水溶液中石墨烯纳米材料促进有机污染物转化与降解行为研究

项目名称： 水溶液中石墨烯纳米材料促进有机污染物转化与降解行为研究

项目编号： No.21477145

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 化学工程及工业化学

项目作者： 裴志国

作者单位： 中国科学院生态环境研究中心

项目金额： 90万元

中文摘要： 石墨烯纳米材料除了能够吸附水中的污染物外，还会对所吸附的一些有机污染物产生转化与降解作用。但是迄今为止，人们对自然环境条件下石墨烯纳米材料促进有机污染物转化与降解的行为知之甚少。本项目拟选择几类不同结构与性质的有机污染物作为研究对象，研究石墨烯纳米材料存在条件下它们在溶液中的转化与降解行为。探讨石墨烯纳米材料和各种自然环境因素（如pH、溶解氧和可溶性有机质等）在污染物降解反应中的作用。总结出石墨烯纳米材料促进有机污染物降解的规律。并利用多种谱学手段如质谱、红外光谱和电子自旋共振光谱等探讨产生这种现象的微观机理。通过本项目的研究希望能够为石墨烯纳米材料在环境中的应用及污染物的环境行为评价提供实验依据。

中文关键词： 石墨烯纳米材料；有机污染物；水溶液；转化；降解

英文摘要： It is found that graphene-based nanomaterials (GBNs) not only can adsorb contaminants from water, but also have the potential to mediate the transformation and degradation of some adsorbed organic contaminants. However, to date, little information is available regarding the possible mediated role of GBNs on the transformation and degradation of organic contamiants in the environment. In this study, we examine the transformation and degradation of several kinds of organic contaminants with different chemical structures in the presence of GBNs in aqueous solution. The relationship between the chemical structures of organic contaminants and the degradation reaction is studied. The roles of GBNs and environmental factors (such as solution pH, dissolved oxygen and dissolved organic matter etc.) in the degradation reaction of organic contaminants are also discussed. Finally, the degradation mechanisms of organic contamiants mediated by GBNs are investigated using mass spectrometry, Fourier transform infrared spectroscopy, and electron spin resonance ect. Through this study, we want to reveal the possibility that GBNs mediate the transformation and degradation of some organic contaminants in the environment. Relevant knowledge of this study will help the application of GBNs in environmental pollution cleanup, and help to improve the risk assessment of the fate of organic contaminants in the environment.

英文关键词： graphene-based nanomaterials;organic contaminants;aqueous solution;transformation;degradation