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Cited by 2,346

The DOI matches its Crossref record; 210 of the 210 references it cites were found in a registry or an index.

Direct And Mediated Anodic Oxidation of Organic Pollutants

Panizza, Marco, Cerisola, Giacomo·2009·Chemical Reviews
DOI 10.1021/cr9001319
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Abstract

Literature results summarized in this review show that there are two main strategies for anodic oxidation of organic compounds. The first is to perform electrolysis at a high anodic potential in the region of water discharge, with the participation of intermediates of electrogenerated hydroxyl radicals. The nature of electrode material strongly affects both process selectivity and efficiency. In particular, anodes with low oxygen evolution overpotential, such as graphite, IrO2, RuO2 and Pt permit only partial oxidation of organics, while anodes with high oxygen evolution overpotential, such as SnO2, PbO2 and BDD, favour complete oxidation of organics to CO2, therefore they are ideal electrodes for wastewater treatment. Among them, BDD anodes show the highest removal rate and stability, and are thus promising anodes for industrial-scale wastewater treatment. The second strategy is to oxidize pollutants by indirect electrolysis, generating a redox reagent in situ as chemical reactant. The inorganic mediator can be a metallic redox couple, used for waste material disposal with over 15-20% organic content, or a chemical reagent (e.g. chlorine, ozone, peroxides). With indirect electrolysis there are no mass transfer limitation problems, but it either requires separation of metallic redox couples or produces secondary pollution. Although laboratory and pilot tests have been successful, industrial applications of these methods are still limited, due to relatively high energy consumption of the electrochemical methods. However, thanks to the development of new electrode materials, electrochemical oxidation could be increasingly applied in the future, due to specific advantages for certain applications over other technologies. Moreover, energy consumption could be reduced using so-called “advanced electrochemical oxidation processes”, based on the combination of anodic and cathodic electrogeneration of highly oxidizing hydroxyl radicals.

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Metadata

Authors
Panizza, M., & Cerisola, G.
Venue
Chemical Reviews
Publisher
American Chemical Society (ACS)
Published
2009-08-06
Volume
109
Issue
12
Pages
6541-6569
ISSN
  • 0009-2665 (ISSN-L)
  • 1520-6890
DOI
10.1021/cr9001319
OpenAlex
W2001700734
Cited by
2,346
References
210
FWCI
9.17
Type
journal article
Language
en
Open access
closed

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