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

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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.

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	金鑫
	刘梦稳
	谢新月
	魏一雄
	宋吉娜
	金鹏康
	王晓昌

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

Abstract：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.

Key words： electrocoagulation (EC) electro-hybrid ozonation-coagulation process (E-HOC) bipolar connection hydrolysed species

收稿日期: 2021-09-23

PACS:

X703.1

基金资助: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)

通讯作者: 金鹏康,教授,pkjin@xjtu.edu.cn E-mail: pkjin@xjtu.edu.cn

作者简介: 金鑫(1987-),男,陕西兴平人,副教授,博士,主要研究方向为污废水深度处理与资源化利用.发表论文30余篇.

引用本文:

金鑫, 刘梦稳, 谢新月, 魏一雄, 宋吉娜, 金鹏康, 王晓昌. 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[J]. 中国环境科学, 2022, 42(4): 1643-1651. JIN Xin, LIU Meng-wen, XIE Xin-yue, WEI Yi-xiong, SONG Ji-na, JIN Peng-kang, WANG Xiao-chang. Analysis of coagulant hydrolysed species in the electro-hybrid ozonation-coagulation process—Based on monopolar/bipolar electrode arrangement. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(4): 1643-1651.

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http://www.zghjkx.com.cn/CN/ 或 http://www.zghjkx.com.cn/CN/Y2022/V42/I4/1643

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