高效钴-碳酸氢盐类Fenton催化剂的固载化设计及其处理废水难降解有机污染物的机制研究

项目名称： 高效钴-碳酸氢盐类Fenton催化剂的固载化设计及其处理废水难降解有机污染物的机制研究

项目编号： No.21207105

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 环境化学

项目作者： 徐爱华

作者单位： 武汉纺织大学

项目金额： 26万元

中文摘要： 过渡金属配合物类Fenton催化体系作为去除废水难降解有机污染物的一种有效方法得到了普遍关注，但还存在制备过程复杂、成本高和过氧化氢利用率低等缺陷。本项目拟在前期研究简单高效的钴-碳酸氢盐均相类Fenton催化剂的基础上，针对该体系存在钴离子毒性强和碳酸氢盐使用量较高的问题，利用有机胺类化合物能显著提高其降解有机污染物活性的特点，通过氨基的桥键作用实现钴离子的固载化。主要研究内容包括考察有机胺的pKb值和立体结构以及载体类型对催化性能的影响，构建在低浓度碳酸氢盐溶液中具有高活性和稳定性的负载钴催化剂，并采用多种表征和分析手段，研究该体系分解过氧化氢和降解污染物的动力学，分析中间活性物种和降解产物，探讨原位形成的钴配合物的结构，阐明该配合物活化过氧化氢去除污染物的内在机制。本项目的研究可为新型类Fenton催化剂的研制和实际应用提供理论基础和技术支持。

中文关键词： 负载；钴；碳酸氢根；有机污染物；降解

英文摘要： Fenton-like process has proved to be highly effective in the degradation of persistent toxic substances in wastewaters, and has been received much attention recently; however, the currently developed metal complex catalysts are cost effectiveness, low efficiency in hydrogen peroxide utilization, and complex in preparation process. In our previous studies, the cobalt-bicarbonate system has been reported as a simple and reactive Fenton-like catalyst for degradations of organic pollutants at room temperature with hydrogen peroxide as an oxidant, and more recently, we found that the activity of the system can be remarkably enhanced after conjunction with an organic amine (monoethanolamine).Base on these results, it is determined in this research project to prepare the supported cobalt catalyst through bonding by amino group. In order to develop the highly active heterogeneous cobalt catalyst in low concentration of sodium bicarbonate, the effects of various carriers and organic amines with different pKb values and steric structures will be discussed。 At the same time, the synthesis conditions will be optimized and the catalytic effects for treatment of various pollutants will be checked. After the catalyst is selected, the kinetics of hydrogen peroxide decomposition and organic pollutants degradation, the produced

英文关键词： immobilization；cobalt；bicarbonate；organic pollutant；degradation