Korean Journal of Materials Research, Vol.11, No.2, 76-81, February, 2001
염산 수용액 중에서 Au와 Pd의 전기화학적 거동에 관한 연구
A Study on the Electrochemical Behavior of Au and Pd in Hydrochloric Acidic Solution
초록
전자산업 폐기물의 산침출 용액으로부터 전해채취법에 의해 Au와 Pd를 선택적으로 회수하기 위하여, 염산수용액 중에서 Au와 Pd의 전기화학적 거동을 voltammetry방법에 의해 조사하였다. Au단독 전해욕에서 Au의 환원전위는 약 800mV이었고 환원한계전류는 약 470mV에서 나타났으며, Pd 단독 전해욕에서 Pd의 환원전위는 약 500mV이었고 환원한계전류는 약 150mV에서 나타났다. 그러나, Au-Pd혼합 전해용액에서, Au의 환원전위 및 환원한계전위 값은 전해욕 중 Pd의 농도가 증가함에 따라 감소하였고, Au와 Pd의 환원한계전위 값은 Au-Pd 전해욕 중 Pd 전해용액의 함유량이 30vo1%일 때 가장 가까운 값을 나타내었다.
In order to recover Au and Pd from the leaching solution of various electronic wastes by electrowinning, the electrochemical behavior of Au and Pd in hydorchloric acidic solution was investigated by means of voltammetry. The reduction potential of Au ion was 800mV and the limiting current appeared at 470mV in electrolytic solution of gold. The reduction potential of Pd ion was 500mv and the limiting current appeared at 150mV in electrolytic solution of Palladium. However, in Au-Pd electrolytic solution, the Potentials for reduction and the limiting current of Au decreased as the content of Pd in electrolyte increased, and the potentials for the limiting current of Au and Pd closed nearest together when percentage of Pd electrolytic solution was 37v71% in Au-Pd electrolyte.
- Muresan L, Maurin G, Oniciu L, Gaga D, Hydrometallurgy, 43, 345 (1996)
- Chatelut M, Gobert E, Vittori O, Hydrometallurgy, 43, 287 (1996)
- Masuko N, Mushiake K, Kokike K, Journal of the Mining and Materials Processing Institute of Japan, 109(10), 791 (1993)
- Lin HK, Zheng ZM, Hydormetallurgy, 42, 411 (1996)
- Gomez C, Figueroa M, Munoz J, Blazquez ML, Hydrometallurgy, 43, 331 (1996)
- Fukushima H, Akiyama T, Kiyoutani K, Jour-nal of the Mining and Materials Processing Insti-tute of Japan, 109(11), 861 (1993)
- Yamashita S, Nagatsuma K, Hata K, Goto S, Journal of the Mining and Materials Processing In-stitute of Japan, 109(5), 341 (1993)
- Isizaki T, Saito N, Fuwa A, Journal of the Mining and Materials Processing Institute of Japan, 116(3), 217 (2000)
- 藤山鳥昭, 相澤益男, 井上撤, 電氣化學測定法, 技報堂出版株式會社, 168 (1984) (1984)