화학공학소재연구정보센터
Applied Chemistry, Vol.2, No.1, 372-375, May, 1998
질산용액에서 은의 전착회수
Removal of Silver by Electrodeposition in Nitric Acid Solution
The removal of silver in nitric acid solution was carried out by the electrodeposition in a conventional three electrode H-cell in order to investigate the possibility of the direct electrolytic removal as an alternative to a chemical treatment process. The silver ion could be removed in nitric acid concentrations of less than 3 M with a good removal efficiency. The lower concentration of the nitric acid End the lower temperature, the greater removal efficiency could be obtained. Potential shift occurred at the time when the hydrogen evolution reaction took place along with the depletion of almost all silver in the nitric acid solution and it could be known that the electrolysis should be completed to obtain the maximum removal efficiency. Consequently, the possibility of the silver removal by electrodeposition in nitric acid solution as an alternative to a chemical treatment process was confirmed.