Cellulose-based thermosensitive supramolecular hydrogel for phenol removal from polluted water

吸附 纤维素 超分子化学 化学工程 自愈水凝胶 化学 苯酚 朗缪尔吸附模型 聚合 高分子化学 材料科学 有机化学 聚合物 分子 工程类
作者
Ming Guo,Jue Wang,Cheng Zhang,Xinyu Zhang,Changlei Xia,Hongfei Lin,Chin Yik Lin,Su Shiung Lam
出处
期刊:Environmental Research [Elsevier BV]
卷期号:214: 113863-113863 被引量:12
标识
DOI:10.1016/j.envres.2022.113863
摘要

Pollution of phenolic effluent from spice and plastics factories has become increasingly serious. Thus, developing a green and highly efficient adsorbent to remove phenolic compounds from wastewater is of urgent need. In this study, cellulose graft copolymer was synthesized through grafting 4-vinylpyridine monomer and polyethylene glycol methacrylate to a molecular skeleton of cellulose by free radical polymerization. The supramolecular hydrogel was successfully synthesized by physical cross-linking of cellulose graft copolymer and α-cyclodextrin. These supramolecular hydrogels were thoroughly characterized and the adsorption performance (adsorption isotherms and adsorption kinetics) of phenol on the supramolecular hydrogel were investigated in batch operation. The supramolecular hydrogel not only exhibited excellent adsorption of phenol, but also demonstrated increased mechanical strength due to the introduction of a modified cellulose base material. The adsorption kinetics of phenol on the supramolecular hydrogel followed a quasi-second-order reaction, with a correlation coefficient of 0.9909. The adsorption isotherm conformed to the Langmuir adsorption isotherm, and the maximum adsorption capacity of phenol can reach 80.71 mg g-1, which was 2-3 times higher than traditional carbon-based materials. The results demonstrate the great promise of the waste-derived supramolecular hydrogel to be used as an efficient adsorbent in wastewater treatment.
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