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    Photo-assisted electrochemical degradation of polychlorinated biphenyls with boron-doped diamond electrodes (2017)

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    Type of Content
    Journal Article
    UC Permalink
    http://hdl.handle.net/10092/17787
    
    Publisher's DOI/URI
    https://doi.org/10.1080/09593330.2017.1375999
    
    Publisher
    Informa UK Limited
    ISSN
    0959-3330
    1479-487X
    Language
    English
    Collections
    • Engineering: Journal Articles [1577]
    Authors
    Gutiérrez-Hernández RF
    Bello-Mendoza R
    Hernández-Ramírez A
    Malo EA
    Nájera-Aguilar HA
    show all
    Abstract

    © 2017 Informa UK Limited, trading as Taylor & Francis Group The capacity of the photo electro-Fenton (PEF) process to degrade a mixture of seven polychlorinated biphenyl (PCB) congeners was studied. Boron-doped diamond (BDD) sheets were used as anode and cathode in the experimental electrolytic cell that contained Na 2 SO 4 0.05 M at pH 3 as supporting electrolyte for the electro generation of H 2 O 2 at the cathode. The effects of UV light intensity (254 and 365 nm), current density (8, 16 and 24 mA cm −2 ) and ferrous ion dosage (0.1, 0.2 and 0.3 mM) on PCB (C 0 = 50 μg L −1 ) degradation were evaluated. The highest level of PCB degradation (97%) was achieved with 16 mA cm −2 of current density, 0.1 mM of ferrous ion and UV light at 365 nm as irradiation source after 6 h of reaction. PCB28, PCB52 and PCB101 were not detected after 0.5, 1.5 and 3 h of reaction, respectively. The degradation of PCB138, PCB153, PCB180 and PCB209 was also high ( > 95%). The PEF system outperformed other oxidation processes (electro-Fenton, anodic oxidation, Fenton, photo-Fenton and UV photolysis) in terms of reaction rate and degradation efficiency. These results demonstrate for the first time the degradation of PCB209, the most highly chlorinated PCB congener, by an advanced electrochemical oxidation process.

    Citation
    Gutiérrez-Hernández RF, Bello-Mendoza R, Hernández-Ramírez A, Malo EA, Nájera-Aguilar HA (2017). Photo-assisted electrochemical degradation of polychlorinated biphenyls with boron-doped diamond electrodes. Environmental Technology. early access online(1).
    This citation is automatically generated and may be unreliable. Use as a guide only.
    Keywords
    Advanced electrochemical oxidation processes; BDD electrodes; PCB209; persistent organic pollutants; photo electro-Fenton system
    ANZSRC Fields of Research
    09 - Engineering::0904 - Chemical Engineering::090499 - Chemical Engineering not elsewhere classified
    34 - Chemical sciences::3406 - Physical chemistry::340604 - Electrochemistry
    34 - Chemical sciences::3405 - Organic chemistry::340599 - Organic chemistry not elsewhere classified
    09 - Engineering::0907 - Environmental Engineering::090703 - Environmental Technologies

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