EDTA-functionalized magnetic chitosan oligosaccharide and carboxymethyl cellulose nanocomposite: Synthesis, characterization, and Pb(II) adsorption performance

被引：55
作者：
Lian, Zhenwei [1 ]
Li, Yanfeng [1 ]
Xian, Hongyi [1 ]
Ouyang, Xiao-kun [1 ,2 ]
Lu, Yuqing [2 ]
Peng, Xiaowu [3 ]
Hu, Dalin [1 ]
机构：
[1] Southern Med Univ, Sch Publ Hlth, Dept Environm Hlth, Guangdong Prov Key Lab Trop Dis Res, Guangzhou 510515, Peoples R China
[2] Zhejiang Ocean Univ, Sch Food & Pharm, Zhoushan 316022, Peoples R China
[3] Minist Ecol & Environm, State Environm Protect Key Lab Environm Pollut Hl, South China Inst Environm Sci, Guangzhou 510535, Peoples R China
来源：
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES | 2020年 / 165卷
基金：
中国国家自然科学基金;
关键词：
Carboxymethyl cellulose; Adsorption; Chitosan oligosaccharide; HIGHLY SELECTIVE ADSORPTION; AQUEOUS-SOLUTION; EFFICIENT ADSORPTION; HEAVY-METALS; LEAD IONS; REMOVAL; OXIDE; CU(II); WATER; NANOPARTICLES;
D O I：
10.1016/j.ijbiomac.2020.09.156
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
A novel ethylenediaminetetraacetic acid (EDTA)-functionalized magnetic chitosan oligosaccharide and carboxymethyl cellulose (Fe3O4@CMCCOS-EDTA) nanocomposite adsorbent was successfully fabricated for Pb (II) adsorption. The adsorbent was characterized by Fourier transform infrared, and X-ray photoelectron spectroscopy was used to confirm successful EDTA modification and Pb(II) adsorption. Scanning electron microscopy, transmission electron microscopy, vibrating sample magnetometer, and thermogravimetric analysis were used to study the morphology and properties of magnetic particles. EDTA modification considerably improved the capacity of the adsorbent. The batch adsorption experiment results indicated that the pseudo-second-order (PSO) model and the Langmuir isotherm model reliably described the adsorption behavior. The maximum adsorption capacity (q(m)) for monolayer chemical adsorption was calculated to be 432.34 mg/g at the pH of 5 and temperature of 308 K. Notably, Fe3O4@CMCCOS-EDTA exhibited a high Pb(II) removal rate of similar to 100% using an initial metal ion solution of 100 mg/L and 200 mg/L. (C) 2020 Elsevier B.V. All rights reserved.
引用
收藏
页码：591 / 600
页数：10
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