Preparation of Chitosan-g-Poly (Vinylimidazole-co-2-Acrylamido-2-Methyl Propane Sulfonic Acid) Granular Hydrogel for Selective Adsorption of Hg2+
Preparation of Chitosan-g-Poly (Vinylimidazole-co-2-Acrylamido-2-Methyl Propane Sulfonic Acid) Granular Hydrogel for Selective Adsorption of Hg2+
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壳聚糖-g-聚(乙烯基咪唑-co-2-丙烯酰胺基-2-甲基丙磺酸)选择性吸附Hg2颗粒水凝胶的制备
DOI：
10.1007/s11270-016-2812-4
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发表时间：
2016-03
影响因子：
2.9
通讯作者：
Zheng Y
中科院分区：
文献类型：
--
作者：
Wang Feng;Zheng Yian;Zhu Yongfeng;Wang Aiqin;Zheng Y
以壳聚糖为接枝骨架，以乙烯基咪唑和2-丙烯酰胺-2-甲基丙烷磺酸为单体，采用一步自由基聚合法制备了壳聚糖-g-聚（乙烯基咪唑-co-2-丙烯酰胺-2-甲基丙烷磺酸）颗粒状水凝胶。所制备的水凝胶可以作为吸附剂，有效、选择性地去除水溶液中的Hg2+离子。对Hg2+的最大吸附量为363.55 mg/g，拟二级动力学模型和Langmuir等温模型可以很好地描述吸附结果。此外，制备的颗粒水凝胶在多次重复吸附-解吸过程中对Hg2+的吸附表现出良好的循环稳定性。结果表明，所制备的颗粒水凝胶具有去除和回收废水中Hg2+的潜在应用价值。通过自由基聚合，将VIM和AMPS接枝聚合在CTS骨架上，成功合成了一种对Hg2+离子具有良好选择性吸附的颗粒状水凝胶
A granular hydrogel of chitosan-g-poly(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.Graphical AbstractA kind of granular hydrogel with excellent selectivity adsorption of Hg2+ ions was successfully synthesized by grafting polymerization of VIM and AMPS onto the CTS backbone via a facile free radical polymerization
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