Dynamics of electrodeposition of tetraethylthioram disulphide(TETD) on pyrite surface

查看全文 作　　者：QIN Wen-qing,QIU Guan-zhou,HU Yue-hua,XU Jing (Department of Mineral Enginering, Central South University, Changsha 410083, Ch ina)

出　　处：《Journal of Central South University》索引2001年第13卷第3期,共5页

基　　金：TheSpecialFundfortheNationalExcellentDoctoralThesis(2 0 0 0 47) 摘　　要：The electrode process of pyrite in diethyldithiocarbamate (DDTC) solution pH 11.4 was investigated by using cyclic voltammetry, potentiost atic and chronopotentiometry. Tetraethylthioram disulphide(TETD) was electrodepo sited on pyrite electrode surface as the electrode potential is higher than 0.2 V. The relationship of the current density caused by diffusion and reaction time can be ascertained as i =1/(9.08×10 -5 +4.77×10 -3 t 0.5 ) , and the diffusion coefficient of DDTC on pyrite surface is about 3.72×10 - 6 cm 2/s. At pH 11.4, the thickness of TETD adsorbed on pyr ite surface is about 1.63 molecule layer. The electrochemical dynamics equation of the reduction of TETD on pyrite surface is given as η =0.116-0.064log[1- ( t/τ ) 0.5 ]. The kinetic parameters were determined as follows: the ex change current density ( i 0) is 3.08 μA/cm 2; the transmission coeffi cient( α ) is 0.462. 关键词：ELECTRODE process PYRITE ELECTROCHEMISTRY of FLOTATION

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Dynamics of electrodeposition of tetraethylthioram disulphide(TETD) on pyrite surface

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