首页|Adsorption characteristics of Pb(Ⅱ) ions on sulfidized hemimorphite surface under ammonium sulfate system
Adsorption characteristics of Pb(Ⅱ) ions on sulfidized hemimorphite surface under ammonium sulfate system
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In this work, the effect of ammonium sulfate on the adsorption characteristics of low-concentration Pb(II) ions on the sulfidized hemimorphite surface was comprehensively investigated. The results showed that ammonium sulfate could increase the maximum recovery of hemimorphite from 69.42％to 88.24％under a low concentration of Pb(II) ions. On the hemimorphite surface pretreated with ammonium sulfate, the adsorption of Pb(II) ions was enhanced and the main species of Pb adsorbed was changed from Pb―O/OH to PbS. This was due to the larger amount of ZnS providing more effective adsorption sites for Pb compo-nents to generate PbS. Meanwhile, the intensity of ZnS decreased with the formation of PbS, demonstrat-ing that ZnS was covered by PbS which formed later on the mineral surface. It was beneficial for the adsorption of butyl xanthate on the hemimorphite surface to form more hydrophobic substances. As a result, ammonium sulfate played a crucial role in realizing the efficient recovery of hemimorphite.
Xi Zhang、Jiushuai Deng、Yu Wang、Sihao Li、Honghui Zhao、Chang Liu、Zhitao Ma、Zhenwu Sun
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Key Laboratory of Separation and Processing of Symbiotic-Associated Mineral Resources in Non-ferrous Metal Industry,School of Chemical&Environmental Engineering,China University of Mining&Technology-Beijing,Beijing 100083,China
Engineering Technology Research Center for Comprehensive Utilization of Rare Earth,Rare Metal and Rare-Scattered in Non-ferrous Metal Industry,China University of Mining and Technology-Beijing,Beijing 100083,China
Inner Mongolia Research Institute,China University of Mining and Technology-Beijing,Ordos 017001,China
Fundamental Research Funds for the Central UniversitiesFundamental Research Funds for the Central UniversitiesYueqi Outstanding Scholar award of CUMTBNational Key R&D Program of ChinaOrdos Science&Technology PlanNational Natural Science Foundation of ChinaOpen Research Fund of State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization
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