HA／煤油／NaOH微乳体系萃取废水中Cd2＋和Zn2＋的研究

江汉大学学报（自然科学版） ›› 2012, Vol. 40 ›› Issue (2): 35-38.

HA／煤油／NaOH微乳体系萃取废水中Cd2＋和Zn2＋的研究

周富荣，雷新

江汉大学化学与环境工程学院，湖北武汉430056

出版日期:2012-04-20 发布日期:2013-11-07

Research into Extraction of Cd2+ and Zn2+ in Wastewater by Microemulsion System of HA/kerosene/NaO

HZHOU Fu－rong,LEI Xin

School of Chemistry and Environmental Engineering,Jianghan University,Wuhan 430056,Hubei

Online:2012-04-20 Published:2013-11-07

摘要/Abstract

摘要： 研究了NaOH皂化HA的微乳体系的配方，通过HA／煤油／NaOH微乳体系萃取分离含Cd2＋、Zn2＋废水的研究，考察了HA与煤油的体积比、NaOH的浓度、乳水比、萃取分离时间等因素对Cd2＋、Zn2＋萃取率的影响。实验结果表明，当HA与煤油的体积比为1∶2.5，NaOH浓度为1.5mol／L，乳水比为1∶3(体积比)时，萃取6min，该微乳体系对Cd2＋和Zn2＋的单级萃取率分别为99.23％和97.51％。通过调节萃取相的pH值和适当的油水比，可较好地实现反萃取和油相的回收，当调节油相pH为1、油水比为1∶3时，Cd2＋和Zn2＋的反萃率分别为98.29％和97.38％。研究表明，该微乳体系具有稳定性好、工艺简单、成本低、膜相可自动破乳、油相可重复使用、萃取效率高等优点。

关键词: 微乳液, 二-(2-乙基己基)磷酸酯, 镉离子, 锌离子, 萃取, 反萃取

Abstract: The formula for microemulsion system with saponified HA of NaOH has been studied. Through extraction test to Cd2＋ and Zn2＋ from feed phase using the microemulsion system of HA／kerosene／NaOH, different factors effecting extraction rate of Cd2＋ and Zn2＋, such as the mass ratio of HA, the concentration of NaOH, the ratio of volume between microemulsion and feed phase were investigated. The experimental results show the primary extraction rate of Cd2＋ was 99.23 ％ and the Zn2＋ was 97.51 ％ when the volume ratio of HA to kerosene was 1∶2.5,the concentration of NaOH was 1.5 mol／L, the ratio of volume between microemulsion and wastewater was 1∶3, the extraction time was 6 min. And the experimental results show the rextraction rate of Cd2＋ was 98.29 ％ and the Zn2＋ was 97.38 ％ when the pH of the oil phasead justed to 1 and the ratio of volume between oil phasead and water was 1∶3. This microemulsion system exhibits several advantages including good stability, simple process, lower cost,high efficiency of extraction.

Key words: microemulsion, HA, Cd2+, Zn2+, extraction, rextraction

中图分类号:

TQ028

周富荣，雷新. HA／煤油／NaOH微乳体系萃取废水中Cd2＋和Zn2＋的研究[J]. 江汉大学学报（自然科学版）, 2012, 40(2): 35-38.

HZHOU Fu－rong,LEI Xin. Research into Extraction of Cd2+ and Zn2+ in Wastewater by Microemulsion System of HA/kerosene/NaO[J]. Journal of Jianghan University(Natural Science Edition), 2012, 40(2): 35-38.

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