北京林业大学学报2017，Vol.39Issue(12)：102-111,10.DOI:10.13332/j.1000-1522.20170309
糠醛渣木质素接枝聚丙烯酸水凝胶对Pb2+、Cu2+、Cd2+吸附性能研究
Adsorption properties of lignin-g-polyacrylic acid hydrogel on Pb2+, Cu2+, Cd2+
摘要
Abstract
A new lignin-g-polyacrylic acid hydrogel ( FRL-g-PAA hydrogel ) was made from furfural residue lignin and polyacrylic acid, and it can effectively remove Pb2+, Cu2+ and Cd2+ from water. The absorption behavior of prepared FRL-g-PAA hydrogel was characterized by various methods, including effects of pH value, temperature and K+ interfering ions on its equilibrium adsorption capacity. Adsorption kinetics, isotherm, thermodynamics and XPS spectra were used to analyze the adsorption mechanism of FRL-g-PAA. The results showed that grafting of FRL could help the composite hydrogel to enhance adsorption capacity of Pb2+, Cu2+ and Cd2+ ions. When adjusting pH value to 5, temperature reduction was beneficial for rapid and efficient adsorption on heavy metal ions. Under the interference of K+, the adsorption capability of FRL-g-PAA hydrogel was Pb2+ >Cu2+ >Cd2+. The adsorption process followed the pseudo-second-order model and the spontaneous exothermic reaction of Freundlich model. XPS spectra further indicated that Pb2+, Cu2+ and Cd2+ were adsorbed mainly by the hydroxyl group and carboxyl group of FRL-g-PAA hydrogel. The complexation between heavy metal ion and FRL-g-PAA hydrogel is synergistic effect of physical and chemical adsorptions.关键词
聚丙烯酸/糠醛渣木质素/重金属/吸附Key words
polyacrylic acid/lignin from furfural residue/heavy metal ion/adsorption分类
化学化工引用本文复制引用
孙亚杰,赵天琪,张春雷,付玉杰,李淑君,马艳丽..糠醛渣木质素接枝聚丙烯酸水凝胶对Pb2+、Cu2+、Cd2+吸附性能研究[J].北京林业大学学报,2017,39(12):102-111,10.基金项目
中央高校基本科研业务费专项(2572017CB14)、东北林业大学大学生国家级创新训练计划项目(201710225089)、国家重点研发计划课题(2016YFD0600806). （2572017CB14）
