乳状液膜法破乳及膜相重复利用研究

Study on Demulsification and Repeated Using of Emulsion Liquid Membranes

以NH3·H2O为内水相试剂,采用乳状液膜法提取溶液中的Ni2+,对提取镍后的乳液进行破乳,对离心破乳法、超声波破乳法、加热破乳法、以及加热-离心联合法进行实验研究。实验结果表明,采用加热-离心联合破乳法效果理想,破乳率可达98%。膜相经四次重复利用后,乳液对镍的提取效率仍可达90%。

An emulsion liquid membrane （ELM） process of Span80-TBP-NH3 · H2O extract Nickel（Ⅱ） from waste water has been presented.The main purpose of this paper was to study on demulsification and repeated using of membrane phase.Ultrasonic demulsification,centrifugal demulsification,heating demulsification,and heating-centrifugal demulsification were used in our work.The result indicated that：by heating-centrifugal combined emulsion breaking,the emulsion breaking rate may reach 98％.Additionally,the membrane phase can be recovered,and the removing rate of Nickel（Ⅱ） was still up to 90％ after being used for four times.