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Photosensitized reduction of nitrogen dioxide on humic acid as a source of nitrous acid

Author

Listed:
  • Konrad Stemmler

    (Laboratory of Radio- and Environmental Chemistry)

  • Markus Ammann

    (Laboratory of Radio- and Environmental Chemistry)

  • Chantal Donders

    (Laboratory of Radio- and Environmental Chemistry
    University of Bern)

  • Jörg Kleffmann

    (Bergische Universität Wuppertal, Physikalische Chemie/FB C)

  • Christian George

    (Laboratoire d'Application de la Chimie à l'Environnement (UCBL-CNRS))

Abstract

Nitrous acid: the day job Nitrous acid is a major photochemical precursor of the hydroxyl radical, a key oxidant in the degradation of air pollutants in the lower atmosphere. The gas is known to accumulate in the lower troposphere at night, but the recent discovery of enhanced concentrations of nitrous acid measured at various sites both urban and rural during daytime was a surprise. Now the light-induced reaction between soil humic acid and nitrogen dioxide has been put forward as an explanation. The observed reaction rate of nitrous acid formation suggests that this production mechanism could be an important factor in the chemistry of the lower troposphere

Suggested Citation

  • Konrad Stemmler & Markus Ammann & Chantal Donders & Jörg Kleffmann & Christian George, 2006. "Photosensitized reduction of nitrogen dioxide on humic acid as a source of nitrous acid," Nature, Nature, vol. 440(7081), pages 195-198, March.
    • Handle: RePEc:nat:nature:v:440:y:2006:i:7081:d:10.1038_nature04603
    DOI: 10.1038/nature04603
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    Cited by:

    1. Chunxiang Ye & Xianliang Zhou & Yingjie Zhang & Youfeng Wang & Jianshu Wang & Chong Zhang & Robert Woodward-Massey & Christopher Cantrell & Roy L. Mauldin & Teresa Campos & Rebecca S. Hornbrook & John, 2023. "Synthesizing evidence for the external cycling of NOx in high- to low-NOx atmospheres," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
    2. Giovanni Pugliese & Johannes Ingrisch & Laura K. Meredith & Eva Y. Pfannerstill & Thomas Klüpfel & Kathiravan Meeran & Joseph Byron & Gemma Purser & Juliana Gil-Loaiza & Joost Haren & Katerina Dontsov, 2023. "Effects of drought and recovery on soil volatile organic compound fluxes in an experimental rainforest," Nature Communications, Nature, vol. 14(1), pages 1-13, December.

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