Fabrication of asymmetric poly(m-phenylene isophthalamide)nanofiltration membrane for chromium(VI) removal

查看全文 作　　者：Xiaojing [1]Ren;Changwei [1]Zhao;Songshan [1]Du;Tao [1,2]Wang;Zhaokun [1]Luan;Jun [1]Wang;Deyin [1]Hou

机构地区：[1]State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;[2]College of Chemical Engineering, Xiangtan University, Xiangtan 411105, China

出　　处：《Journal of Environmental Sciences》索引2010年第22卷第9期,共7页

基　　金：supported by the High Technology Research and Development Program (863) of China(No. 2007AA06Z339);the National Key Technologies R&D Program of China (No. 2006BAD01B02-02,2006BAJ08B00) 摘　　要：The feasibility of employing nanofiltration for the removal of chromium(VI) from wastewater was investigated. Poly (m-phenylene isophthalamide) (PMIA) was used to fabricate asymmetric nanofiltration membrane through the phase-inversion technique. Scanning electron microscopy (SEM) and atomic force microscopy (AFM) were used to characterize the obtained membrane, and the both confirmed a much smoother surface which could reduce membrane fouling. The PMIA membrane showed different rejections to electrolytes in a sequence of Na2SO4 > MgSO4 > NaCl > MgCl2, which was similar to the sequence of the negatively charged nanofiltration membranes. Separation experiments on chromium(VI) solution were conducted at various operating conditions, such as feed concentration, applied pressure and pH. It is concluded that chromium(VI) could be effectively removed from chromiumcontaining wastewater by the PMIA nanofiltration membranes while maintaining their pollution resistance under alkaline condition. 关键词：纳滤膜技术铬膜去除率非对称扫描电子显微镜制备原子力显微镜苯

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Fabrication of asymmetric poly(m-phenylene isophthalamide)nanofiltration membrane for chromium(VI) removal

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