College of Chemical Engineering, Sichuan University, Chengdu 610065, China.
J Hazard Mater. 2010 Jun 15;178(1-3):130-5. doi: 10.1016/j.jhazmat.2010.01.052. Epub 2010 Jan 18.
This paper presents a comprehensive study on removal of chromium(III) from aqueous waste solution using emulsion liquid membrane (ELM). The study has highlighted the importance of emulsion stability for maximizing the removal of chromium(III). The ELM consists of tri-n-butyl phosphate (TBP) as a carrier, commercial kerosene as organic solvent, sulfonated liquid polybutadiene (LYF) as surfactant agent, sulfuric acid, deionized water or sodium hydroxide as stripping phase. The important factors studied which affected the ELM stability and removal of chromium(III) were the concentrations of surfactant (2-8% w/w), carrier (2-10% w/w), internal phase H(2)SO(4) [pH 0-6], deionized water [pH 6.65] and NaOH (0-0.8% w/w), transfer time (5-35 min) and the effect of volume ratio of the feed solution to the emulsion phase (Rf) (5:1-9:1). At the optimum condition it was possible to remove 99.71-99.83% of chromium(III) by using ELM. LYF was not only the surfactant but also played a key auxiliary effect for TBP combining with chromium(III) by studying on the transport mechanism.
本文对用乳状液膜（ELM）从含铬（III）废水溶液中去除铬（III）进行了全面研究。该研究强调了乳状液稳定性对于最大限度地去除铬（III）的重要性。ELM 由三丁基磷酸（TBP）作为载体、商用煤油作为有机溶剂、磺化液体聚丁二烯（LYF）作为表面活性剂、硫酸、去离子水或氢氧化钠作为反萃相组成。研究了影响 ELM 稳定性和铬（III）去除的重要因素，包括表面活性剂浓度（2-8%w/w）、载体浓度（2-10%w/w）、内相 H2SO4[pH0-6]、去离子水[pH6.65]和 NaOH（0-0.8%w/w）、传质时间（5-35min）以及进料溶液与乳状液相（Rf）的体积比（5:1-9:1）。在最佳条件下，使用 ELM 可以去除 99.71%-99.83%的铬（III）。通过研究传输机制，LYF 不仅是表面活性剂，而且还对 TBP 与铬（III）的结合起到了关键的辅助作用。
