Preparation of Chitosan-g-Poly (Vinylimidazole-co-2-Acrylamido-2-Methyl Propane Sulfonic Acid) Granular Hydrogel for Selective Adsorption of Hg2+

被引：11
作者：
Wang, Feng [1 ,3 ]
Zheng, Yian [1 ,2 ]
Zhu, Yongfeng [1 ,3 ]
Wang, Aiqin [1 ]
机构：
[1] Chinese Acad Sci, Lanzhou Inst Chem Phys, Ctr Ecomat & Green Chem, Lanzhou 730000, Peoples R China
[2] Lanzhou Univ, Coll Earth & Environm Sci, Gansu Key Lab Environm Pollut Predict & Control, Lanzhou 730000, Peoples R China
[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
来源：
WATER AIR AND SOIL POLLUTION | 2016年 / 227卷 / 04期
基金：
中国国家自然科学基金;
关键词：
Granular hydrogel; Selective adsorption; Vinylimidazole; Hg2+; HEAVY-METAL IONS; WASTE-WATER; REMOVAL; MERCURY; EQUILIBRIUM; PB(II); NANOCOMPOSITE; MICROSPHERES; ADSORBENT; KINETICS;
D O I：
10.1007/s11270-016-2812-4
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
A granular hydrogel of chitosan-gpoly(vinylimidazole-co-2-acrylamido-2-methyl propane sulfonic acid) was successfully synthesized by one-step free radical polymerization based on the grafting backbone of chitosan and the monomers of vinylimidazole and 2-acrylamido-2-methyl propane sulfonic acid. The resulting hydrogel could be used as the adsorbent for the efficient and selective removal of Hg2+ ions from the aqueous solution. The adsorption results could be well described by the pseudo-second-order kinetic mode and the Langmuir isotherm model with a maximum adsorption capacity of 363.55 mg/g for Hg2+. Furthermore, the as-prepared granular hydrogel exhibited an excellent cycling stability for the adsorption of Hg2+ after multiple repeated adsorption-desorption process. It suggested that the obtained granular hydrogel has potential application for Hg2+ removal and recovery from wastewater.
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页数：12
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