Preparation of quaternary ammonium magnetic chitosan microspheres and their application for Congo red adsorption.

Autor: Huang LY; College of Light Industry and Food Engineering, Guangxi University, Nanning 530004, China., Li W; Guangxi Key Laboratory of Chemistry and Engineering of Forest Products, School of Chemistry and Chemical Engineering, Guangxi University for Nationalities, Nanning 530008, China., Du N; College of Light Industry and Food Engineering, Guangxi University, Nanning 530004, China., Lu HQ; College of Light Industry and Food Engineering, Guangxi University, Nanning 530004, China., Meng LD; College of Light Industry and Food Engineering, Guangxi University, Nanning 530004, China., Huang KY; College of Light Industry and Food Engineering, Guangxi University, Nanning 530004, China., Li K; College of Light Industry and Food Engineering, Guangxi University, Nanning 530004, China; Collaborative Innovation Center of Guangxi Sugarcane Industry, Guangxi University, Nanning 530004, China; Engineering Research Center for Sugar Industry and Comprehensive Utilization, Ministry of Education, Nanning 530004, China. Electronic address: gxlikai@gxu.edu.cn.
Jazyk: angličtina
Zdroj: Carbohydrate polymers [Carbohydr Polym] 2022 Dec 01; Vol. 297, pp. 119995. Date of Electronic Publication: 2022 Aug 17.
DOI: 10.1016/j.carbpol.2022.119995
Abstrakt: In this study, novel green in situ quaternary-ammonium-functionalized magnetic chitosan microspheres (IQMCM) were synthesised. The resulting adsorbent was characterised by Fourier transform infrared spectroscopy, X-ray diffraction, thermogravimetric analysis, vibrating sample magnetometry, X-ray photoelectron spectroscopy, and zeta potential analysis. The characterization results indicated that the IQMCMs possessed spherical morphology and superior specific thermal stability, magnetic properties, and surface charges. Batch adsorption experiments revealed that the adsorption capacities of the IQMCM microspheres to Congo red (CR) was 630.21 mg/g at a dosage of 0.15 g/L, temperature of 333 K, pH of 5.0, and initial dye concentration of 100 mg/L, and the corresponding removal rate reached 94.53 %. According to the kinetics, adsorption isotherms, and thermodynamics experiment results, the adsorption of CR dye coincided with a spontaneous endothermic monolayer chemisorption process. After saturated adsorption, this magnetic adsorbent could be rapidly separated from water and reused with little adsorption capacity loss. Overall, these results show that IQMCMs are potentially applicable in wastewater treatment.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2022. Published by Elsevier Ltd.)
Databáze: MEDLINE
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