华侨大学学报（自然科学版）Issue(6)：687-692,6.DOI:10.11830/ISSN.1000-5013.2015.06.0687
β-环糊精交联聚合物吸附水中亚甲蓝的机理
Study on the Adsorption of Methylene Blue With theβ-cyclodextrin Crosslinked Polymer in the Water
摘要
Abstract
β-cyclodextrin crosslinked polymer (β-CDP)was fabricated with the aid of magnesium oxide (MgO)as pore-foaming agent and epichlorohydrin as a crosslinker forβ-cyclodextrin.Methylene blue (MB)adsorption on the surface of theβ-CDP was proved by FT-IR,SEM and EDX.Then,the kinetics and thermodynamics of the adsorption of MB from aqueous solution onto theβ-CDP was studied to explain the adsorption mechanism.Batch adsorption experiments were carried out to study the effects of solution pH,initial MB concentration,adsorbent dose,contact time and adsorption temperature on adsorption property.The results indicated thatβ-CDP presented the maximum MB uptake capacity of 62.6 mg·L-1 under the aqueous solution pH of 6.54,adsorbent dose of 0.6 g·L-1 ,the initial MB concentration of 40 mg·L-1 at room temperature.Kinetics experiments indicated that the pseudo-second-order model displayed the best cor-relation with adsorption kinetics data.And the isothermal adsorption was well described by Freundlich isotherm.Combine with the intra-particle model and the negative ΔG (-6.1--7.5 kJ·mol-1 )and positive ΔH (20.5 kJ·mol-1 )obtained from van′t Hoff equation,it could be discovered that the adsorption is a heterogeneous surfaces physical absorption with a multistep-controlling process.关键词
β-环糊精交联聚合物/吸附/亚甲蓝/动力学/热力学Key words
β-cyclodextrin crosslinked polymer/adsorption/methylene blue/kinetics/thermodynamics分类
化学化工引用本文复制引用
李国平,吴晓萍,黄泱,陈建华..β-环糊精交联聚合物吸附水中亚甲蓝的机理[J].华侨大学学报（自然科学版）,2015,(6):687-692,6.基金项目
国家自然科学基金资助项目（21076174）；福建省教育厅科研项目 （）
