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Synthesis and Preparation of Polysulfone Hollow Fiber Chelating Membrane Modified with Thiourea
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作者 王兵 黄磊 肖峰 《Journal of Donghua University(English Edition)》 EI CAS 2006年第4期52-58,共7页
Several kinds of chloromethyl polysulfones (CMPF) with different chlorinity and reactive groups were synthesized by Friedel.crafts reaction, which could be utilized as reactively matrix membrane materials. The CMPF ... Several kinds of chloromethyl polysulfones (CMPF) with different chlorinity and reactive groups were synthesized by Friedel.crafts reaction, which could be utilized as reactively matrix membrane materials. The CMPF hollow matrix membranes were prepared with phase inversion by utilization of CMPF/additive/DMAC casting solution and CMPF as membrane materials. It was found that the effects of additive content, bore liquid and dry spinning distance on the structure of CMPF hollow fiber matrix membrane were different. A high qualified palysulfone hollow fiber chelating membrane modified with thiourea as chelating groups was prepared using CMPF as membrane matrix materials, through the reaction between thiourea and CMPF hollow fiber matrix membrane to afford the methyl iso-thiourium polysulfone. The experimental results showed that thermal drawing could increase the mechanical properties of matrix membrane, and the thermal treatment could increase the homogeneity and stability of the structure of polysulfoue hollow fiber chelating membrane modified with thiourea. 展开更多
关键词 chloromethyl polysulfone THIOUREA matrix material hollow fiber chelating membrane.
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Recovery Properties of Polysulfone Hollow Fiber Chelating Membrane Modified with Thiourea for Mercury (Ⅱ)
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作者 王兵 肖峰 黄磊 《Journal of Donghua University(English Edition)》 EI CAS 2007年第1期69-74,共6页
The adsorption isotherms of the polysulfone hollow fiber chelating membrane modified with thionrea as chelating groups for Hg^2+ were determined. The effects of mobile phase conditions and the operating parameters on... The adsorption isotherms of the polysulfone hollow fiber chelating membrane modified with thionrea as chelating groups for Hg^2+ were determined. The effects of mobile phase conditions and the operating parameters on removal performance of the chelating membrane for Hg^2+ were also investigated. The recovery of Hg^2+ decreased at low pH and the optimum range of pH was from 6 to 7. The feed concentration effected on recovery of Hg^2+ at the specified loading amount of Hg^2+. The Hg^2+ could be removed from different concentration feed solution by chelating membrane. The increase of feed flow rate led to slight decrease of recovery of Hg^2+ at the specified loading amount of Hg^2+. The chelating membrane could be operated at height feed flow rate and a large-scale removal of H^2+ could be realized. With the increase of load amount, Hg^2+ recovery decreased, but the saturation degree of chelating membrane increased. According to required recovery of H^2+ and the saturation degree of chelating membrane, the optimum loading amount of Hg^2+ should be selected in the actual removal of H^2+. 展开更多
关键词 ADSORPTION chelating membrane thiourea mercury (Ⅱ).
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