Recovery of Iron, Nickel, and Copper in Waste Water from Printed Circuit Board Manufacture by Electrodialysis Method

• Published in: Russian journal of applied chemistry 2021-05, Vol.94 (5), p.555-559
• Main Authors: Shestakov, K. V., Lazarev, S. I., Polyanskii, K. K., Ignatov, N. N.
• Format: Article
• Language: English
• Subjects: Anions; Cations; Chemistry; Chemistry and Materials Science; Chemistry/Food Science; Circuit boards; Coefficients; Copper; Electrodialysis; Ferric ions; Heavy metals; Industrial Chemistry/Chemical Engineering; Inorganic Synthesis and Industrial Inorganic Chemistry; Ion exchange; Ion flux; Ion transport; Iron; Nickel; Printed circuits; Retention; Saline solutions; Wastewater
• ISSN: 1070-4272; 1608-3296
• DOI: 10.1134/S1070427221050013

The electrodialysis method is used to recover iron, nickel and copper from waste water generated in the manufacture of printed circuit boards. The objects of study were ion-exchange membranes PC Acid 60 (PCCell GmbH) and CM (H) RALEX ® (MEGA) and model solutions containing heavy metal ions (Fe 3+ , Ni 2+ , and Cu 2+ ) and SO 4 2– и NO 3 – anions. The time dependences of the retention coefficients of the Fe 3+ , Ni 2+ , and Cu 2+ cations were constructed, the degree of treatment of the solutions to remove the SO 4 2– и NO 3 – anions was determined, and the ion fluxes and ion transport numbers were calculated. On separating solutions containing one and all three salts of the target metals, the retention coefficients of Ni 2+ and Cu 2+ cations differ significantly, whereas those of Fe 3+ cations, on the contrary, differ by no more than 2–3%. On separating a multicomponent three-salt solution, the retention coefficients of Ni 2+ and Cu 2+ cations are decreased in comparison with the corresponding values for single-salt solutions. For the purpose of exhaustive metal recovery, the electrodialysis separation of multicomponent solutions is the most efficient method, as applied to Fe 3+ and Cu 2+ cations.