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首页> 外文会议>XXVII Congress of the Mexican Society of Electrochemistry/5th Meeting of the ECS Mexican Section >Adsorption Study of Sodium Isopropyl Xanthate on Chalcopyrite
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Adsorption Study of Sodium Isopropyl Xanthate on Chalcopyrite

机译：黄铜矿对异丙基黄原酸钠的吸附研究

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摘要

This paper presents voltammetric and electrochemical impedance studies of the anodic oxidation of chalcopyrite in the presence of highly concentrated sodium isopropyl xanthate solutions. The voltammetric response of the system displays a passivating effect on the chalcopyrite surface with the addition of xanthate due to its adsorption, which also impedes the transportation of oxidized species, i.e., Fe~(2+) and Cu~(2+) from the mineral matrix outwards the interface. The impedance spectra obtained near the polarization potential, at which the passivating effect is observed in the voltammograms shows a pseudocapacitive effect in the system, which is associated to the adsorption of xanthate and blocking the interface. The impedance spectra obtained show three time constants associated with the oxidation reactions of chalcopyrite and xanthate and the formation of covellite and cuprous xanthate on the mineral surface, the E1S results are according to the voltammetric response obtained for the system.
机译：本文介绍了在高浓度异丙基黄药酸钠溶液存在下黄铜矿的阳极氧化的伏安和电化学阻抗研究。由于黄原酸酯的吸附，该系统的伏安响应在黄铜矿表面上表现出钝化作用，这也阻碍了氧化物质，即Fe〜（2+）和Cu〜（2+）从铜的迁移。矿物基质向外界面。在极化电位附近获得的阻抗谱（在伏安图中观察到钝化作用）显示了系统中的伪电容效应，这与黄药的吸附和阻塞界面有关。所获得的阻抗谱显示了与黄铜矿和黄药的氧化反应以及在矿物表面上形成黄铁矿和黄铁酸铜相关的三个时间常数，E1S结果取决于系统获得的伏安响应。

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