| Electrodeposition of dixanthogen（TETD） on pyrite surface |
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| 作者单位： | School of Mineral Processing and Bioengineering Central South University，School of Mineral Processing and Bioengineering，Central South University，School of Mineral Processing and Bioengineering，Central South University，School of Mineral Processing and Bioengineering，Central South University，Changsha 410083，China，Changsha 410083，China，Changsha 410083，China，Changsha 410083，China |
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| 摘 要： | The electrochemical reaction of xanthate on the surface of pyrite was studied using cyclic voltammogrametry, chronopotentiometry and rotating-disc electrode measurements.Experimental results demonstrate that the first step in the reaction is electrochemical adsorption of xanthate ion,and then the adsorbed ion associates with a xanthate ion from the solution and forms a dixanthogen on the pyrite electrode surface.The diffusion coefficient of butyl xanthate on pyrite electrode surface can be determined to be about 1.09×10- 6cm2/s.Using the galvanostatic technique,the kinetic parameters of oxidation of the butyl xanthate ion on the pyrite surface are calculated as Ja=200μA/cm2 ,β=0.203 and J0=27.1μA/cm2.
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| 关 键 词： | 黄铁矿 电化学 计时电势分析法 化学吸附 趋电性 |
| 收稿时间： | 2003-07-20 |
| 修稿时间： | 2006-10-28 |
Electrodeposition of dixanthogen(TETD) on pyrite surface |
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| Authors: | LI Wei-zhong QIN Wen-qing SUN Wei QIU Guan-zhou |
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| Affiliation: | School of Mineral Processing and Bioengineering, Central South University, Changsha 410083, China |
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| Abstract: | The electrochemical reaction of xanthate on the surface of pyrite was studied using cyclic voltammogrametry, chronopotentiometry and rotating-disc electrode measurements. Experimental results demonstrate that the first step in the reaction is electrochemical adsorption of xanthate ion, and then the adsorbed ion associates with a xanthate ion from the solution and forms a dixanthogen on the pyrite electrode surface. The diffusion coefficient of butyl xanthate on pyrite electrode surface can be determined to be about 1.09×10?6 cm2/s. Using the galvanostatic technique, the kinetic parameters of oxidation of the butyl xanthate ion on the pyrite surface are calculated as Ja = 200 μA/cm2, β = 0.203 and J0=27.1 μA/cm2. |
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| Keywords: | electrochemical reaction pyrrhotite xanthate |
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