Abstract Chalcopyrite leaching in acidic ferric sulfate media was improved by addition of ethylene thiourea (ETU) in shaking flask tests with the iron-oxidizing bacterium acidithiobacillus ferrooxidans. In bioreactor experiments, ETU was able to solubilize the chalcopyrite even after the mineral was pre-leached under non-catalytic conditions. Surface analysis of leached chalcopyrite mineral specimens by scanning electron microscopy and energy dispersive X-ray spectroscopy showed that the ETU-treated chalcopyrite exhibited significant surface corrosion. The shape of the etching pits suggested anisotropic corrosion towards certain 111 planes. Bioleaching experiments performed in columns showed that ETU can enhance the copper extraction rate from low-grade chalcopyrite ore.

中文翻译：

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乙硫脲对黄铜矿浸出的催化作用

摘要 在摇瓶试验中加入亚乙基硫脲 (ETU) 改善了酸性硫酸铁介质中黄铜矿的浸出效果。在生物反应器实验中，即使在非催化条件下预浸矿物之后，ETU 也能够溶解黄铜矿。通过扫描电子显微镜和能量色散 X 射线光谱对浸出的黄铜矿矿物样品的表面分析表明，经 ETU 处理的黄铜矿表现出显着的表面腐蚀。蚀刻坑的形状表明对某些 111 平面的各向异性腐蚀。在柱中进行的生物浸出实验表明，ETU 可以提高低品位黄铜矿矿石的铜提取率。