Identification and application of Phyto-Fenton reactions

Yoshihiko Inagaki, Vo Huu Cong, yutaka Sakakibara

    Research output: Contribution to journalArticle

    7 Citations (Scopus)

    Abstract

    The formation of hydroxyl radicals (•OHs) by aquatic plants was investigated using electron-spin-resonance (ESR) spectroscopy and fluorescence microscopy. ESR observations, using 5- (diethoxyphosphoryl)-5-methyl-pyrroline N-oxide as a trapping agent, indicated that the signals produced by aquatic plants ground with ferrous iron ions are almost identical to those produced by Fenton's reagent. In addition, fluorescence was observed in the oxidized form of aminophenyl fluorescein in the presence of ferrous ions as well as any particles of colloidal ferrihydrite, magnetite, and ferric-ion-exchanged zeolite, while no fluorescence appeared in the absence of these iron compounds. Moreover, fluorescence-microscopy observations demonstrated that fluorescence mainly occurs on the surface of aquatic plants at neutral pH in the presence of the latter three solid iron compounds, implying the occurrence of heterogeneous phyto-Fenton reactions utilizing endogenous hydrogen peroxide (H2O2) in the aquatic plants. Furthermore, batch treatments of the pollutant 17α-ethinylestradiol (EE2), using colloidal ferrihydrite iron, indicated the feasible removal of EE2 with enhanced performance, lower-or apparently no-consumption of endogenous H2O2, and no significant stress to the aquatic plants. We concluded that the treatment of environmental pollutants through •OH formations via heterogeneous phyto-Fenton reactions should be a feasible alternative to conventional wastewater and water-treatment processes.

    Original languageEnglish
    Pages (from-to)1443-1450
    Number of pages8
    JournalChemosphere
    Volume144
    DOIs
    Publication statusPublished - 2016 Feb 1

    Fingerprint

    aquatic plant
    Iron Compounds
    Iron compounds
    fluorescence
    Fluorescence microscopy
    Fluorescence
    Ions
    Iron
    iron
    Ferrosoferric Oxide
    ferrihydrite
    Electron spin resonance spectroscopy
    Electron Spin Resonance Spectroscopy
    Zeolites
    electron spin resonance
    Environmental Pollutants
    Ethinyl Estradiol
    Fluorescence Microscopy
    Magnetite
    ion

    Keywords

    • Aquatic plant
    • Electron spin resonance technique
    • Fluorescence microscopy
    • Heterogeneous iron catalyst
    • Phyto-Fenton reaction

    ASJC Scopus subject areas

    • Environmental Chemistry
    • Chemistry(all)

    Cite this

    Identification and application of Phyto-Fenton reactions. / Inagaki, Yoshihiko; Cong, Vo Huu; Sakakibara, yutaka.

    In: Chemosphere, Vol. 144, 01.02.2016, p. 1443-1450.

    Research output: Contribution to journalArticle

    Inagaki, Yoshihiko ; Cong, Vo Huu ; Sakakibara, yutaka. / Identification and application of Phyto-Fenton reactions. In: Chemosphere. 2016 ; Vol. 144. pp. 1443-1450.
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