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Cysteine-montmorillonite composites for heavy metal cation complexation: A combined experimental and theoretical study

•Cysteine-montmorillonite composites increase the heavy metal retention.•The key parameters that control the chelation are determined.•The cations coordination is understood via experimental and theoretical approaches. Green composites based on montmorillonite (Mt) and cysteine, were prepared for he... Full description

Journal Title: Chemical Engineering Journal 15 April 2017, Vol.314, pp.406-417
Main Author: El Adraa, Khaled
Other Authors: Georgelin, Thomas , Lambert, Jean-François , Jaber, Farouk , Tielens, Frederik , Jaber, Maguy
Format: Electronic Article Electronic Article
Language: English
Subjects:
Dft
NMR
ID: ISSN: 1385-8947 ; DOI: 10.1016/j.cej.2016.11.160
Link: http://dx.doi.org/10.1016/j.cej.2016.11.160
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recordid: sciversesciencedirect_elsevierS1385-8947(16)31748-X
title: Cysteine-montmorillonite composites for heavy metal cation complexation: A combined experimental and theoretical study
format: Article
creator:
  • El Adraa, Khaled
  • Georgelin, Thomas
  • Lambert, Jean-François
  • Jaber, Farouk
  • Tielens, Frederik
  • Jaber, Maguy
subjects:
  • Montmorillonite
  • Heavy Metal Cations
  • Cysteine
  • Dft
  • NMR
ispartof: Chemical Engineering Journal, 15 April 2017, Vol.314, pp.406-417
description: •Cysteine-montmorillonite composites increase the heavy metal retention.•The key parameters that control the chelation are determined.•The cations coordination is understood via experimental and theoretical approaches. Green composites based on montmorillonite (Mt) and cysteine, were prepared for heavy metal removal. A comparison between the adsorption properties of the resulting hybrid inorganic-organic materials and the pure montmorillonite was carried out for the following heavy metal cations Cd2+, Hg2+, Pb2+, Co2+ and Zn2+. It appears that the adsorption capacity is higher on the composite. Moreover, in release experiments, the heavy metal cations are more strongly retained by the hybrid material. Interactions between the hybrid clay mineral and the inorganic hosts were studied by spectroscopic methods such as solid-state NMR (Nuclear Magnetic Resonance) and FTIR (Fourier Transform Infrared). The experimental data were in agreement with the theoretical periodic DFT (Density Functional Theory) calculations where a molecular picture of the adsorption complex is proposed.
language: eng
source:
identifier: ISSN: 1385-8947 ; DOI: 10.1016/j.cej.2016.11.160
fulltext: no_fulltext
issn:
  • 13858947
  • 1385-8947
url: Link


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titleCysteine-montmorillonite composites for heavy metal cation complexation: A combined experimental and theoretical study
creatorEl Adraa, Khaled ; Georgelin, Thomas ; Lambert, Jean-François ; Jaber, Farouk ; Tielens, Frederik ; Jaber, Maguy
ispartofChemical Engineering Journal, 15 April 2017, Vol.314, pp.406-417
identifierISSN: 1385-8947 ; DOI: 10.1016/j.cej.2016.11.160
subjectMontmorillonite ; Heavy Metal Cations ; Cysteine ; Dft ; NMR
description•Cysteine-montmorillonite composites increase the heavy metal retention.•The key parameters that control the chelation are determined.•The cations coordination is understood via experimental and theoretical approaches. Green composites based on montmorillonite (Mt) and cysteine, were prepared for heavy metal removal. A comparison between the adsorption properties of the resulting hybrid inorganic-organic materials and the pure montmorillonite was carried out for the following heavy metal cations Cd2+, Hg2+, Pb2+, Co2+ and Zn2+. It appears that the adsorption capacity is higher on the composite. Moreover, in release experiments, the heavy metal cations are more strongly retained by the hybrid material. Interactions between the hybrid clay mineral and the inorganic hosts were studied by spectroscopic methods such as solid-state NMR (Nuclear Magnetic Resonance) and FTIR (Fourier Transform Infrared). The experimental data were in agreement with the theoretical periodic DFT (Density Functional Theory) calculations where a molecular picture of the adsorption complex is proposed.
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abstract•Cysteine-montmorillonite composites increase the heavy metal retention.•The key parameters that control the chelation are determined.•The cations coordination is understood via experimental and theoretical approaches. Green composites based on montmorillonite (Mt) and cysteine, were prepared for heavy metal removal. A comparison between the adsorption properties of the resulting hybrid inorganic-organic materials and the pure montmorillonite was carried out for the following heavy metal cations Cd2+, Hg2+, Pb2+, Co2+ and Zn2+. It appears that the adsorption capacity is higher on the composite. Moreover, in release experiments, the heavy metal cations are more strongly retained by the hybrid material. Interactions between the hybrid clay mineral and the inorganic hosts were studied by spectroscopic methods such as solid-state NMR (Nuclear Magnetic Resonance) and FTIR (Fourier Transform Infrared). The experimental data were in agreement with the theoretical periodic DFT (Density Functional Theory) calculations where a molecular picture of the adsorption complex is proposed.
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