Performance of carboxymethyl cellulose and alginate nanocomposite hydrogel containing graphene oxide nanosheets for removal of methylene blue dye

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Peighambardoust S.J.; Mostafaei A.; Mohammadzadeh Pakdel P.; Mohammadpourfard M.

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ISSN: 2588-4824

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Journal: Journal of Applied Research in Chemistry Year:2024 | Volume: | Issue: Page(s): 35-51

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Title

Performance of carboxymethyl cellulose and alginate nanocomposite hydrogel containing graphene oxide nanosheets for removal of methylene blue dye

Author(s)

Peighambardoust S.J. | Mostafaei A. | Mohammadzadeh Pakdel P. | Mohammadpourfard M. | Issue Writer Certificate

Keywords

Nanocomposite hydrogelQ4

Methylene blueQ4

AbsorbentQ4

Graphene oxideQ4

Wastewater treatment.Q4

Abstract

Today, with the development of industries and urbanization, the need for healthy water have increased. Hydrogels are effective adsorbents for removing pollutants from water sources. In this research, Graphene oxide (GO) nanosheets were used to improve the performance of Methylene blue dye removal by carboxymethyl cellulose hydrogel and alginate, which were biocompatible. Carboxymethyl cellulose and alginate Nanocomposite hydrogels containing Graphene oxide nanosheets showed good performance compared to hydrogels synthesized by chemical method. The synthesized adsorbents were characterized by thermal gravimetric analysis (TGA) and scanning electron microscopy (SEM). Different weight percentages of GO (0-10 wt. %) were incorporated in the hydrogel matrix and obtained optimal value was 6 wt. %. The obtained removal efficiency was 65.4 and 73.1 % for CMC/Alg and CMC/Alg/GO, respectively, under optimal conditions (initial concentration of 56 mg/l, adsorbent dose of 1.5 g/l, 120 min contact time, and 25 °C temperature). Analysis of kinetic data showed that the pseudo-second-order model had R2 order of 0.986 and 0.983 for CMC/Alg and CMC/Alg/GO adsorbents, respectively. Therefore, it was the most suitable model for kinetic data fitting. Monolayer adsorption capacity for CMC/Alg and CMC/Alg/GO adsorbents was 91.74 and 96.15 mg/g, respectively, which showed the improvement of the adsorption by incorporation of GO. Thermodynamic investigation showed that the adsorption process is spontaneous and endothermic. Finally, it can be concluded that the synthesized Nanocomposite hydrogel can be used as an effective adsorbent for the decontamination of Methylene blue dye.

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