乳状液膜分离富集氟离子的应用研究.pdfVIP

学兔兔 化 工 进 展 · 2304· CHEMICAL INDUSTRY AND ENGINEERING PROGRESS 20 1 4年第33卷第9期 乳状液膜分离富集氟离子的应用研究 李兴扬，王茹，张旭，叶贤伟 (安徽工程大学生物与化学工程学院，安徽 芜湖 241000) 摘要：乳状液膜在分离富集溶液中的微量物质方面获得广泛的应用，本文研究了其对溶液中氟离子的分离富集效 果，确定了制备稳定乳状液膜的条件：乳化剂(T-154)：膜增强剂(液体石蜡)：溶剂 (煤油)=3：2：95(体 积比)，内水相为3％~4j A12(so4)3溶液，油内比为1：O．6；讨论了分离富集条件，包括乳水比、溶液pH值、搅 拌速度和富集时间等因素；应用于环境水样中氟离子的测定，加标回收率为96％--103％，相对标准偏差RSD(n=6) 为2．0％～4．8％，结果令人满意。指出该方法操作简单、成本低、效率高，可用于分离富集废水中的氟离子。 关键词：乳液；液膜；分离；氟；表面活性剂；废水 中图分类号：TQ 028．8 文献标志码：A 文章编号：1000—6613(2014)09—2304—06 DOI：10．3969~．issn．1000．6613．2014．09．012 Separation and prec0ncentrati0n of fluoride by emulsion liquid membrane system LIXingyang，WANG Ru，ZHANGXu，YEXianwei (College ofBiological and Chemical Engineering，Anhui Polytechnic University，Wuhu 241000，Anhui，China) 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-1 54 to liquid paraffin to kerosene was 3．：2： 95，the mass concentration ofA12(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 determ ined with the prepared emulsion．The results showed that th