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Wang D, Wang R, Peng W, Zhang J, Wang Y, Huang M, Zhang N, Duan Y, Fang Y. Experimental and DFT study of Cu(II) removed by Na-montmorillonite. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2023; 87:834-851. [PMID: 36853765 DOI: 10.2166/wst.2023.045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
The experimental and theoretical studies on the adsorption of Cu(II) on the surface of Na-montmorillonite (Na-Mt) were reported. Effects of batch adsorption experimental parameters were studied. Density functional theory and molecular dynamics simulations were used to study the adsorption of Cu(II) on montmorillonite (001) surface. The adsorption reached equilibrium within 80 min and the adsorption capacity was 35.23 mg·g-1 at 25 °C. The adsorption data of Cu(II) were consistent with pseudo-second-order kinetics and Langmuir isotherm models. The adsorption process was dominated by physical adsorption (Ea was 37.08 kJ·mol-1) with spontaneous endothermic behavior. The influence of coexisting cations on the adsorption capacity of Cu(II) was Mg(II) > Co(II) > Ca(II) > Na(I). The simulation results demonstrated that there were no significant differences in the adsorption energy of Cu(II) at the four adsorption sites on the montmorillonite (001) surface. Cu(II) had more electron transfer than Na(I). The diffusion coefficient of Cu(II) in the aqueous solution system containing montmorillonite was 0.85×10-10 m2·s-1. Considerable amounts of Cu(II) ions were adsorbed at a distance of 0.26 and 2.25 Å from the montmorillonite (001) surface. The simulation results provided strong supporting evidence for experimental conclusions.
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Affiliation(s)
- Danqi Wang
- School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, Xinjiang 832003, China E-mail:
| | - Ruicong Wang
- School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, Xinjiang 832003, China E-mail:
| | - Wencai Peng
- School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, Xinjiang 832003, China E-mail: ; Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi, Xinjiang, China
| | - Jinli Zhang
- School of Chemical Engineering, Tianjin University, Tianjin 300350, China
| | - Yi Wang
- School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, Xinjiang 832003, China E-mail:
| | - Minghui Huang
- School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, Xinjiang 832003, China E-mail:
| | - Na Zhang
- School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, Xinjiang 832003, China E-mail:
| | - Yanan Duan
- School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, Xinjiang 832003, China E-mail:
| | - Ying Fang
- School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, Xinjiang 832003, China E-mail:
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Yousefzadeh H, Bozbag SE, Sushkevich V, van Bokhoven JA, Erkey C. Stepwise conversion of methane to methanol over Cu-mordenite prepared by supercritical and aqueous ion exchange routes and quantification of active Cu species by H2-TPR. CATAL COMMUN 2022. [DOI: 10.1016/j.catcom.2022.106574] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
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