结合层层组装法,以静电纺聚乙烯醇(PVA)为基底,壳聚糖(CTS)和海藻酸钠(SA)为聚电解质,制备复合纳米纤维膜用于吸附盐离子和重金属离子。研究结果表明,最佳的聚电解质溶液浓度均为2.5g/L,最佳组装层数分别为2和6.5层,其中对于盐离子,Al3+去除率最高;对于重金属离子,Ba2+去除率最高。一次使用时长2～6h为最佳,去除率波动在10%左右,通量为0.85L/(m2·h)。实验证明,该膜在重金属处理方面有较好的发展潜力。
Electrospun PVA was used as support layer to prepare composite nanofibrous membranes with chitosan and sodium alginate of different concentrations and bilayers for dynamic adsorption of common metal ions and heavy metal ions via layer-by-layer assembly.The optimum concentration of polyelectrolyte solution was 2.5g/L,and the number of layers was 2 and 6.5,respectively.The removal rate of Al3+ in the removed common ions was the highest,and the removal rate of Ba2+ in heavy metal ions was the highest.The removal rate fluctuated around 10%,and the flux was 0.85L/(m2·h).Experimental results showed that the membrane had a good potential for development in the processing of heavy metals.
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基金资助
国家自然科学基金项目(51503005、2127400);北京市自然科学基金资助项目(2182014);北京服装学院实培计划项目;北京市科协“金桥工程种子资金”;北京市教育委员会科技计划一般项目(SQKM201710012004);北京服装学院高水平教师队伍建设专项资金(BIFTQG201801);北京市科技北京百名领军人才工程(Z161100004916168);北京市百千万人才工程(110403000402);北京市属高等学校高层次人才引进与培养计划项目-北京市长城学者培育计划(CIT&TCD20150306)
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