电凝聚臭氧化耦合工艺混凝剂水解形态分析——基于单/双电极排布  

Analysis of coagulant hydrolysed species in the electro-hybrid ozonation-coagulation process——Based on monopolar/bipolar electrode arrangement

作　　者：金鑫[1,2] 刘梦稳[1] 谢新月 魏一雄 宋吉娜 金鹏康[1,2] 王晓昌[1] JIN Xin;LIU Meng-wen;XIE Xin-yue;WEI Yi-xiong;SONG Ji-na;JIN Peng-kang;WANG Xiao-chang(School of Environmental and Municipal Engineering,Xi'an University of Architecture and Technology,Xi’an 710055,China;School of Human Settlements and Civil Engineering,Xi'an Jiaotong University,Xi'an 710049,China)

机构地区：[1]西安建筑科技大学环境与市政工程学院,陕西西安710055 [2]西安交通大学人居环境与建筑工程学院,陕西西安710049

出　　处：《中国环境科学》2022年第4期1643-1651,共9页China Environmental Science

基　　金：国家自然科学基金资助项目(52070151,51908177);陕西省重点研发计划项目(2021ZDLSF05-06)。

摘　　要：探究了不同初始pH值和不同电极布置条件下电凝聚臭氧化耦合工艺(E-HOC)中混凝剂的水解形态特征,同时进行了效能分析.结果表明,初始pH值为5时,E-HOC工艺具有更高的有机物去除效率,与单极排布的E-HOC工艺相比,双极排布的E-HOC工艺的有机物去除效率提高了12.29%,能耗降低了1.74kWh/g,法拉第效率提高了2.37%.通过Ferron法和电喷雾电离质谱(ESI-MS)法对体系中铝形态进行分析,在E-HOC工艺中,初始pH值为5和双极排布方式均有利于优势水解形态的生成,促进了聚合态水解物种的形成,从而在提升臭氧催化性能的同时,提高了体系的混凝特性.In this paper, the hydrolysed coagulant species in the electro-hybrid ozonation-coagulation process(E-HOC) were analysed at different initial pH and different electrode arrangement conditions, and the removal efficacy was investigated. The results showed that a higher organic matter removal efficiency was exhibited at initial pH 5in the E-HOC process. Compared with the E-HOC process with monopolar connections, the organic matter removal efficiency of the bipolar arrangement is improved by 12.29%, energy consumption is reduced by 1.74kWh/g, and Faradaic efficiency is improved by 2.37%. Ferron analysis and electrospray ionization mass spectrometry(ESI-MS) were used to analyze the hydrolysed Al species of the system. In the E-HOC process, weak acid conditions(initial pH 5) and bipolar arrangement can lead to the enhanced polymeric species generation, which improved both the coagulation and catalytic ozonation ability in the E-HOC system.

关 键 词：电絮凝(EC) 电凝聚臭氧化耦合(E-HOC) 双极连接 水解物种 

分 类 号：X703.1[环境科学与工程—环境工程]