Abstract: Using 1 mol/L of KCl as drawing solution and heavy metals with different concentrations as stock solution,forward osomsis(FO) water treatment tests have been conducted. The experimental results show that with the increase of FO treatment time,the stock solution is concentrated gradually. The water fluxes demonstrate a process of decrease-increase first and decrease again. Heavy metal Cd stock solution has the highest reverse salt flux and Cd stock solution has the lowest forward rejection rate. The other four kinds of heavy metals stock solution treatment do not have significant difference. Heavy metal rejection rate shows that CTA FO membrane has better rejection effect. The subsequence of rejection rates of the five kinds of heavy metals is as follows：Cd > Hg > As > Cr > Pb.

Key words: heavy metals, forward osomsis(FO), rejection rate

摘要： 以1 mol/L KCl为汲取液，不同浓度重金属溶液为原液，进行了正渗透水处理试验。试验结果表明：随着正渗透处理时间的增加，原液逐渐被浓缩。水通量呈现出了先下降后上升，再下降的过程。反向盐通量以重金属Cd原液最高。正向截留率Cd原液最小，其他4种重金属原液处理间无显著差异。重金属拦截率显示了CTA正渗透膜对5种重金属拦截效果较好。5种重金属的拦截率大小依次为：Cd > Hg > As > Cr > Pb。

关键词: 重金属, 正渗透, 截留率

CLC Number: 

• TQ028.8