Mineralisation of 2,4-dichlorophenoxyacetic acid by acoustic or hydrodynamic cavitation in conjunction with the advanced Fenton process

David H. Bremner, Stefano Di Carlo, Anand G. Chakinala, Giancarlo Cravotto

    Research output: Contribution to journalArticlepeer-review

    72 Citations (Scopus)
    88 Downloads (Pure)

    Abstract

    The mineralisation of 2,4-dichlorophenoxyacetic acid (2,4-D) in the presence of zero-valent iron and hydrogen peroxide (the Advanced Fenton process – AFP) whilst being subjected to acoustic or hydrodynamic cavitation is reported. If the reaction is merely stirred then there is 57% removal of TOC whilst on irradiation the figure is 64% although the latter reaction is more rapid. Use of ultrasound alone results in only 11% TOC removal in 60 min of treatment time. Addition of iron powder marginally enhances the extent of degradation but an appreciable increase is observed in the presence of hydrogen peroxide which acts as a source for hydroxyl radicals by Fenton chemistry as well as by dissociation in the presence of ultrasound. The use of hydrodynamic cavitation in conjunction with the advanced Fenton process has also been found to be a useful tool for continuous remediation of water contaminated with 2,4-D. After 20 minutes of treatment the residual TOC is reduced to 30% and this probably represents the remaining highly recalcitrant small organic molecules.
    Original languageEnglish
    Pages (from-to)416-419
    Number of pages4
    JournalUltrasonics Sonochemistry
    Volume15
    Issue number4
    DOIs
    Publication statusPublished - Apr 2008

    Keywords

    • Zero valent iron
    • Hydrogen peroxide
    • Total organic carbon
    • Advanced Fenton process
    • Cavitation

    Fingerprint

    Dive into the research topics of 'Mineralisation of 2,4-dichlorophenoxyacetic acid by acoustic or hydrodynamic cavitation in conjunction with the advanced Fenton process'. Together they form a unique fingerprint.

    Cite this