Control for selective sorption of heavy metals cations with anion exchanger AB-17-8 by modifying the surface with citrate groups
Murzakasymova N.S. Bektenov N.A. Serebriakov K.V. Yelkin E.S. Gavrilenko M.A.
1 September 2024Elsevier Ltd
Mendeleev Communications
2024#34Issue 5755 - 757 pp.
The citric acid modification produces an intermediate layer on the AB-17-8:C6H8O7 surface; the layer, on one hand, is firmly secured to the surface owing to the electrostatic coupling between the citrate anion and the positively charged trimethylammonium centers of the anion exchanger surface; on the other hand, it has carbonyl groups with a local negative electron density. The sorption of heavy metals cations occurs through coordination interactions via electrostatic mechanism with local centers of negative electron density, in particular, with the carbonylic oxygen atom.
acid–base centers , adsorption , anion exchanger , citric acid , modified surfaces
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Department of Chemistry and Chemical Technology, Faculty of Technology, M. Kh. Dulaty Taraz Regional University, Taraz, 080000, Kazakhstan
Abay Kazakh National Pedagogical University, Almaty, 050000, Kazakhstan
Tomsk Polytechnic University, Tomsk, 634050, Russian Federation
Department of Chemistry and Chemical Technology
Abay Kazakh National Pedagogical University
Tomsk Polytechnic University
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