POPs. Kinetic experiments identified that adsorptive rate was not only related to octanol/water coefficient but related to molecular structure of POPs.
【Fund】: 山西省教育厅高校科技开发项目(200713026);; 中国博士后基金(20070410039)
【CateGory Index】: X703.3
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