writer：Bing Wang*, Xinlin Yang, and Wenqiang Huang
keywords：adsorption; plate affinity membrane; chelating
source：期刊
specific source：J. Appl. Polym. Sci., 103 (4), 2514-2522 (2007). DOI: 10.1021/app.24994
Issue time：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.