城市污水二级处理出水中不同种类PPCPs的臭氧氧化效果与机制研究  

Comparative study on ozonation efficiency and mechanism of different types of PPCPs in secondary effluent from municipal wastewater

作　　者：牙柳丁 王文龙[1] 胡洪营[1,2] 吴乾元 巫寅虎 陈卓[1] YA Liuding;WANG Wenlong;HU Hongying;WU Qianyuan;WU Yinhu;CHEN Zhuo(State Key Joint Laboratory of Environmental Simulation and Pollution Control,School of Environment,Tsinghua University,Beijing 100084;Shenzhen Environmental Science and New Energy Technology Engineering Laboratory,Tsinghua-Berkley Shenzhen Institute,Tsinghua University,Shenzhen 518055;Key Laboratory of Microorganism Application and Risk Control of Shenzhen,Graduate School at Shenzhen,Tsinghua University,Shenzhen 518055)

机构地区：[1]清华大学环境学院,环境模拟与污染控制国家联合重点实验室,北京100084 [2]清华-伯克利深圳学院,深圳环境科学与新能源技术工程实验室,深圳518055 [3]清华大学深圳国际研究生院,国家环境保护环境微生物利用与安全控制重点实验室,深圳518055

出　　处：《环境科学学报》2020年第11期3868-3876,共9页Acta Scientiae Circumstantiae

基　　金：国家自然科学基金重点项目(No.51738005);北京市科技计划课题(No.Z181100005518001)。

摘　　要：研究了臭氧氧化对城市污水二级处理出水中15种典型药品和个人护理品(PPCPs)的去除效果及O3分子氧化和·OH自由基氧化的贡献.结果表明,PPCPs的臭氧氧化去除效果与其亲核官能结构特性相关,芳香胺结构为主的PPCPs易降解,烷基胺结构为主的PPCPs可部分降解,亲核特性较弱的双键为主的PPCPs难降解;在臭氧投加量为5.5 mg·L-1条件下,这3类PPCPs的去除率为分别为大于95%、57%~68%和39%~57%.臭氧氧化过程中,O3分子氧化和·OH自由基氧化均起重要作用.易降解PPCPs的氧化机制以O3分子氧化为主,贡献率为82%~91%;可降解和难降解PPCPs的氧化机制以·OH自由基氧化为主,贡献率分别为48%~71%和66%~94%.二级出水中臭氧氧化过程中,UVA254去除率可呈单线性或分段线性指示PPCPs的去除效率.The ozonation of 15 representative PPCPs in the secondary effluent of municipal wastewater treatment plant was studied.According to the nucleophilic functional structure and removal efficiency,these PPCPs can be classified as the highly degradable PPCPs with aromatic amine structure,the moderately degradable PPCPs with alkylamine structure,and the slightly degradable PPCPs with carbon double⁃bond,with the removals being>95%,57%~68%,and 39%~57%,respectively.Both O3 molecular oxidation and·OH radical oxidation contributed to the ozonation of PPCPs.The O3 molecular oxidation dominantly contributed to the removal of highly degradable PPCPs,with the contribution being 82%~91%,while the·OH radical oxidation dominantly contributed to the removals of moderately and slightly degradable PPCPs,with contributions being 48%~71%and 66%~94%,respectively.During oxidation,the removal of UVA254 cansurrogate the removal of PPCPs by ozonation linealy or two⁃style linearly.

关 键 词：城市污水 深度处理 臭氧氧化 药品和个人护理品 自由基 紫外吸光度 

分 类 号：X703[环境科学与工程—环境工程]