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Photochemical degradation of polybrominated diphenyl ethers in microreactor

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Abstract

Knowledge of reaction mechanism and kinetics of persistent organic pollutants are crucial to development a removal technology. Feasibility of photochemical microreactor utilization as a tool for experimental investigation of photochemical degradation of polybrominated diphenyl ethers (PBDE) was studied. The degradation of deca-BDE in the photochemical microreactor with a thin irradiated liquid layer of variable thickness was investigated. The experimental results proved the significantly higher degradation rates of PBDE when compared to the published results obtained with the conventional photochemical reactors. After several minutes in microreactor the final and major degradation products were the mono brominated congeners. The extremely fast degradation of higher-brominated congeners allowed for the complete degradation of deca-BDE down to mono-BDE within short experimental times. The results confirmed the suitability of photochemical microreactors as beneficial tool for better understanding the degradation mechanism and kinetics of photodegradation of persistent organic pollutants due to significantly shorter experimental times needed for obtaining the necessary data.

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Acknowledgments

Financial support from the Czech Science Foundation Project No. GA104/09/0880 is gratefully acknowledged. J. Kristal also acknowledges support by the Czech Science Foundation Project No. P105/12/0664. S. Hejda also acknowledges support by the OPVK (Grant No. CZ.1.07/2.2.00/28.0205) and additional financial support by the Internal Grant Agency of the University of Jan Evangelista Purkyne in Usti nad Labem.

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Authors and Affiliations

  1. Institute of Chemical Process Fundamentals, Academy of Sciences of the Czech Republic, Rozvojova 2/135, 165 02, Prague 6, Czech Republic

    Z. Vajglova, M. Vondrackova, J. Kristal, P. Kluson & V. Jiricny

  2. Institute of Chemical Technology, Technicka 5, 166 28, Prague 6, Czech Republic

    M. Vesely

  3. Department of Technical Sciences, Faculty of the Environment, University of J. E. Purkyne in Usti nad Labem, Kralova Vysina 3132, 400 96, Usti nad Labem, Czech Republic

    S. Hejda

  4. Laboratory of Environmental Biotechnology, Institute of Microbiology, Academy of Sciences of the Czech Republic, Videnska 1083, 142 20, Prague 4, Czech Republic

    T. Cajthaml & Z. Kresinova

  5. Global Change Research Centre, AS CR, v. v. i., Branisovska 31, 375 05, Ceske Budejovice, Czech Republic

    J. Triska

Authors
  1. Z. Vajglova
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  2. M. Vesely
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  3. S. Hejda
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  4. M. Vondrackova
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  5. J. Kristal
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  7. Z. Kresinova
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  9. P. Kluson
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  10. V. Jiricny
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Correspondence to J. Kristal.

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Vajglova, Z., Vesely, M., Hejda, S. et al. Photochemical degradation of polybrominated diphenyl ethers in microreactor. Res Chem Intermed 41, 9373–9381 (2015). https://doi.org/10.1007/s11164-015-2033-2

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  • DOI: https://doi.org/10.1007/s11164-015-2033-2

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