Adsorption characteristics of Pb(Ⅱ)ions on sulfidized hemimorphite surface under ammonium sulfate system  

作　　者：Xi Zhang Jiushuai Deng Yu Wang Sihao Li Honghui Zhao Chang Liu Zhitao Ma Zhenwu Sun 

机构地区：[1]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 [2]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 [3]Inner Mongolia Research Institute,China University of Mining and Technology-Beijing,Ordos 017001,China

出　　处：《International Journal of Mining Science and Technology》2023年第4期511-518,共8页矿业科学技术学报（英文版）

基　　金：the Fundamental Research Funds for the Central Universities(Nos.2022JCCXHH09 and 2022YJSHH01);the Yueqi Outstanding Scholar award of CUMTB;the National Key R&D Program of China(No.SQ2022YFC2900065);the Ordos Science&Technology Plan(No.202204);the National Natural Science Foundation of China(No.52274283);the Open Research Fund of State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization(No.CNMRCUKF2107)。

摘　　要：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 components to generate Pb S.Meanwhile,the intensity of ZnS decreased with the formation of PbS,demonstrating 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.

关 键 词：HEMIMORPHITE Sulfidation flotation Ammonium sulfate Pb(II)ions Adsorption characteristics 

分 类 号：TD923[矿业工程—选矿] TD952