Hydroxyl-functionalized ionic liquid-based cross-linked polymer as highly efficient adsorbent for anionic azo dyes removal
Hydroxyl-functionalized ionic liquid-based cross-linked polymer as highly efficient adsorbent for anionic azo dyes removal
复制标题
羟基功能化离子液体基交联聚合物作为阴离子偶氮染料去除的高效吸附剂
DOI：
10.1016/j.cej.2013.08.078
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发表时间：
2013-12-01
影响因子：
15.1
通讯作者：
Zheng, Liqiang
中科院分区：
文献类型：
--
作者：
Gao, Hejun;Wang, Yun;Zheng, Liqiang
以1-羟乙基-3-乙烯基咪唑鎓氯化物和二乙烯基苯为原料合成了羟基功能化离子液体交联聚合物。采用扫描电镜、热重分析和傅里叶变换红外光谱等手段对吸附剂的物化性质进行了研究。采用间歇吸附法研究了该交联聚合物对阴离子偶氮染料的吸附性能，并进一步研究了吸附过程的动力学和热力学。吸附动力学符合准二级动力学模型，吸附等温线符合Langmuir模型。室温（25 ℃）下5 h后，FCF对橙子II和日落黄的最大吸附量分别达到2095.80和2100.98 mg/g。吸附容量比以前报道的大多数吸附剂好得多。在交联聚合物中引入羟基功能化的离子液体基团，构成了一种新型高效的吸附剂。(C)2013爱思唯尔有限公司版权所有。
Hydroxyl-functionalized ionic liquid-based cross-linked polymer is synthesized from 1-hydroxyethyl-3-vinylimidazolium chloride and divinylbenzene. The physicochemical properties of the adsorbent are investigated by scanning electron microscopy, thermogravimetric analysis, and Fourier transform infrared spectroscopy. The adsorption capacity of the novel cross-linked polymer with respect to anionic azo dyes is investigated using a batch adsorption procedure and the kinetics and thermodynamics of the adsorption process are further investigated. It is found that the adsorption kinetics is well fitted by a pseudo-second-order model and the adsorption isotherms agree well with the Langmuir model. The maximum adsorption capacity after 5 h at room temperature (25 degrees C) could reach 2095.80 and 2100.98 mg/g for orange II and sunset yellow FCF, respectively. The adsorption capacity is much better than most of the previously reported adsorbents. The introduction of hydroxyl-functionalized task-specific ionic liquid moieties into cross-linked polymer constitutes a new and efficient kind of adsorbent. (C) 2013 Elsevier B.V. All rights reserved.