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Graphene Oxide-Chitosan Composites for Water Treatment from Copper Cations

Institute of Civil Engineering, Peter the Great St. Petersburg Polytechnic University, 195251 Saint-Petersburg, Russia
Department of Chemistry and Chemical Technology of Materials, Yuri Gagarin State Technical University of Saratov, 410054 Saratov, Russia
Department of Ecology and Technosphere Safety, Yuri Gagarin State Technical University of Saratov, 410054 Saratov, Russia
Department of Biotechnology and Environmental Protection, Penza State Technological University, 440039 Penza, Russia
Department of Economics and Organization of Production, Kazan State Power Engineering University, 420066 Kazan, Russia
Basic Department of Trade Policy, Plekhanov Russian University of Economics, 117997 Moscow, Russia
Author to whom correspondence should be addressed.
Academic Editor: Yung-Tse Hung
Water 2022, 14(9), 1430;
Received: 9 February 2022 / Revised: 23 April 2022 / Accepted: 26 April 2022 / Published: 29 April 2022
(This article belongs to the Section Wastewater Treatment and Reuse)
This paper considers modern sorption materials for wastewater treatment. The literature data on wastewater treatment with materials based on graphene and chitosan are presented. The production and application of composite sorbents is discussed. It is shown that a promising application of graphene oxide (GO) as a filler enhances the mechanical and sorption properties of the polymer matrix. The biopolymer chitosan (Ch) is a challenging matrix for GO, having unique sorption, chelate-forming, ion-exchange, and complex-forming properties. Composite adsorbents based on graphene oxide and chitosan have a high extraction efficiency of heavy and radioactive metals, dyes, and pharmaceutical compounds dorzolamide and tetracycline. GO-Ch composites with various ratios of chitosan and graphene oxide (2–7%) were formed by drop granulation. The composites obtained were investigated in terms of the ability to extract copper cations from the effluents, and it was shown that the composite having the content of GO:Ch = 55.5:44.5% (by mass in dry granules) had the best sorption and mechanical properties. This sample had high purification efficiency from copper cations (96%) and the required mechanical properties (attrition ≤ 0.4%, grindability ≤ 4%). For this sample, the influence of various factors (pH, sorbent dosage, temperature, and time of sorption) on sorption processes were studied. The best conditions for the sorption processes by the GO-Ch sorbent were determined. The sorbent dosage was 20 g/L, the sorption time was 20 min, and the temperature was 20 ± 2 °C, pH = 7. The adsorption isotherm was plotted and the maximum sorption capacity of copper cations A = 58.5 mg/g was determined. Microstructural and infrared (IR) spectroscopy studies of GO-Ch composites showed the presence of a porous surface and OH- and C=O functional groups. A mechanism for the extraction of copper cations due to physical sorption of the porous surface by GO-Ch composites, and due to chemisorption processes by functional groups, was proposed. The sorption properties for methylene blue and iodine absorption, and the specific surface area of the GO-Ch samples, were determined. The spent sorbent is proposed to be used as a soil improver. View Full-Text
Keywords: graphene oxide; chitosan; adsorbents; water purification; heavy metal ions graphene oxide; chitosan; adsorbents; water purification; heavy metal ions
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MDPI and ACS Style

Politaeva, N.; Yakovlev, A.; Yakovleva, E.; Chelysheva, V.; Tarantseva, K.; Efremova, S.; Mukhametova, L.; Ilyashenko, S. Graphene Oxide-Chitosan Composites for Water Treatment from Copper Cations. Water 2022, 14, 1430.

AMA Style

Politaeva N, Yakovlev A, Yakovleva E, Chelysheva V, Tarantseva K, Efremova S, Mukhametova L, Ilyashenko S. Graphene Oxide-Chitosan Composites for Water Treatment from Copper Cations. Water. 2022; 14(9):1430.

Chicago/Turabian Style

Politaeva, Natalia, Andrei Yakovlev, Elena Yakovleva, Valentina Chelysheva, Klara Tarantseva, Sania Efremova, Liliya Mukhametova, and Svetlana Ilyashenko. 2022. "Graphene Oxide-Chitosan Composites for Water Treatment from Copper Cations" Water 14, no. 9: 1430.

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