期刊
JOURNAL OF MEMBRANE SCIENCE
卷 517, 期 -, 页码 64-72出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.memsci.2016.05.033
关键词
Nanofiltration membrane; Dually charged composite layer; Amination; Interfacial polymerization; Donnan exclusion
资金
- National Natural Science Foundation of China [51278336, 51578376, 21306135]
- Research Program of Application Foundation and Advanced Technology, Tianjin, China [15JCZDJC37500]
- Science and Technology Plans of Tianjin [15PTSYJC00230]
State-of-the-art nanofiltration (NF) membranes generally positively or negatively charged could not remove both multivalent cations and anions once and for all according to the Donnan Exclusion. Designing NF membranes with facile approach for effective removal of multivalent-salt without compromising the permeation is still a tough challenge. In this work, we demonstrate a sort of novel NF membrane consists of a positively charged interlayer sandwiched between substrate and negatively charged outermost surface. The restructured NF membranes with dually charged composite layer were fabricated via amination-interfacial polymerization (A-IP) on poly (vinyl chloride) (PVC) substrate. The resultant NF membranes exhibited super high salts rejection of up to 99.0% MgCl2, 99.0% MgSO4, 98.5% CaCl2, 95.7% Pb(NO3)(2), and 96.0% Na2SO4. Additionally, reasonably high flux (8.7 L m(-2) h(-1) bar(-1), (pure water permeability (PWP))) approaching those of commercial NF membranes was obtained due to the relatively loose structure of the composite layer. Furthermore, the transport and separation mechanism of the restructured NF membranes reveals that the significant upgraded separation performance could be attributed to the synergistic effect of the dually charged layer. Moreover, the dually charged composite layer shown none unfavorable interaction and the resultant NF membranes possessed good interfacial stability. (C) 2016 Published by Elsevier B.V.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据