氧化性碳基纳米过滤器对饮用水中微污染有机物的深度去除

项目名称： 氧化性碳基纳米过滤器对饮用水中微污染有机物的深度去除

项目编号： No.51208488

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 建筑环境与结构工程学科

项目作者： 张爱勇

作者单位： 中国科学技术大学

项目金额： 25万元

中文摘要： 饮用水中微污染有机物的去除一直是水质净化工艺的重点和难点。浓度低、传质慢和反应推动力小是制约饮用水中低浓度有机物有效去除的主要技术因素，而反应构筑物体积大、水力停留时间长、处理能力小、去除效果差和运行成本高是此类水质净化工艺的主要技术特征。本项目拟通过首先将饮用水中微污染有机物快速、高效富集到一维碳纳米管微滤层，再利用负载于微滤层的光催化剂和电催化剂在光源和电场共同作用下将被富集的微污染有机物进一步降解和矿化，从而达到吸附活性点位和吸附容量的完整再生，最终实现饮用水深度处理过程高效、持续和稳定运行的"污染物吸附富集-吸附质氧化降解-吸附剂原位再生"耦合新工艺。深入研究和探讨耦合工艺在微污染有机物深度去除过程中的去除效果、作用机制和工艺特性，为饮用水深度处理提供新的实用技术。

中文关键词： 饮用水；微污染物；光催化；电催化；深度处理

英文摘要： It is always a big challenge for the purification technologies to effectively remove the lowly-concentrated organics in drinking water. Low concentration, slow mass transfer and weak reaction-driving force are the main technical bottlenecks of the removing process, and consequently large reactor volume, long hydraulic retention time, low removal efficiency, small treatment capacity and high operation cost are the main technological characteristics of these water purification technologies. In this proposal, we proposed a combined method, "organics adsorbing concentration - adsorbed absorbates degradation - adsorbents in situ regeneration", for advanced treatment of drinking water. In the method, the slightly-polluted organics were firstly concentrated on carbon nanotube filtration layer, then the concentrated substrates were rapidly degradated and mineralized by photocatalyst and electrocatalyst that loaded within carbonaceous filtration layer under UV and external bias, finally the adsorption active sites and observed adsorption capacity of carbon nanotube filtration layer were effectively and in-situly regenerated, by all of which the water purification technology could be promised to operate effectively, continuously and stably. Systematic investigations on removal efficiency, mechanisms and properties of the

英文关键词： Drinking water；micro-pollutants；photochemical oxidation；electrochemical oxidation；deep treatment