刚果红
阳离子聚合
吸附
木质素
自愈水凝胶
化学
肿胀 的
丙烯酰胺
化学工程
丙烯酸酯
核化学
高分子化学
材料科学
有机化学
聚合物
共聚物
工程类
作者
Chao Wang,Xuezhen Feng,Wanbing Li,Shibin Shang,Haibo Zhang
出处
期刊:Journal of Renewable Materials
[Computers, Materials and Continua (Tech Science Press)]
日期:2023-01-01
卷期号:11 (4): 1793-1805
被引量:1
标识
DOI:10.32604/jrm.2023.024521
摘要
Due to the low content of adsorption-active groups in lignin, its application in the field of adsorption is limited. Herein, we first prepared cationic kraft lignin acrylate, from which a cationic lignin (CKLA) hydrogel was further prepared by cationic kraft lignin acrylate, acrylamide, and N, N’-methylenebisacrylamide. The morphology, compression properties and swelling properties of CKLA hydrogels were investigated. The prepared CKLA hydrogel was applied as an adsorbent for Congo red. The effect of CKLA hydrogel dosages, initial concentration of Congo red, and pH on adsorption efficiency was investigated. The maximum Congo red removal efficiency was obtained at the initial concentration of Congo red of 50 mg/L, pH 7, and 5 mg dosage of CKLA hydrogel with 20% cationic lignin content. After five cycles of adsorption, the adsorption efficiency of the hydrogel for Congo red still reached more than 80%. The CKLA hydrogel showed pseudo-second-order adsorption kinetics for Congo red adsorption. These results demonstrate the potential of the CKLA hydrogel as an adsorbent for water treatment.
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