在现有支撑液膜分离技术的理论研究基础上,探索合适的液膜分离体系,研究了Pb(Ⅱ)在PC-88A-煤油-HCI分散支撑液膜体系中的传输行为;考察了料液pH值、膜溶液与解析剂体积比、解析相中HCI浓度以及Pb(Ⅱ)的起始浓度对Pb(Ⅱ)传输的影响.结果表明,以HCI为解析剂,料液相pH=5.25、膜溶液与解析剂体积比为160:40、解析相中HCI浓度为5.00mol/L时,该分散支撑液膜体系对金属Pb(Ⅱ)具有良好的传输作用.在选取的最佳传输条件下,料液相中Pb(Ⅱ)的初始浓度为3.00×10-4mol/L时,传输190min,传输率可达88.9%,而传统支撑液膜只有72.3%.分散支撑液膜不仅具有较高的传输效率,而且膜体系稳定,膜的使用寿命长.
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