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Study of H2O adsorption on sulfides surfaces and thermokinetic analysis
Cuihua Zhao,Jian-Hua Chen,Xianhao Long,Jin Guo 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.2
Adsorption of water on mineral surfaces was studied using density functional theory andmicrocalorimetry technique. The calculation results show that galena and molybdenite are hydrophobic,while pyrite and sphalerite is hydrophilic. Thermokinetic analysis shows that the heat of adsorption is indecreasing order of pyrite, sphalerite, galena and molybdenite, which is in good agreement with thecalculation results. The adsorption kinetics parameters of hydrophobic galena and molybdenite surfacesare close, while those of hydrophilic pyrite and sphalerite surfaces are very different. The adsorption rateof water on the sphalerite surface is larger than that of water on the pyrite surface.