Amine functionalized sodium alginate hydrogel for efficient and rapid removal of methyl blue in water
作者：Chirag B.Godiy, Yonghou Xiao, Xiaolin Lu
关键字：Sodium alginate; Polyethyleneimine; Porous hydrogel; Adsorption; Methyl blue removal
论文来源：期刊
具体来源：International Journal of Biological Macromolecules 2020, 144, 671–681
发表时间：2020年
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. ~99% of MB could be removed from water within ~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 ~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.
https://www.sciencedirect.com/science/article/pii/S0141813019384922#!