| Title |
Application of selectrodialysis for the removal of As from metallurgical process waters: Recovery of Cu and Zn |
| ID_Doc |
25644 |
| Authors |
Reig, M; Vecino, X; Valderrama, C; Gibert, O; Cortina, JL |
| Title |
Application of selectrodialysis for the removal of As from metallurgical process waters: Recovery of Cu and Zn |
| Year |
2018 |
| Published |
|
| DOI |
10.1016/j.seppur.2017.12.040 |
| Abstract |
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. |
| Author Keywords |
Monovalent selective cationic membrane; Circular economy; Valorization; Arsenic removal; Metal recovery |
| Index Keywords |
Index Keywords |
| Document Type |
Other |
| Open Access |
Open Access |
| Source |
Science Citation Index Expanded (SCI-EXPANDED) |
| EID |
WOS:000425077100045 |
| WoS Category |
Engineering, Chemical |
| Research Area |
Engineering |
| PDF |
https://hdl.handle.net/2117/113827
|