光电功能性分离膜的制备及其对水中有机污染物的光电联合去除机制研究

项目名称： 光电功能性分离膜的制备及其对水中有机污染物的光电联合去除机制研究

项目编号： No.51478075

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 其他

项目作者： 陈硕

作者单位： 大连理工大学

项目金额： 82万元

中文摘要： 痕量有毒有机污染物在传统水处理工艺中无法有效去除，对水生生态及人体健康产生不良影响。光催化与膜过滤的结合，可有效净化废水中风险性有机污染物，同时减缓膜污染。但在光与膜的耦合过程中，光能利用效率低是主要的技术瓶颈。本项目创新性地提出通过在光催化层与膜基底之间增加导电碳层，制成光电功能性分离膜，引入外加低压电场，有效抑制光催化过程中光生电荷的复合，从而显著提高污染物的去除效率。主要工作包括：具有可见光和紫外光响应的基于不同材料的光电功能性分离膜的制备及性能调控方法；分离膜的光学性质和电学性质与水处理性能间相关性的规律研究；分离膜对典型有机污染物的分离与分解机理；分离膜的水处理性能优化与调控。通过本项目的研究，认识光电功能性分离膜对污染物的强化去除的技术特性、过程原理，阐明光、电、膜之间的协同作用机理，为该技术的应用提供科学依据和理论支撑，为废水深度处理资源化利用提供一种高效的可实用化创新技术。

中文关键词： 光电催化；膜污染；协同作用；深度水处理；水污染控制

英文摘要： Trace toxic organic pollutants could not be removed effectively by traditional wastewater treatment plants, displaying negative effects on the aquatic ecology and health of human beings, even exhibiting acute toxicity to some aqueous organisms. The integration of photocatalysis and membrane gave an approach to the purification of the reluctant toxic substance and could alleviate membrane fouling. However, the low photoconversion is one of the main problems restricting the practical application of photocatalytic membrane. Aiming at improving the photoconversion, we put forward an idea that introduce a carbon layer under the photocatalytic layer, and pose a low potential on the electric carbon layer to inhabit the combination of photogenerated carriers and hence achieve the enhanced degradation and removal of pollutants. The main contents include: (1) Fabrication and characterization of electro-assisted photocatalytic membrane with visible or UV light response; (2) Develop the relationship between water treatment capability with photo and electric characteristics of composite membrane; (3) The separation and degradation mechanisms of typical organic pollutants with the composite membrane; (4) The optimization and modulation of the water treatment capability of the membrane. The main objectives of this program are to recognize the technical characteristics and pricinples of the enhanced removal of pollutants of the electro-assisted photocatalytic membrane, to elucidate the mechanisms of integrated photo, electricity and membrane, and to provide the scientific supports for the application of this novel technique for the advanced wastewater treatment.

英文关键词： electro-assisted photocatalytic;membrane fouling;integration;advanced wastewater treatment;water pollution control