Carboxymethyl cellulose/polyacrylamide composite hydrogel for cascaded treatment/reuse of heavy metal ions in wastewater

被引：389
作者：
Godiya, Chirag B. [1 ]
Cheng, Xiao [1 ]
Li, Dawei [2 ]
Chen, Zhan [3 ]
Lu, Xiaolin [1 ]
机构：
[1] Southeast Univ, Sch Biol Sci & Med Engn, State Key Lab Bioelect, Nanjing 210096, Jiangsu, Peoples R China
[2] Nanjing Univ, Sch Environm, State Key Lab Pollut Control & Resource Reuse, Nanjing 210023, Jiangsu, Peoples R China
[3] Univ Michigan, Dept Chem, 930 North Univ Ave, Ann Arbor, MI 48109 USA
来源：
JOURNAL OF HAZARDOUS MATERIALS | 2019年 / 364卷
基金：
中国国家自然科学基金;
关键词：
Porous hydrogel; Heavy metal ions; Adsorption; Kinetic model; Catalysis; AQUEOUS-SOLUTION; CATALYTIC-REDUCTION; SELECTIVE REMOVAL; CELLULOSE; ADSORPTION; OXIDE; LEAD; POLYACRYLAMIDE; NANOPARTICLES; COPPER;
D O I：
10.1016/j.jhazmat.2018.09.076
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
A new bio-based bilateral hydrogel containing carboxymethyl cellulose (CMC) and polyacrylamide (PAM) was prepared for the wastewater remediation. The obtained CMC/PAM composite hydrogel reveals a strong single-ion affinity for copper (Cut(II)), lead (Pb-II) and cadmium (Cd-II) ions, as well as multi-ion absorbability with its equilibrium data following the Langmuir adsorption model and its adsorption process abiding by a pseudo-second-order kinetics. To demonstrate its recycled use for the metal ions, the adsorbed Cull ions in the hydrogel were reduced in situ to form homogeneously dispersed Cu nanoparticles (NPs), leading to the Cu NPs-loaded CMC/PAM hydrogel. Reduction of 4-nitrophenol to 4-aminophenol with high efficiency was successfully achieved by this Cu NPs-loaded CMC/PAM hydrogel, verifying the hydrogel's dual functionalities towards the wastewater treatment and catalytic application.
引用
收藏
页码：28 / 38
页数：11
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