TEMPO-oxidized cellulose hydrogel for efficient adsorption of Cu2+ and Pb2+ modified by polyethyleneimine

被引：38
|
作者：
Xing, Xinyi [1 ]
Li, Wenqi [1 ]
Zhang, Jie [1 ]
Wu, Han [1 ]
Guan, Ying [1 ]
Gao, Hui [1 ]
机构：
[1] Anhui Agr Univ, Sch Forestry & Landscape Architecture, Hefei 230036, Peoples R China
来源：
CELLULOSE | 2021年 / 28卷 / 12期
基金：
中国国家自然科学基金;
关键词：
Poplar cellulose; Hydrogel; Heavy metal ions; Polyethylenimine modification; SINGLE METAL SOLUTIONS; CARBOXYMETHYL CELLULOSE; HIGHLY EFFICIENT; WASTE-WATER; REMOVAL; ADSORBENT; PB(II); CU(II); IONS; CR(VI);
D O I：
10.1007/s10570-021-04052-w
中图分类号：
TB3 [工程材料学]; TS [轻工业、手工业、生活服务业];
学科分类号：
0805 ; 080502 ; 0822 ;
摘要：
In this study, the hydrogel was prepared by dissolving and regenerating poplar cellulose in NaOH/urea/water system. The TEMPO-oxidized cellulose hydrogels (TCH) were prepared using microwave-assisted accelerated TEMPO-oxidation system. Polyethyleneimine (PEI) was grafted onto TCH with glutaraldehyde as a cross-linking agent and the products named as TCP. The hydrogels were characterized by SEM, FTIR, XPS, and elemental analyzer. The maximum adsorption capacities of Cu2+ and Pb2+ by TCP were 109.89 mg/g and 279.32 mg/g, respectively. TCP was a single molecule adsorption process with better fitting of the Langmuir model. Adsorption kinetics showed that the Pb2+ adsorption rate of TCP was higher than that for Cu2+. The Cu2+ affinity of TCP was higher than the Pb2+. The adsorption capacity of TCP for Cu2+ and Pb2+ was 58.26 mg/g and 91.96 mg/g, respectively, after five cycles. This study provided a promising option of preparing an efficient and recyclable adsorbent in treating wastewater containing heavy metal, such as Cu2+ and Pb2+.
引用
收藏
页码：7953 / 7968
页数：16
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