工程科学学报2016，Vol.38Issue(4)：461-467,7.DOI:10.13374/j.issn2095-9389.2016.04.003
Cu（II）、Ni（II）离子在蛇纹石表面的吸附及对其浮选的影响
Effect of Cu(II) and Ni(II) adsorption on serpentine flotation
摘要
Abstract
The adsorption and activation mechanisms of Cu2+ and Ni2+ ions on serpentine were investigated through adsorption measurements, pure mineral flotation tests and IR spectra analyses. It is found that the adsorption of Cu2+ and Ni2+ ions on serpentine agrees with the second order kinetics model, and the isothermal adsorption process correlates well with the Langmuir isotherm model. The adsorption is a spontaneous process, which is caused jointly by physical and chemical functions. The adsorption amount of Cu2+and Ni2+ ions on serpentine increases with increasing pН values. Under a weak alkaline condition, serpentine can be activated by Cu2+ and Ni2+ ions. The active sites can be formed on the surface of serpentine after being reacted with hydroxide and hydroxy com-plexes of copper and nickel, on which xanthates can be adsorbed to generate copper and nickel xanthates. These hydrophobic products improve the surface hydrophobicity of serpentine and thus activate its flotation.关键词
浮选/蛇纹石/铜/镍/吸附/活化/机理Key words
flotation/serpentine/copper/nickel/adsorption/activation/mechanisms分类
矿业与冶金引用本文复制引用
曹永丹,曹钊,张亚辉,孙传尧,张金山..Cu（II）、Ni（II）离子在蛇纹石表面的吸附及对其浮选的影响[J].工程科学学报,2016,38(4):461-467,7.基金项目
国家自然科学基金资助项目(51174154) （51174154）
内蒙古自然科学基金资助项目(2014MS0521) （2014MS0521）
