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本文研究了丁基黄药在磁黄铁矿表面氧化的电化学过程。热力学和循环伏安研究表明丁黄药离子在磁黄铁矿表面氧化形成双黄药 ;恒电流阶跃法导出了氧化过程的电化学动力学方程 η =0 0 98-0 0 74lg〔1-(t/τ) 1/ 2 〕 (V) ,利用动力学参数可以定量地描述氧化速率 ;计时电量法的研究确定了磁黄铁电矿电极表面双黄药吸附层厚度随着 pH值升高而变薄 ,在 pH =6 82、 9 18和 11 0的条件下 ,吸附层厚度分别为 3 0 9、 2 14和 0 98个单分子层
In this paper, the electrochemical oxidation of butyl xanthate on the surface of pyrrhotite has been studied. Thermodynamics and cyclic voltammetry studies showed that butylated hydroxylamine pyrithione formed on the surface of pyrrhotite to form xanthate. The galvanostatic kinetic equation of the oxidation process was derived by the constant current step method. Η = 0 0 98-0 0 74lg [1- (t / τ) 1/2] (V), the kinetic parameters can be used to describe the oxidation rate quantitatively. The study of timed electricity method shows that the thickness of the adsorbent layer on the surface of the pyrrhotic pyrrole electrode increases with the increase of pH value While the thickness of the adsorbed layer was respectively 300, 2 14 and 98 monolayers at pH = 6 82, 9 18 and 11 0