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

Xi Zhang ¹Jiushuai Deng ²Yu Wang ³Sihao Li Honghui Zhao Chang Liu Zhitao Ma Zhenwu Sun

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作者信息

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
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Abstract

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.

Key words

Hemimorphite/Sulfidation flotation/Ammonium sulfate/Pb(Ⅱ) ions/Adsorption characteristics

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基金项目

Fundamental Research Funds for the Central Universities(2022JCCXHH09)

Fundamental Research Funds for the Central Universities(2022YJSHH01)

Yueqi Outstanding Scholar award of CUMTB()

National Key R&D Program of China(SQ2022YFC2900065)

Ordos Science&Technology Plan(202204)

National Natural Science Foundation of China(52274283)

Open Research Fund of State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization(CNMRCUKF2107)

出版年

2023

矿业科学技术学报(英文版)

中国矿业大学

矿业科学技术学报(英文版)

CSTPCDCSCD北大核心EI

影响因子：1.222

ISSN：2095-2686

参考文献量7

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