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《GEOCHIMICA》 1996-01
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AN EXPERIMENTAL STUDY OF ADSORPTION OF GOLD COMPLEXES BY PYRITE FROM DIFFERENT DEPOSITS

Zhang Shibai;Wu Daqing;Xie Xiande(Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640)  
The experimental study of adsorption of gold complexes by pyrite in dilute solutions shows the fundamental role of adsoaption in gold mineralization. The result of adsorption of gold hydrosulphido-complexes by pyrite is different from that of gold chloride complexes. These two kinds of complexes have different mechanism of adsorption. The former is associated with surface complex and electrosorption. There exists obvious discrepancy in adsorption density between different pyrites. The surface characteristics of minerals and heterogeneous catalysis may play an important role in adsorption. The coexistence of Au, As and p-type pyrite indicates the effect of As on adsorption. Gold chloride complexes are easily reduced by pyrite.
【Fund】: 国家自然科学基金
【CateGory Index】: P618.510.4
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