Chapter

Environmental Photochemistry Part III

Volume 35 of the series The Handbook of Environmental Chemistry pp 301-342

Date:

Fundamentals and Applications of the Photo-Fenton Process to Water Treatment

  • Fernando S. García EinschlagAffiliated withInstituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata
  • , André M. BraunAffiliated withEngler-Bunte-Institut, Karlsruher Institut für Technologie (KIT)
  • , Esther OliverosAffiliated withLaboratoire des Interactions Moléculaires et Réactivité Chimique et Photochimique (IMRCP), UMR 5623-CNRS/UPS, Université Toulouse III (Paul Sabatier) Email author 

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Abstract

Among Advanced Oxidation Processes (AOPs), the Fenton process and the photochemically enhanced or assisted Fenton process, commonly called photo-Fenton, are considered to be among the most efficient for the oxidative degradation of a large variety of organic contaminants in aqueous systems. These processes, based on the generation of highly oxidizing species (hydroxyl radicals and possibly others) from hydrogen peroxide and Fe ions, may be counted among the few methods that are actually applied on a technical scale for an abiotic (pre-)treatment of wastewaters. With close to 5,000 articles published on this topic during the last decade, covering both fundamental aspects and applications, this chapter is restricted to a selective overview of the photo-Fenton process applied to water treatment. It briefly recalls the fundamentals of the Fenton reaction, describes the main lines of research for process enhancement and economic feasibility, summarizes the essentials determining the primary process parameters, and discusses the present state of technical development and its priorities.

Keywords

Degradation of organic pollutants Fenton and photo-Fenton processes Photochemical water treatment Technical development