【摘要】 采用接触角、原位原子力显微镜、循环伏安和X射线光电子能谱研究了O-异丙基-S-[2-（羟基亚氨基）丙基]二硫代碳酸酯（IPXPO）对黄铜矿的吸附机理。接触角和原位原子力显微镜结果表明，IPXPO吸附在黄铜矿表面，增加了表面的疏水性和粗糙度。CV实验结果证实IPXPO吸附在黄铜矿表面形成了一层钝化膜。XPS光谱结果进一步揭示IPXPO分子中的巯基S原子、肟基N原子和O原子可能与铜原子反应分别形成Cu—S,Cu—N和Cu—O键。人工混合矿物浮选试验表明，在p H=6.79,IPXPO初始浓度5×10^-5 mol/L的条件下，黄铜矿的浮选回收率达到90%，而黄铁矿的浮选回收率仅25%，说明IPXPO是一种良好的分离富集黄铜矿的浮选捕收剂。更多还原

【Abstract】 The adsorption mechanism of O-isopropyl-S-[2-（hydroxyimino） propyl] dithiocarbonate ester（IPXPO） to chalcopyrite was investigated by using contact angle, in-situ atomic force microscopy（in-situ AFM）, cyclic voltammetry（CV） and X-ray photoelectron spectroscopy（XPS）. The results of contact angle and in-situ AFM demonstrated that IPXPO adsorbed on chalcopyrite increases surface hydrophobicity and roughness. It was found by CV experiments that a layer passive film was formed. The results of XPS spectra further revealed that the thiol S atom, oxime N atom, and O atom in the IPXPO molecule might react with copper atoms to form Cu—S, Cu—N, and Cu—O bonds, respectively. An artificial mixed minerals flotation test indicated that under the condition of pH=6.79 and IPXPO initial concentration 5×10^-5 mol/L, the flotation recovery of chalcopyrite reached about 90%, while for pyrite only 25%, suggesting that IPXPO is an excellent collector for flotation separation and enrichment of chalcopyrite.更多还原