Nanotibrous membrane of wool keratose/silk fibroin blend for heavy metal ion adsorption
Nanotibrous membrane of wool keratose/silk fibroin blend for heavy metal ion adsorption
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DOI：
10.1016/j.memsci.2007.06.003
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发表时间：
2007-09-15
影响因子：
9.5
通讯作者：
Park, Young Hwan
中科院分区：
文献类型：
--
作者：
Ki, Chang Seok;Gang, Eun Hee;Park, Young Hwan
本研究采用静电纺丝法制备了SF和WK/SF共混纳米纤维膜，并对其作为重金属离子吸附剂的性能进行了评价。电纺纳米纤维膜由直径为200-400 nm的随机取向的超细纤维组成。压力-通量测试结果表明，该膜的通量与普通微滤膜相近。以Cu 2+为模型重金属离子，在原液中进行金属离子吸附试验。由于静电纺丝纳米纤维结构的大表面积和高孔隙率，与普通纤维过滤器（羊毛条和滤纸）相比，纳米纤维膜表现出高的金属离子容量。特别是WK/SF共混纳米纤维膜对金属离子的吸附性能优异。此外，其吸附能力在几个再循环过程（解吸和再吸附）之后保持不变，这作为亲和膜是非常有利的。静电纺丝WK/SF纳米纤维膜非常适合于去除和回收水中的重金属离子。(c)2007 Elsevier B. V.保留所有权利。
In this study, SF and WK/SF blend nanofibrous membranes were prepared by electrospinning and their performances were evaluated as a heavy metal ion adsorbent. The electrospun nanofibrous membranes were comprised of randomly oriented ultra-fine fibers of 200-400 nm diameters. As a result of pressure-flux test, the membranes exhibited similar flux to ordinary microfiltration membrane. Metal ion adsorption test was performed with Cu2+ as a model heavy metal ion in a stock solution. Due to large surface area and high porosity of electrospun nanofibrous structure, the nanofibrous membranes exhibited high metal ion capacities compared with common fibrous filters (wool sliver and filter paper). Especially, the WK/SF blend nanofibrous membrane had an exceptional performance for the adsorption of metal ions. Furthermore, its adsorption capacity has been maintained after several recycling process (desorption and re-adsorption) which is very advantageous as an affinity membrane. The electrospun WK/SF nanofibrous membrane is very suitable for removing and recovering heavy metal ions in water. (c) 2007 Elsevier B.V. All rights reserved.