Kinetics of electrochemical process of<BR>galena electrode in diethyldithiocarbamate solution

ISSN: 1003-6326
CN: 43-1239/TG
CODEN: TNMCEW

Vol. 11 No. 4 August 2001

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Kinetics of electrochemical process of
galena electrode in diethyldithiocarbamate solution

QIN Wen-qing(覃文庆), QIU Guan-zhou(邱冠周),
HU Yue-hua(胡岳华), XU Jing(徐竞)

(Department of Mineral Processing, Central South University,
Changsha 410083, P.R.China)

Abstract: The electrode process of galena in diethyldithiocarbamate (DDTC) solution at pH 11.4 has been investigated using cyclic voltammetry, potentiostatic and chronopotentiometry. Electrodeposit of PbD₂ on galena electrode surface can occur while the electrode potential is higher than -0.05V. The relationship between the current density caused by diffusion and reaction time has been ascertained, and the diffusion coefficient of DDTC on galena surface in DDTC solution is about 1. 12×10^-6 cm²/s. A passive PbD₂ film covers the surface of galena electrode.

Key words: electrode process; galena; electrochemistry of flotation

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