2,4-Dichlorophenol sorption on cyclodextrin polymers
2,4-Dichlorophenol sorption on cyclodextrin polymers
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DOI：
10.1007/s10847-010-9751-2
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发表时间：
2010-02
影响因子：
2.3
通讯作者：
Ning Li;Z. Mei;Sheguang Ding
中科院分区：
文献类型：
--
作者：
Ning Li;Z. Mei;Sheguang Ding
研究了β-环糊精聚合物（β-CDP）和γ-环糊精聚合物（γ-CDP）对水溶液中2，4-二氯苯酚（2，4-DCP）的吸附性能。讨论了2，4-DCP初始浓度、吸附时间、pH值等吸附条件对吸附性能的影响。结果表明，吸附动力学符合Ho和McKay方程，膜扩散为速率控制步骤。吸附等温线符合Freundlich吸附等温式，β-CDP的吸附量远大于γ-CDP。在288 K下，2，4-DCP对β-CDP的最大吸附量为0.16 mmol/g，初始浓度为0.67 mmol/L。用乙醇作为洗涤溶剂，可以很容易地回收CDP，并且它们可以作为一种可循环使用的吸附剂。
The sorption of β-cyclodextrin polymer (β-CDP) and γ-cyclodextrin polymer (γ-CDP) toward 2,4-dichlorophenol (2,4-DCP) in aqueous solutions was investigated. The influence of sorption conditions including initial 2,4-DCP concentration, contact time and pH on sorption capability were discussed. Their sorption behaviors for 2,4-DCP were conducted and it was found the sorption kinetics followed the Ho and McKay equation and the film diffusion was the rate-determined step. The sorption isotherm can be correlated to Freundlich model and the sorption capacity on β-CDP was much larger than that on γ-CDP. The maximum sorption capacity of 2,4-DCP for β-CDP was measured to be 0.16 mmol/g with the initial concentration at 0.67 mmol/L at 288 K. The CDPs were easily recovered by ethanol as washing solvent and they could be used as a kind of recyclable sorbents.