超分子修饰纳米铁膜对水环境中亚硝基胺的降解及界面转化机理研究

项目名称： 超分子修饰纳米铁膜对水环境中亚硝基胺的降解及界面转化机理研究

项目编号： No.41301542

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 天文学、地球科学

项目作者： 张环

作者单位： 天津工业大学

项目金额： 25万元

中文摘要： 存在于环境水体中的亚硝基二甲胺（NDMA）污染物具有强致癌性，其在水体中浓度低、难降解，难以采用传统水处理技术进行处理，迫切需要建立新型的高效去除方法及原理。本项目设计合成具有选择性识别、还原降解NDMA功能的环糊精超分子修饰纳米铁自组装膜，表征膜层中纳米铁的微观结构及化学性能；研究修饰型纳米铁的结构性能与降解转化NDMA效能的关系，获得优化纳米铁性能的结构调控机制；研究NDMA污染物在纳米铁膜表界面的还原转化途径，揭示污染物在固/液界面吸附-还原反应的本质和机理；探明复杂水体环境条件对修饰型纳米铁膜降解污染物的影响机制。该研究为解决水环境中亚硝基胺类强致癌物的污染问题开辟了一条新的途径，发展了纳米铁还原降解NDMA的基本原理和方法，在水质深度净化及提高水质安全方面具有重要的应用价值。

中文关键词： NDMA；Fe0；组装膜；界面反应；配位

英文摘要： N-nitrosodimethylamine (NDMA) in natural water was strong carcinogenic compound which was difficult to be degraded by the current alternative treatment methods. There is considerable need for the high-efficiency method to remove the pollutant. In this research, super-molecule cyclodextrin modified nano iron was self-assembled in the surface of polymer membrane. This modified nano iron membrane could efficiently selective capture and degrade NDMA due to its special surface structure and chemical property. The structure of nano iron and assembled layer should be characterized in the study. The relevance between the physicochemical property of nano iron and its efficiency for NDMA reduction should be studied in this research .To elucidate the adsorption and reduction mechanism of NDMA by modified nano iron membrane, the microcosmic structure of nano iron and the transformation processing of NDMA in the material surface could be researched. The influence of coexisting mater in natural water and environmental factor on NDMA removing by nano iron will also be investigated. This research should provide a new approach to resolve the NDMA pollution and develop the method and theory on account of nano iron reduction. Therefore, this research has important significance both theoretical and practical in water deep purificat

英文关键词： NDMA；Fe0；assembled membrane；interface；coordination