Electrode process of diethyldithiocarbamate on surface of pyrrhotite
- 41 Downloads
The electrode process of diethyldithiocarbamate on the surface of pyrrhotite was studied using systematic electrochemical analysis, including cyclic voltammetry, chronopotentiometry and galvanostatic. Experimental results show that tetraethylthioram disulphide (TETD) is electrodeposited on pyrrhotite electrode surface in the presence of 1.0×10−4 mol/L diethyldithiocarbamate when the electrode potential is higher than 0.25 V. The electrochemical kinetics parameters of the electrode process of diethyldithiocarbamate on surface of pyrrhotite are calculated as follows: the exchange current density is 2.48 µA/cm2, and the transmission coefficient is 0.46. The electrodeposition includes two steps electrochemical reaction. The first reaction is electrochemical adsorption of diethyldithiocarbamate ion, then the adsorbed ion associates with a diethyldithiocarbamate ion from the solution and forms tetraethylthioram disulphide on the surface of pyrrhotite.
Key wordselectrode process pyrrhotite diethyldithiocarbamate
Unable to display preview. Download preview PDF.
- WANG Dian-zuo, GU Guo-hua, LIU Ru-yi. Potential adjustment flotation of galena-lime-diethyldithiocarbamate system [J]. Chinese Journal of Nonferrous Metals, 1998, 8(2): 322–326. (in Chinese)Google Scholar
- LI Quan, QIU Guan-zhou, QIN Wen-qing, et al. Kinetics of electrochemical process of pyrite electrode in diethyldithiocarbamate solution[J]. Mining and Metallurgical Engineering, 2001, 21(2): 30–33. (in Chinese)Google Scholar
- Bhaskar R G, Forsling W. Adsorption mechanism of diethyldithiocarbamate on covellite, cuprite and tenorite[J]. Colloids and Surfaces, 1991, 60(26): 53–69.Google Scholar
- Valli M, Persson I. A vibration and X-ray photoelectron spectroscopic study of the interaction between chalcopyrite, marcasite, pentlandite, pyrrhotite and troilite, and ethylxanthate and decylxanthate ions in aqueous solution[J]. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 1994, 83(3): 207–217.CrossRefGoogle Scholar