In this work, selectrodialysis (SED) was used to separate arsenic (As(V)) from copper (Cu(II)) and zinc (Zn(II)) of acidic metallurgical process streams by integrating non-selective and selective membranes. The separation process is determined by the chemical speciation of the involved elements. In this case, As(V) is mainly present as anionic species (H₂AsO₄⁻), while Cu(II) and Zn(II) are mainly present as cationic species although partially complexed as neutral complexes (CuSO₄ and ZnSO₄). A lab set-up was used to conduct the experimental tests with different type of standard and monovalent selective ion-exchange membranes. The results obtained showed that by SED configuration it was possible to recover around 80 ± 0.2% of Cu(II), 87 ± 0.2% of Zn(II) and 95 ± 0.3% of As(V) from the feed solution to the rich-product streams with an energy consumption of 2.6 ± 0.2 kWh/kg CuSO₄+ZnSO₄. Furthermore, a Cu/Zn-rich stream with a purity of both divalent cations of 99.8% (0.02% of As(V)) was achieved by means of SED. Overall, the results herein gathered suggest that SED is an efficient separation technology for Cu(II) and Zn(II) recovery from mining and metallurgical acidic streams.

在这项工作中，通过整合非选择性膜和选择性膜，使用选择性渗析（SED）从酸性冶金工艺流的铜（Cu（II））和锌（Zn（II））中分离砷（As（V））。分离过程取决于所涉及元素的化学形态。在这种情况下，随着（V）是主要存在的阴离子物质（H ₂ ASO ₄ ^- ），而Cu（II）和Zn（II）主要存在作为阳离子种类虽然部分络合的中性配合物（的CuSO ₄和硫酸锌₄）。使用实验室设置对不同类型的标准和单价选择性离子交换膜进行实验测试。获得的结果表明，通过SED配置，可以从进料溶液中回收约80±0.2％的Cu（II），87±0.2％的Zn（II）和95±0.3％的As（V）。产物流的能耗为2.6±0.2 kWh / kg CuSO ₄ + ZnSO ₄。此外，借助于SED获得了具有两个99.8％（As（V）的0.02％）的两个二价阳离子的纯度的富含Cu / Zn的料流。总体而言，本文收集的结果表明，SED是从采矿和冶金酸性流中回收Cu（II）和Zn（II）的有效分离技术。