Facile preparation of polyacrylamide/chitosan/Fe3O4 composite hydrogels for effective removal of methylene blue from aqueous solution

Cheng Zhang; Yankai Dai; Yinqiu Wu; Guangwei Lu; Zheng Cao; Junfeng Cheng; Kailun Wang; Haicun Yang; Yanping Xia; Xiaoqian Wen; Wenzhong Ma; Chunlin Liu; Zhaoli Wang

doi:10.1016/j.carbpol.2020.115882

Facile preparation of polyacrylamide/chitosan/Fe₃O₄ composite hydrogels for effective removal of methylene blue from aqueous solution

Carbohydr Polym. 2020 Apr 15:234:115882. doi: 10.1016/j.carbpol.2020.115882. Epub 2020 Jan 17.

Authors

Affiliations

¹ Jiangsu Key Laboratory of Environmentally Friendly Polymeric Materials, School of Materials Science and Engineering, Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Changzhou University, Changzhou, 213164, Jiangsu, China.
² Jiangsu Key Laboratory of Environmentally Friendly Polymeric Materials, School of Materials Science and Engineering, Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Changzhou University, Changzhou, 213164, Jiangsu, China; Changzhou University Huaide College, Changzhou, 213016, China; The State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai, 200433, China. Electronic address: zcao@cczu.edu.cn.
³ Jiangsu Key Laboratory of Environmentally Friendly Polymeric Materials, School of Materials Science and Engineering, Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Changzhou University, Changzhou, 213164, Jiangsu, China; Changzhou University Huaide College, Changzhou, 213016, China. Electronic address: 282177786@qq.com.
⁴ Jiangsu Key Laboratory of Environmentally Friendly Polymeric Materials, School of Materials Science and Engineering, Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Changzhou University, Changzhou, 213164, Jiangsu, China; Ecology and Resources Engineering College, Wuyi University, Wuyishan, 354300, China. Electronic address: 1971888371@qq.com.

PMID: 32070505
DOI: 10.1016/j.carbpol.2020.115882

Abstract

In this study, Fe₃O₄ magnetic nanoparticles were synthesized in situ in the polyacrylamide/chitosan (PAAm/CS) hydrogel networks. The obtained hydrogels are characterized by Scanning electron microscopy (SEM), Transmission electron microscopy (TEM), X-ray diffraction (XRD), and Raman spectroscopy. The results confirm that the three-dimensional network structure of the hydrogels is incorporated with Fe₃O₄ nanoparticles. The adsorption properties of PAAm/CS/Fe₃O₄ hydrogels for methylene blue (MB) in aqueous solution were studied using Ultraviolet and visible spectrophotometry (UV-vis). The results show that when compared to PAAm/CS hydrogels, PAAm/CS/Fe₃O₄ hydrogels can adsorb MB with higher adsorption capacities of approximately 1603 mg/g, and the kinetics and isotherm models of the adsorption process could be better described by the pseudo-first order model and Langmuir isotherm model, respectively. Due to the facile preparation, high adsorption capacity, and low cost, the PAAm/CS/Fe₃O₄ hydrogels are good adsorbents for MB and exhibit significant potential in the treatment of sewage.

Keywords: Adsorption; Chitosan; Fe(3)O(4) nanoparticles; Hydrogels; Methylene blue.