Fate of organic nitrogen during electrooxidation over conductive metal oxide anodes

Simona Di Giulio, CARLOS JAVIER CARLESI JARA, Debora Fino, Guido Saracco, Vito Specchia, Paolo Spinelli

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

The electrooxidation of nitrogen-containing molecules (urea, reactive dye blue 4, acetonitrile, formamide, guanidine, and pyridazine) over Pt-Ti and Ti/RuO2 anodes is investigated. The product distribution of the electrochemical mineralization of nitrogen is monitored. Nitrogen mineralization generally leads to inorganic pollutants (NH3/NH4 + and/or nitrite and nitrate ions). Amidic and aminic compounds were found to react according to both homogeneous (acid hydrolysis) and heterogeneous (direct electrooxidation) pathways, with a rate depending on the original state of oxidation of nitrogen. Heterocyclic and multiple-bond carbonnitrogen molecules were converted but with negligible mineralization of nitrogen due to the stability of their first oxidation intermediates. The obtained results can be useful for the design of further treatment routes after electrooxidation or the definition of simultaneous strategies for inorganic pollutants elimination.

Original languageEnglish
Pages (from-to)6783-6787
Number of pages5
JournalIndustrial and Engineering Chemistry Research
Volume46
Issue number21
DOIs
StatePublished - 10 Oct 2007

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