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Effect of chelating agent on oxidation rate of aniline in ferrous ion activated persulfate system at neutral pH

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Abstract

In the interest of accelerating aniline degradation, Fe2+ and chelated Fe2+ activated persulfate oxidations were investigated in neutral pH condition. Three kinds of chelating agents were selected including citric acid, oxalic acid and ethylenediamine tetraaceatate (EDTA) to maintain available Fe2+. The results indicate that the concentration of chelating agent and ferrous ion didn’t follow a linear relationship with the degradation rate of aniline. A 1/1 ratio of chelating agent/Fe2+ results in a higher degradation rate compared to the results by other ratios. The oxidation enhancement factor using oxalic acid was found to be relatively low. In contrast, citric acid is more suitable chelating agent in the ferrous iron activated persulfate system and aniline exhibits a highest degradation with a persulfate/Fe2+/citric acid/aniline molar ratio of 50/25/25/1 compared to other molar ratios.

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Authors and Affiliations

  1. College of Environment and Energy, South China University of Technology, Guangzhou, 510006, China

    Yong-qing Zhang  (张永清), Xiao-fang Xie  (谢晓芳), Shao-bin Huang  (黄少斌) & Hai-yun Liang  (梁海云)

  2. Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, Guangzhou, 510006, China

    Yong-qing Zhang  (张永清) & Shao-bin Huang  (黄少斌)

  3. State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, 510640, China

    Shao-bin Huang  (黄少斌)

Authors
  1. Yong-qing Zhang  (张永清)
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  2. Xiao-fang Xie  (谢晓芳)
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  3. Shao-bin Huang  (黄少斌)
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  4. Hai-yun Liang  (梁海云)
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Correspondence to Yong-qing Zhang  (张永清).

Additional information

Foundation item: Project(2010B050200007) supported by the Foundation of Science and Technology Planning Project of Guangdong Province, China; Project(2011ZM0054) supported by the Fundamental Research Funds for the Central Universities, China; Project(2011K0013) supported by the Research Fund Program of Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, China; Project(2012) supported by the Research Funds of Guangdong Provincial Key Laboratory of Atmospheric environment and Pollution Control, China

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Zhang, Yq., Xie, Xf., Huang, Sb. et al. Effect of chelating agent on oxidation rate of aniline in ferrous ion activated persulfate system at neutral pH. J. Cent. South Univ. 21, 1441–1447 (2014). https://doi.org/10.1007/s11771-014-2083-4

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  • DOI: https://doi.org/10.1007/s11771-014-2083-4

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