乳状液膜法处理含铬废水的研究

Study on extraction of chromium (Ⅵ) in wastewater with emulsion liquid membranes

采用以磷酸三丁酯(TBP)为载体、T152为表面活性剂、磺化煤油为膜溶剂、液体石蜡为膜增强剂、NaOH为内相试剂的乳状液膜体系提取分离废水中的铬(Ⅵ)。在探明料液pH值、内水相NaOH浓度、T152浓度、载体用量以及乳水比和油内比对提取效率影响的基础上,确立了最适分离条件。结果表明,含铬(Ⅵ)废水经处理后,去除率达99%以上,铬(Ⅵ)残留量<0.5mg/L,能达到排放标准。

The extraction of Cr（Ⅵ） with emulsion liquid membrane has been investigated. The effect of various factors on the extractive result have been examined and discussed. The suitable composition of liquid membrane and technological operating conditions ware determined. Experimental results showed that extraction efficiency of Cr（Ⅵ） is onto 99.5%. The effluent could accorded with the standard.