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Humic acid in ice: Photo-enhanced conversion of nitrogen dioxide into nitrous acid

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Title: Humic acid in ice: Photo-enhanced conversion of nitrogen dioxide into nitrous acid
Authors: Bartels-Rausch, Thorsten1 thorsten.bartels-rausch@psi.ch, Brigante, Marcello2,3, Elshorbany, Yasin F.4, Ammann, Markus1, D'Anna, Barbara2,3, George, Christian2,3, Stemmler, Konrad1, Ndour, Marieme2,3, Kleffmann, Jörg4
Source: Atmospheric Environment. Dec2010, Vol. 44 Issue 40, p5443-5450. 8p.
Subjects: Humic acid, Cryosphere, Atmospheric chemistry, Nitrogen dioxide, Nitrous acid, Photochemistry, Experiments, Snow cover, Nitrogen oxides, Nitrogen oxides & the environment
Abstract: Abstract: Laboratory studies on the heterogeneous conversion of nitrogen dioxide into nitrous acid on irradiated ice films containing humic acid are described. It was found that the presence of light in the visible range of the solar spectrum significantly enhances the rate of nitrous acid release from a humic acid doped ice film. This process might contribute to observed HONO production in snow, where the NO2 is thought to originate from nitrate photolysis. Analysis of the experimental data based on the Langmuir Hinshelwood model framework allowed quantification of the observed dependencies of the nitrous acid production rate on nitrogen dioxide concentration. The observed dependencies on the humic acid concentration as well as on the irradiation intensity were used to estimate light-driven HONO fluxes for environmental snow covers. [ABSTRACT FROM AUTHOR]
Copyright of Atmospheric Environment is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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  Availability: 0
Header DbId: egs
DbLabel: Engineering Source
An: 55477443
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: Humic acid in ice: Photo-enhanced conversion of nitrogen dioxide into nitrous acid
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  Data: <searchLink fieldCode="AR" term="%22Bartels-Rausch%2C+Thorsten%22">Bartels-Rausch, Thorsten</searchLink><relatesTo>1</relatesTo><i> thorsten.bartels-rausch@psi.ch</i><br /><searchLink fieldCode="AR" term="%22Brigante%2C+Marcello%22">Brigante, Marcello</searchLink><relatesTo>2,3</relatesTo><br /><searchLink fieldCode="AR" term="%22Elshorbany%2C+Yasin+F%2E%22">Elshorbany, Yasin F.</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22Ammann%2C+Markus%22">Ammann, Markus</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22D'Anna%2C+Barbara%22">D'Anna, Barbara</searchLink><relatesTo>2,3</relatesTo><br /><searchLink fieldCode="AR" term="%22George%2C+Christian%22">George, Christian</searchLink><relatesTo>2,3</relatesTo><br /><searchLink fieldCode="AR" term="%22Stemmler%2C+Konrad%22">Stemmler, Konrad</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Ndour%2C+Marieme%22">Ndour, Marieme</searchLink><relatesTo>2,3</relatesTo><br /><searchLink fieldCode="AR" term="%22Kleffmann%2C+Jörg%22">Kleffmann, Jörg</searchLink><relatesTo>4</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Atmospheric+Environment%22">Atmospheric Environment</searchLink>. Dec2010, Vol. 44 Issue 40, p5443-5450. 8p.
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  Data: <searchLink fieldCode="DE" term="%22Humic+acid%22">Humic acid</searchLink><br /><searchLink fieldCode="DE" term="%22Cryosphere%22">Cryosphere</searchLink><br /><searchLink fieldCode="DE" term="%22Atmospheric+chemistry%22">Atmospheric chemistry</searchLink><br /><searchLink fieldCode="DE" term="%22Nitrogen+dioxide%22">Nitrogen dioxide</searchLink><br /><searchLink fieldCode="DE" term="%22Nitrous+acid%22">Nitrous acid</searchLink><br /><searchLink fieldCode="DE" term="%22Photochemistry%22">Photochemistry</searchLink><br /><searchLink fieldCode="DE" term="%22Experiments%22">Experiments</searchLink><br /><searchLink fieldCode="DE" term="%22Snow+cover%22">Snow cover</searchLink><br /><searchLink fieldCode="DE" term="%22Nitrogen+oxides%22">Nitrogen oxides</searchLink><br /><searchLink fieldCode="DE" term="%22Nitrogen+oxides+%26+the+environment%22">Nitrogen oxides & the environment</searchLink>
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  Data: Abstract: Laboratory studies on the heterogeneous conversion of nitrogen dioxide into nitrous acid on irradiated ice films containing humic acid are described. It was found that the presence of light in the visible range of the solar spectrum significantly enhances the rate of nitrous acid release from a humic acid doped ice film. This process might contribute to observed HONO production in snow, where the NO2 is thought to originate from nitrate photolysis. Analysis of the experimental data based on the Langmuir Hinshelwood model framework allowed quantification of the observed dependencies of the nitrous acid production rate on nitrogen dioxide concentration. The observed dependencies on the humic acid concentration as well as on the irradiation intensity were used to estimate light-driven HONO fluxes for environmental snow covers. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of Atmospheric Environment is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/j.atmosenv.2009.12.025
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 8
        StartPage: 5443
    Subjects:
      – SubjectFull: Humic acid
        Type: general
      – SubjectFull: Cryosphere
        Type: general
      – SubjectFull: Atmospheric chemistry
        Type: general
      – SubjectFull: Nitrogen dioxide
        Type: general
      – SubjectFull: Nitrous acid
        Type: general
      – SubjectFull: Photochemistry
        Type: general
      – SubjectFull: Experiments
        Type: general
      – SubjectFull: Snow cover
        Type: general
      – SubjectFull: Nitrogen oxides
        Type: general
      – SubjectFull: Nitrogen oxides & the environment
        Type: general
    Titles:
      – TitleFull: Humic acid in ice: Photo-enhanced conversion of nitrogen dioxide into nitrous acid
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              Text: Dec2010
              Type: published
              Y: 2010
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