화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.23, 307-315, March, 2015
DOI10.1016/j.jiec.2014.08.034  Export Citation
Removal of Cu2+ from aqueous solution by adsorption onto mercapto functionalized palygorskite
Jun Han1, 2, Xuefeng Liang3, Yingming Xu3, †, and Yuanjian Xu1, 2, †
  • 1Division of Ecological and Environmental Research on the Three Gorges, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, PR China
  • 2Key Laboratory of Reservoir Aquatic Environment, Chinese Academy of Sciences, Chongqing, 400714, PR China
  • 3Key Laboratory of Original Environmental Quality of MOA, Agro-Environmental Protection Institute of Ministry of Agriculture, Tianjin, 300191, PR China
E-mail:,
In order to enhance sorption capacity of palygorskite for heavy metals, mercapto functionalized palygorskite (MPAL) were prepared and utilized for the sorption of Cu2+ from aqueous solution. Sorption kinetic and thermodynamic experiments were conducted to assess the sorption behavior and application potentials for the remediation of heavy-meta-polluted soil. Sorption mechanisms were investigated by XRD, FT-IR, 29Si CP/MAS NMR, SEM-EDS and XPS in detail. The maximum sorption amount of Cu2+ on MPAL was approximately 30 mg/g, which was 10 times more than pristine palygorskite. Freundlich isotherm describes the sorption data better than other isotherms, and pseudo second order kinetic model fit the sorption kinetic processes well. The positive enthalpy change confirmed that the sorption process of MPAL was endothermic and the positive entropy changes revealed that sorption of Cu2+ was driven by entropy changes. Further characterization analyses and the “Hard and Soft Acids and Bases theory” for mechenism research exhibited the complexation existence of Cu2+ with mercapto groups. The good performance demonstrated that MPAL has great potential application values in removal of heavy metals both from aqueous and soils.
Keywords:Palygorskite;Mercapto functionalization;Sorption;Copper;Soil remediation
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