论文部分内容阅读
选择内耦合液膜技术,以CHCl3为膜溶剂,1,4,7,10,13,16-六硫杂-18冠-6(HT18C6)为流动载体,研究Ag(I)在(HT18C6-CHCl3)液膜体系中的迁移过程.考察了载体的种类和浓度、料液相浓度、接受相的种类、浓度和pH值、搅拌速度以及温度等因素对Ag(I)离子迁移过程的影响.结果表明,在最佳迁移条件下:载体浓度为5.0×10-4mol/L、料液相NaClO4浓度为5.0×10-3mol/L、接受相Na2S2O3浓度为0.05mol/L、搅拌速度为120r/min、工作温度控制在293～313K范围内,Ag(I)的迁移率可达到99%以上.同时Hg(Ⅱ),Mg(Ⅱ),Ca(Ⅱ),Ni(Ⅱ),K(I),Na(I),Cr(Ⅲ),Zn(Ⅱ),Cu(Ⅱ),Pb(Ⅱ)和Cd(Ⅱ)等共存金属离子对Ag(I)的迁移无影响.对废定影液样品中Ag(I)进行迁移富集,银的回收率在99.3%～99.8%.
In this study, we chose the in-coupling liquid membrane technology to study the effect of Ag (I) on the growth of (HT18C6-CHCl3 ) Liquid membrane system.It was investigated that the factors such as carrier type and concentration, liquid phase concentration, acceptor phase, concentration and pH value, stirring speed and temperature on the migration of Ag (I) ion.Results The results showed that under optimum conditions, the carrier concentration was 5.0 × 10-4mol / L, the concentration of NaClO4 in the liquid phase was 5.0 × 10-3mol / L, the concentration of Na2S2O3 in the acceptor phase was 0.05mol / L and the stirring speed was 120r / min , The operating temperature is controlled within the range of 293 ~ 313K, the mobility of Ag (I) can reach more than 99%, and the Hg (Ⅱ), Mg (Ⅱ), Ca The coexistence of metal ions such as Na (I), Cr (Ⅲ), Zn (Ⅱ), Cu (Ⅱ), Pb (Ⅱ) and Cd (Ⅱ) had no effect on the migration of Ag (I) for migration and enrichment, silver recovery rate of 99.3% ~ 99.8%.