Pilot scale mineralization of organic acids by electro-Fenton ® process plus sunlight exposure

Juan Casado, Jordi Fornaguera, Maria Isabel Galán

    Research output: Contribution to journalArticleResearchpeer-review

    14 Citations (Scopus)

    Abstract

    The viability of the electro-Fenton ® degradation of aqueous solutions of benzoic acid, 2,4-dichlorophenoxyacetic acid and oxalic acid has been studied at 20 A using a pilot flow reactor containing an anode and an oxygen diffusion cathode, both of 100 cm 2 section. Pollutants were preferentially oxidized by hydroxyl radicals formed in solution from reaction of Fe 2+ with electrogenerated H 2 O 2 , allowing mineralization of benzoic acid and 2,4-D. For oxalic acid no electrochemical mineralization was observed. After electrolysis, samples of the different effluents were exposed to sunlight (Helielectro-Fenton process) and almost complete mineralization was reached after ca. 30-50 min without additional cost. Effects of parameters such as electrolysis time, pH and solar irradiation time on the process efficiencies were studied. © 2006 Elsevier Ltd. All rights reserved.
    Original languageEnglish
    Pages (from-to)2511-2516
    JournalWater Research
    Volume40
    Issue number13
    DOIs
    Publication statusPublished - 1 Jul 2006

    Keywords

    • Electro-Fenton
    • Electrochemical mineralization
    • Helielectro-Fenton
    • Organic acids
    • Pilot reactor
    • Wastewater treatment

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