Fate of organic nitrogen during electrooxidation over conductive metal oxide anodes

Simona Di Giulio; Carlos Carlesi Jara; Debora Fino; Guido Saracco; Vito Specchia; Paolo Spinelli

doi:10.1021/ie061693g

Fate of organic nitrogen during electrooxidation over conductive metal oxide anodes

Simona Di Giulio, Carlos Carlesi Jara, Debora Fino, Guido Saracco, Vito Specchia, Paolo Spinelli

Research output: Contribution to journal › Article › peer-review

14 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 language	English
Pages (from-to)	6783-6787
Number of pages	5
Journal	Industrial and Engineering Chemistry Research
Volume	46
Issue number	21
DOIs	https://doi.org/10.1021/ie061693g
State	Published - 10 Oct 2007
Externally published	Yes

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title = "Fate of organic nitrogen during electrooxidation over conductive metal oxide anodes",

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.",

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T1 - Fate of organic nitrogen during electrooxidation over conductive metal oxide anodes

AU - Di Giulio, Simona

AU - Jara, Carlos Carlesi

AU - Fino, Debora

AU - Saracco, Guido

AU - Specchia, Vito

AU - Spinelli, Paolo

PY - 2007/10/10

Y1 - 2007/10/10

N2 - 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.

AB - 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.

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JF - Industrial and Engineering Chemistry Research

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ER -

Fate of organic nitrogen during electrooxidation over conductive metal oxide anodes

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