基于分子印迹技术的多相类Fenton的选择性催化氧化及机理研究

项目名称： 基于分子印迹技术的多相类Fenton的选择性催化氧化及机理研究

项目编号： No.21267002

项目类型： 地区科学基金项目

立项/批准年度： 2013

项目学科： 环境科学、安全科学

项目作者： 张媛媛

作者单位： 广西大学

项目金额： 50万元

中文摘要： 多相类Fenton催化氧化法是处理有机难降解废水的有效技术之一，然而，其主要以羟基自由基作为氧化剂降解废水中的有机污染物，选择性较差，致使废水中本可采用更经济的生物法处理的易降解有机物被羟基自由基氧化，造成了H2O2的浪费，增加了废水的处理成本。因此，增强多相类Fenton氧化选择性的研究具有重要的意义。本研究将分子印迹技术与多相类Fenton催化氧化技术相结合，利用Al3+的路易斯酸性质特异性的识别本身也是路易斯碱的目标污染物氯酚，并利用SiO2与H2O2形成的氢键富集H2O2，制备出含SiO2及Al3+的无机分子印迹型多相类Fenton催化剂。在催化剂选择性吸附氯酚及富集H2O2的基础上，实现在有干扰物存在时多相类Fenton对氯酚的选择性催化氧化，为提高含氯酚废水可生化性，使其作为预处理技术与生物处理技术相结合，提供了一定的理论基础，并为Fenton技术的发展提供出一条新的思路。

中文关键词： 分子印迹；Fenton-like；选择性氧化；吸附；氯酚

英文摘要： Heterogeneous Fenton-like catalysis is an effective technology for the treatment of wastewater containing non-biodegradable organic pollutants. However, the selective capability of heterogeneous Fenton-like was poor because the main oxidant for the organic pollutants was hydroxyl radicals. Thus, the treatment cost was increased as the high concentration of biodegradable organic pollutants in waste water was oxidized by hydroxyl radical which came from H2O2.Therefore,it is important to enhance the selective capability. In this study, the molecular imprinting technique was used to prepare heterogeneous Fenton-like catalyst, using the Lewis acid properties of Al3+ to specifically recognize the target pollutants chlorophenol which itself was a Lewis alkali. SiO2 was introduced to enrich H2O2 because of the formation of hydrogen bond between SiO2 and H2O2. Therefore, the inorganic molecular imprinting catalyst containing SiO2 and Al3+ was prepared and used for the selective adsorption of chlorophenols and H2O2. Finally, the aim of the study was to selectively oxidize chlorophenols to improve the biodegradability of wastewater. The heterogeneous Fenton-like was thus used as the pretreatment technology for biological treatment. The study provided a theoretical basis and a new idea for the development of

英文关键词： molecular imprinting；Fenton-like；selective oxidation；adsorption；pentachlorophenol