Degradation kinetics and mechanism of aniline by heat-assisted persulfate oxidation

查看全文 作　　者：Xiaofang Xie[a];Yongqing Zhang[a][b];Weilin Huang[c];Shaobing Huang[a][b]

机构地区：[a] College of Environmental Science and Engineering and the Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou 510006, China ; [b] Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou 510275, China ; [c] Department of Environmental Sciences, Rutgers, The State University of New Jersey, New Brunswick, NJ 08901, USA ;

出　　处：《Journal of Environmental Sciences》索引2012年第24卷第5期,共6页

基　　金：supported by the Foundation of Science and Technology Planning Project of Guangdong Province(No. 2010B050200007);the Fundamental Research Funds for the Central Universities (No. 2011ZM0054);the Research Fund Program of Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology (China) (No. 2011K0013) 摘　　要：Oxidation of aniline by persulfate in aqueous solutions was investigated and the reaction kinetic rates under different temperature, persulfate concentration and pH conditions were examined in batch experiments. The results showed that, the aniline degradation followed pseudo first-order reaction model. Aniline degradation rate increased with increasing temperature or persulfate concentration. In the pH range of 3 to 11, a low aniline degradation rate was obtained at strong acid system (pH 3), while a high degradation rate was achieved at strong alkalinity (pH 11). Maximum aniline degradation occurred at pH 7 when the solution was in a weak level of acid and alkalinity (pH 5, 7 and 9). Produced intermediates during the oxidation process were identified using liquid chromatography-mass spectrometry technology. And nitrobenzene, 4-4’-diaminodiphenyl and 1-hydroxy-1,2-diphenylhydrazine have been identified as the major intermediates of aniline oxidation by persulfate and the degradation mechanism of aniline was also tentatively proposed. 关键词：过硫酸钾氧化反应动力学氧化降解降解机制苯胺 pH值水溶液降解率

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Degradation kinetics and mechanism of aniline by heat-assisted persulfate oxidation

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