以磷酸三丁酯(TBP,质量分数为40%)/煤油为萃取剂、氢氧化钠溶液为反萃剂,采用一种新型的液膜技术--中空纤维更新液膜(HFRLM)技术处理含铬废水.研究了HFRLM技术对废水中Cr(Ⅵ)的去除与浓缩效果.结果表明,中空纤维更新液膜技术可同时实现废水中Cr(Ⅵ)的分离与富集.处理后,废水中Cr(Ⅵ)含量小于0.5 mg/L,Cr(Ⅵ)的去除率达99.8%,达到国家排放标准;富集液中Cr(Ⅵ)浓度高达2 500 mg/L.该项技术在含铬废水的处理方面表现出良好的应用前景.
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