β-环糊精-聚乙烯亚胺修饰多功能磁性纳米复合体系构建及其吸附重金属性能研究

项目名称： β-环糊精-聚乙烯亚胺修饰多功能磁性纳米复合体系构建及其吸附重金属性能研究

项目编号： No.21307048

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 环境科学、安全科学

项目作者： 陈波

作者单位： 昆明理工大学

项目金额： 25万元

中文摘要： 有毒重金属离子引起的水体污染治理已成为水环境保护领域的研究热点和难点。吸附法被认为是目前最行之有效的重金属污染物去除方法之一。磁性纳米材料具有吸附能力强以及易于实现磁分离等特性，已在水污染治理领域得到广泛的应用。另外，磁性纳米粒子的高分子聚合物修饰在降低其毒性的同时，还能有效改善其水溶液稳定性和分散性、增强其吸附容量。本项目拟从磁性纳米粒子功能化的角度进行创新，通过简单的化学交联反应制备得到一种对重金属离子具有协同吸附性能的多功能磁性纳米复合吸附剂-β-环糊精修饰聚乙烯亚胺功能化磁性纳米颗粒（Fe3O4@ PEI-β-CD）。将其应用于模拟重金属污染水体的治理，系统研究材料结构、吸附条件等对吸附性能的影响，阐明治理重金属污染的高效吸附剂的设计和合成规律，探明其吸附机理。项目的顺利实施将进一步加深人们对纳米材料在水处理领域应用的认识，为污染物吸附剂的设计和吸附去除机理研究提供一定的理论依据。

中文关键词： 聚乙烯亚胺（PEI）；β-环糊精（β-CD）；重金属；有机染料；复合污染

英文摘要： Water pollution control caused by the toxic heavy metal ions has become a hot spot, as well as a problem in the field of water environment protection. Adsorption is considered to be one of the most effective strategies for heavy metals removal. Magnetic nanomaterials, with strong adsorption capacity and superparamagnetic property, have been widely used in the field of water treatment. In addition, the surface modification of magnetic nanoparticles with polymers can not only reduce its side effects, but also improve its stability and dispersibility in aqueous solution, thus enhancing its adsorption capacity. In this study, we are intending to fabricate a novel multifunctional magnetic nanocomposites with synergistic effect for heavy metals adsorption, namely magnetic nanocomposite functionalized by β-cyclodextrin-polyethyleneimine adducts denoted as Fe3O4@PEI-β-CD, by a simple chemical cross-linking reaction. The prepared nanocomposites will be applied to absorb the heavy metals in the model pollution system. The relationship between chemical composition, microstructure and the property of selective adsorption will be studied carefully. Emphasis will be put on investigating and concluding the general law of design and synthesis of effective adsorbents for heavy metals pollution. The smooth implementation of the p

英文关键词： Polyethyleneimine (PEI)；β-cyclodextrin (β-CD)；heavy metals；organic dyes；combined pullution