A future application of pulse plating – silver recovery from hydrometallurgical bottom ash leachant

H. Elomaa, P. Halli, T. Sirviö, K. Yliniemi, M. Lundström
2018 Transactions of the Institute of Metal Finishing  
Elomaa, H.; Halli, P.; Sirviö, T.; Yliniemi, K.; Lundström, M. A future application of pulse plating-silver recovery from hydrometallurgical bottom ash leachant Lundström, M. (2018). A future application of pulse plating-silver recovery from hydrometallurgical bottom ash leachant. Transactions of the Institute of Metal Finishing, 96(5), 253-257. https://doi. Abstract In the current study, electrodeposition-redox replacement was applied for hydrometallurgical solution with the main elements of
more » ... main elements of Ca (13.8 g/L), Al (4.7 g/L), Cu (2.5 g/L), Zn (1.2 g/L), Fe (1.2 g/L), S (1 g/L), Mg (0.8 g/L), P (0.5 g/L) and Ag (3.5 ppm). The solution originated from the leaching experiment of incinerator plant bottom ash, which was dissolved into 2 M HCl media at T = 30 °C. The resulting deposit on electrode surface was analysed with SEM-EDS and the observed Ag/(Cu+Zn) ratio (0.3) indicated remarkable enrichment of silver on the surface, when compared to the ratio of these elements (Ag/(Cu+Zn)) in the solution (6.8•10 -5 ). The enrichment of Ag vs. (Cu+Zn) could be demonstrated to increase ca. 4500 fold compared to ratio of the elements in solution.
doi:10.1080/00202967.2018.1507320 fatcat:2yenvie6gvd75lbkfmdm3ewczu