微囊藻毒素的光催化降解技术和机理研究

项目名称： 微囊藻毒素的光催化降解技术和机理研究

项目编号： No.51209147

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 水利科学与海洋工程学科

项目作者： 邹曦

作者单位： 水利部中国科学院水工程生态研究所

项目金额： 25万元

中文摘要： 目前水体富营养化问题日益严重，富营养化水体中一些藻类产生的微囊藻毒素对人类健康产生了极大威胁。因此研究高效降解水体中藻毒素的处理方法和机理是水环境安全的重要保障。光催化降解微囊藻毒素是一种高效、无毒的技术方法，是近几年研究的热点。铌具有十分优良的催化剂所必备的稳定性和SMSI特征，含铌的类钙钛矿氧化物已广泛应用在环保催化领域。本项目将利用含铌类复合氧化物作为光催化剂，开展水体中微囊藻毒素的光催化降解机理研究。项目将通过试验分析，合成和改性含铌类复合氧化物，研究其光催化降解微囊藻毒素的降解效率和机理，并对微囊藻毒素降解的中间产物进行分析评价，探讨其光催化降解动力学特征及降解途径。预期成果可揭示含铌类复合氧化物光催化降解微囊藻毒素的降解机制，并为去除水体中微囊藻毒素提供高效环保的水处理技术，对缓解我国日益严重的水污染的问题和保障水环境安全具有重要的意义。

中文关键词： 光催化；藻毒素；降解；K6Nb10.8O30；异质结构

英文摘要： At present, water eutrophication has become more and more serious;and various cyanobacteria have quickly produced cyanobacteria have quickly produced cyanobacteria toxins-Microcystins (MCs) that threaten human health. Thus, the development of efficient and reliable water treatment technologies to control MCs is of great importance to protect water environment security. Photocatalytic degradation MCs is a kind of high efficient, non-toxic approach, which is the research focus in recent years. People found Niobium has stability and SMSI which is requisite for the high efficient photocatalyst, and a variety of niobates had been extensively applied in the field of environment protection and photocatalysis. An innovative photocatalyst niobates will be synthesized and doped, their performance in photo-degradation of MCs will be systematically investigated in this project. The degradation products will be analyzed and evaluated, and the degradation kinetics and mechanism will be discussed. The results of this work are expected to reveal the photo-degradation mechanism of MCs in water by niobates. This project could form a basis for the development of a novel effective water treatment technology to address the contamination of MCs.

英文关键词： photocatalytic；microcystin；degradation；K6Nb10.8O30；Heterostructures