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Preparation and Recovery of Polysulfone Affinity Membrane with Mercapto as Chelating Group for Hg2+ cations
作者:Bing Wang*, Xinlin Yang, and Wenqiang Huang
關鍵字:adsorption; plate affinity membrane; chelating
論文來源:期刊
具體來源:J. Appl. Polym. Sci., 103 (4), 2514-2522 (2007). DOI: 10.1021/app.24994
發表時間:2007年
Highly qualified homogeneous poly(benzylsulfone) plate affinity membrane with mercapto group (PSFSH) was prepared successively through reactions between chloromethyl polysulfone matrix membrane and thiourea, and then alkalic hydrolysis. The mercapto-functionalized polysulfone affinity membrane was utilized for the adsorption of Hg2+ cations through the coordination of the mercapto group and Hg2+ cations, in which the effects of the morphological and the structure of the affinity membrane on the chelating properties were investigated. The chelating conditions, including concentration of Hg2+, and temperature and pH of the introductory solution had significant influence on the chelating capacity of PSF-SH affinity membrane. The highest static and dynamic chelating capacity of PSF-SH plate membrane for Hg2+ cations were 398 and 403 mg/cm2 per membrane, respectively, which demonstrated that the resultant polymer membrane was a highly efficient affinity chromatography for Hg2+. The affinity membrane containing mercapto group can be conveniently recovered by dilute hydrochloric acid for coordination of Hg2+ cations, which would have wide application for the treatment of waste water containing heavy metal cations.
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