期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 144, 期 -, 页码 671-681出版社
ELSEVIER
DOI: 10.1016/j.ijbiomac.2019.12.139
关键词
Sodium alginate; Polyethyleneimine; Porous hydrogel; Adsorption; Methyl blue removal
资金
- National Natural Science Foundation of China [21574020]
- Key Research and Development Projects of Liaoning Province, China [2017308004]
- Research and Development Projects of Dalian University of Technology Panjin Industrial Technology Institute [2019A015]
Herein, a potential hydrogel based on sodium alginate (SA) integrated with polyethyleneimine (PEI) was fabricated and employed for the elimination of methyl blue (MB) in aqueous media. The SA/PEI hydrogel demonstrated excellent removal performance for MB, i.e. similar to 99% of MB could be removed from water within similar to 30 min using 0.5 g/L SA/PEI hydrogel at 100 mg/L initial concentration. The SA/PEI hydrogel presented maximum adsorption capacity for MB as-high as 400.0 mg/g with the adsorption isotherm and kinetics abide with the Langmuir isotherm model and pseudo second-order kinetics, respectively. The adsorption process followed through chelation between the functionality of the hydrogel and MB as-confirmed by the X-ray photoelectron spectroscopy (XPS) analysis. After four consecutive adsorption/desorption cycles, the adsorption capacity of the SA/PEI hydrogel remained up to similar to 60% of its adsorption capacity in first cycle. Thus, being a cost-effective and eco-friendly material, the SA/PEI hydrogel can be a potential adsorbent in the decontamination of MB in wastewater. (C) 2019 Elsevier B.V. All rights reserved.
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