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Investigation of the effects of humic acid and H2O2 on the photocatalytic degradation of atrazine assisted by microwave

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Abstract

A solution of atrazine in a TiO2 suspension, an endocrine disruptor in natural water, was tentatively treated by microwave-assisted photocatalytic technique. The effects of mannitol, oxygen, humic acid, and hydrogen dioxide on the photodegradation rate were explored. The results could be deduced as follows: the photocatalytic degradation of atrazine fits the pseudo-first-order kinetic well with k = 0.0328 s−1, and ·OH was identified as the dominant reactant. Photodegradation of atrazine was hindered in the presence of humic acid, and the retardation effect increased as the concentration of humic acid increased. H2O2 displayed a significant negative influence on atrazine photocatalysis efficiency. Based on intermediates identified with gas chromatography-mass spectrometry (GC-MS) and Liquid chromatography-mass spectrometry (LC-MS/MS) techniques, the main degradation routes of atrazine are proposed.

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Authors and Affiliations

  1. State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210093, China

    Chao Qin, Shaogui Yang, Cheng Sun & Jia Zhou

  2. Nanjing Research Institude of Environmental Protection, Nanjing, 210013, China

    Manjun Zhan

  3. Changzhou Environmental Monitoring Center, Changzhou, 210093, China

    Rongjun Wang & Huanxing Cai

Authors
  1. Chao Qin
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  2. Shaogui Yang
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  3. Cheng Sun
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  4. Manjun Zhan
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  5. Rongjun Wang
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  6. Huanxing Cai
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  7. Jia Zhou
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Correspondence to Cheng Sun.

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Qin, C., Yang, S., Sun, C. et al. Investigation of the effects of humic acid and H2O2 on the photocatalytic degradation of atrazine assisted by microwave. Front. Environ. Sci. Eng. China 4, 321–328 (2010). https://doi.org/10.1007/s11783-010-0238-6

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  • DOI: https://doi.org/10.1007/s11783-010-0238-6

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