Fabrication of magnetic macroporous chitosan-g-poly (acrylic acid) hydrogel for removal of Cd2+ and Pb2+

被引：45

作者：

Zhu, Yongfeng ^{[1
,2
]}

Zheng, Yian ^{[1
,3
]}

Wang, Feng ^{[1
,2
]}

Wang, Aiqin ^{[1
]}

机构：

[1] Chinese Acad Sci, Lanzhou Inst Chem Phys, Ctr Ecomat & Green Chem, Tianshui Middle Rd 18, Lanzhou 730000, Peoples R China

[2] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

[3] Lanzhou Univ, Coll Earth & Environm Sci, Gansu Key Lab Environm Pollut Predict & Control, Lanzhou 730000, Peoples R China

来源：

INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES | 2016年 / 93卷

基金：

中国国家自然科学基金;

关键词：

Adsorption; Macroporous hydrogel; Heavy metal; Pickering-HIPEs; Magnetic; PICKERING DOUBLE EMULSIONS; HEAVY-METAL IONS; GRAPHENE OXIDE; AQUEOUS-SOLUTIONS; POROUS MATERIALS; GREEN ADSORBENT; HIPES TEMPLATE; WASTE-WATER; DYE REMOVAL; COPPER IONS;

D O I：

10.1016/j.ijbiomac.2016.09.005

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 macroporous magnetic macroporous chitosan-g-poly (acrylic acid) hydrogel adsorbent was fabricated from the Pickering high internal emulsions template stabilized by modified Fe3O4 nanoparticles. The structure and composition of modified Fe3O4 and macroporous magnetic hydrogel were characterized by TEM, XRD, TG and SEM techniques. The characterization results suggest that the Fe3O4 nanoparticles have been modified successfully with organosilane of 3-aminopropyltrimethoxysilane (APTES), and the porous structure of the macroporous hydrogel can be tuned with the amount of stabilized particles, volume fraction of dispersed phase and the amount of the cosurfactant. Adsorption experiments indicate that the adsorption equilibrium was rapidly reached within 20 min and the maximal adsorption capacities were determined to be 308.84 mg/g for Cd2+ and 695.22 mg/g for Pb2+. After five adsorption-desorption cycles, the adsorbent can retain its high adsorption capacity. The introduction of Fe3O4 is beneficial to the recycle of adsorbent after usage. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：483 / 492

页数：10

共 61 条

[1] Potential of using green adsorbent of heavy metal removal from aqueous solutions: Adsorption kinetics, isotherm, thermodynamic, mechanism and economic analysis [J].