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《Non-Metallic Mines》 2013-02
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Preparation of Organic Bentonite Composite and Its Adsorption Property for Phenol

Li Jing Xie Xianmei* Duan Lian Wu Xu Gao Jinyun(College of Chemistry and Chemical Engineering,Taiyuan University of Technology,Taiyuan,Shanxi 030024)  
Organic bentonite composites(C-P-Bent) were prepared by cetyltrimethylammonium bromide(CTMAB) and polydimethysiloxane(PDMS) using Ca-montmorillonite as raw materials under a certain condition.The composites were characterized by X-ray diffraction(XRD),fourier transform infrared(FTIR) and used in the adsorption of phenol.The results showed that PDMS alone could not enter the layer of bentonite,but a certain amount of PDMS can be successfully intercalated to CTMAB modified bentonite layer(C-Bent),PDMS are combined with CTMAB and layer board through Vander Waals force in the layer.In the same condition and initial concentration of phenol is 300 mg/L,the amount of CTMAB is 0.5 times and 0.6 times cation exchange capacity of bentonite,compared with C-Bent,the removal rate of phenol by C-P-Bent increased from 55.64% and 63.22% to 64.35% and 74.55%.Thermodynamics research showed that the adsorption process of phenol to modified bentonite was in accord with both Freundlich and Langmuir equations,the Gibbs free energy was about 3 kJ/mol which indicated that the adsorption of phenol was mainly the result of organic phase distribution in layer.
【Fund】: 太原市科学技术项目(120238);; 山西省青年科技研究基金(2012021006-3);; 太原理工大学2012年校青年基金(2012L022)
【CateGory Index】: TD985
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