使用聚乙烯亚胺(PEI)辅助超滤法处理放射性废水中的铈(Ce).着重研究了pH,聚合物/金属离子质量比(P/M),离子浓度以及操作压力、运行时间对铈离子(Ce3+)截留率和膜渗透通量的影响,研究结果显示:使用聚合物PEI辅助超滤时,最佳实验条件为pH=5,P/M=15;在最适pH和P/M比值下,3种截留分子量超滤膜对Ce3+截留率分别为88.23％(5 kDa)、87.01％(10 kDa)和89.78％(30 kDa);当溶液中存在Na+和Ca2+时,膜对Ce3+的截留率将会降低.膜通量随着操作压力的增加呈线性增加;3种膜通量均随着运行时间的增加有减小的趋势,且下降率顺序为30 kDa＞10 kDa＞5 kDa.
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