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Nanometer Titanium Dioxide Mediated High Efficiency Photodegradation of Fluazifop-p-Butyl

Author

Listed:
  • Guangling Li

    (School of Resources and Environmental Sciences, Jilin Agricultural University, Changchun 130118, China
    School of Resources and Environmental Sciences, Henan Institute of Science and Technology, Xinxiang 453003, China)

  • Zhiguang Hou

    (School of Resources and Environmental Sciences, Jilin Agricultural University, Changchun 130118, China)

  • Ruihong Zhang

    (School of Resources and Environmental Sciences, Jilin Agricultural University, Changchun 130118, China)

  • Xiling Chen

    (School of Resources and Environmental Sciences, Henan Institute of Science and Technology, Xinxiang 453003, China)

  • Zhongbin Lu

    (School of Resources and Environmental Sciences, Jilin Agricultural University, Changchun 130118, China)

Abstract

The widespread use of fluazifop-p-butyl (FPB) contributes to its presence in the environment. Considering the ecological risks of FPB residues in the environment, the anatase nanometer titanium dioxide (nano-TiO 2 ) mediated photocatalytic degradation of FPB was studied by smearing FPB and nano-TiO 2 together on a glass plane; illumination, trimethylsilane derivatization of photolysis products, high performance liquid chromatography (HPLC) quantitative analysis and gas chromatograph-mass spectrometer (GC-MS) identification were used. Results showed that the first order dynamic model could describe the photodegradation of FPB by nano-TiO 2 mediated, and the photodegradation and photosensitization rates were found to be positively correlated with the dose of nano-TiO 2 at lower dose ranges. It is noticeable that a strong photosensitization effect was exhibited on degradation of FPB, not only under high-pressure mercury lamps, but also simulated sunlight (xenon lamp light). Ultimately, twelve main photolytic products were reasonably speculated, whilst five photolysis pathways were proposed. These results together suggest that nano-TiO 2 can be used as an effective photosensitizer to accelerate FPB photolysis.

Suggested Citation

  • Guangling Li & Zhiguang Hou & Ruihong Zhang & Xiling Chen & Zhongbin Lu, 2019. "Nanometer Titanium Dioxide Mediated High Efficiency Photodegradation of Fluazifop-p-Butyl," IJERPH, MDPI, vol. 16(19), pages 1-11, September.
    • Handle: RePEc:gam:jijerp:v:16:y:2019:i:19:p:3600-:d:270848
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