Removal of anionic azo dyes from aqueous solution by functional ionic liquid cross-linked polymer
Removal of anionic azo dyes from aqueous solution by functional ionic liquid cross-linked polymer
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功能性离子液体交联聚合物去除水溶液中阴离子偶氮染料
DOI：
10.1016/j.jhazmat.2013.07.001
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发表时间：
2013-10-15
影响因子：
13.6
通讯作者：
Zheng, Ligiang
中科院分区：
文献类型：
--
作者：
Gao, Hejun;Kan, Taotao;Zheng, Ligiang
以1-氨乙基-3-乙烯基咪唑氯化物和二乙烯基苯为原料合成了一种新型功能化离子液体交联聚合物（PDVB-IL）。采用傅里叶变换红外光谱、扫描电镜和热重分析等方法对PDVB-IL的理化性质进行了研究。以阴离子偶氮染料橙子II、日落黄和阿马兰斯红为吸附剂，研究了其对染料的吸附性能。在25 ℃时，FCF对橙子11、日落黄和阿马兰斯红的最大吸附量分别达到925.09、734.62和547.17 mg/g，比以往报道的大多数吸附剂都要好。在1-8的范围内研究了pH值的影响。结果表明，较低的pH值有利于阴离子偶氮染料的吸附。吸附动力学和吸附等温线分别符合准二级动力学模型和Langmuir模型。吸附过程中被发现占主导地位的物理吸附。在交联聚二乙烯基苯聚合物中引入功能性离子液体基团，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。
A novel functional ionic liquid based cross-linked polymer (PDVB-IL) was synthesized from 1-aminoethyl-3-vinylimidazolium chloride and divinylbenzene for use as an adsorbent. The physicochemical properties of PDVB-IL were investigated by Fourier transform infrared spectroscopy, scanning electron microscopy and thermogravimetric analysis. The adsorptive capacity was investigated using anionic azo dyes of orange II, sunset yellow FCF, and amaranth as adsorbates. The maximum adsorption capacity could reach 925.09, 734.62, and 547.17 mg/g for orange 11, sunset yellow FCF and amaranth at 25 degrees C, respectively, which are much better than most of the other adsorbents reported earlier. The effect of pH value was investigated in the range of 1-8. The result shows that a low pH value is found to favor the adsorption of those anionic azo dyes. The adsorption kinetics and isotherms are well fitted by a pseudo second-order model and Langmuir model, respectively. The adsorption process is found to be dominated by physisorption. The introduction of functional ionic liquid moieties into cross-linked poly(divinylbenzene) polymer constitutes a new and efficient kind of adsorbent. (C) 2013 Elsevier B.V. All rights reserved.