高级氧化过程中高毒性中间氧化产物的电助吸附高效去除调控机制研究

芳香类有机污染物经高级氧化过程处理后会产生苯醌、对苯二酚和儿茶酚等高毒性中间氧化产物，有时候甚至会出现累积的现象。这类物质的毒性可达到原始污染物的二到三个数量级，对水质所产生的影响不容忽视。本研究拟选用吸附材料和电助吸附电极材料对高毒性中间氧化产物进行选择性高效吸附去除，以弥补高级氧化过程的不足。使用碳质材料或天然生物质材料进行吸附选择性筛选和选择性改性，用于高效吸附和电助吸附去除电催化氧化过程、光催化氧化过程和光电催化氧化过程所产生的高毒性中间氧化产物。通过吸附材料表面官能团改性等手段和发挥外加电场的作用，调控吸附去除效率，降低出水的毒性。进行斑马鱼急性毒性测试，评价各反应体系的毒性变化，探讨高级氧化过程与吸附过程匹配保证水质安全的必要性和可行性。该项研究集成了两种水处理工艺过程，从实际问题出发，具有较强的工程应用前景。

Benzoquinone, hydroquinone and catechol were proved to be generated during oxidation of aromatic pollutants by advanced oxidation processes (AOPs), and sometimes their accumulation was also observed. The toxicity of these oxidation intermediates amounts to 2 or 3 orders of the parental pollutants. Their effect on the evolution of water quality is expected to be unnegligible. In order to assist the application of AOPs, these oxidation intermediates are subjected to adsorption and electrochemically assisted adsorption (EAA) for selective and effective removal. Carbonaceous and natural bio-material will be screened for the selectivity modification, and used for the adsorption and EAD removal of oxidation intermediates produced in electrocatalytic oxidation, photocatalytic oxidation and photoelectrocatalytic oxidation processes. The adsorption efficiency is expected to be enhanced by methods such as grafting of functional groups, and the water toxicity could be reduced accordingly. Zebrafish acute toxicity tests will be conducted to evaluate the toxicity evolution for the three AOPs. The necessity and practicability of the integrity of AOPs and adsorption/EAA processes will also be evaluated. This research focused on the integrity of AOPs and adsorption/EAD processes, which is originated from the practical issues and is expected to lead to an engineering application in the very near future.