关键词: 乳液, 液膜, 分离, 氟, 表面活性剂, 废水

Abstract: Emulsion liquid membrane system containing mobile carrier is widely applied in separation and preconcentration of trace substances in solution. In this paper，the separation performance for fluoride was studied by the emulsion liquid membrane. Established stable conditions of the emulsion liquid membrane were as follows：the volume ratio of T-154 to liquid paraffin to kerosene was 3∶2∶95，the mass concentration of Al2(SO4)3 used as the internal phase was 3%，and the ratio of oil phase to internal phase was 1∶0.6. The separation conditions including the ratio of emulsion to external phase，the value of pH，stirring speed and enrichment time were investigated. The fluoride in the environmental water was determined with the prepared emulsion. The results showed that the recovery of standard addition was 96%—103%，the relative standard deviation was 2.0%—4.8%. The method of separation and preconcentration of fluoride had the advantages of simple operation，low-cost and high efficiency.

Key words: emulsions, liquid membranes, separation, fluoride, surfactants, waste water