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Aqueous-phase photochemical formation of peroxides in authentic cloud and fog waters.

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  • المؤلفون: Faust BC;Faust BC; Anastasio C; Allen JM; Arakaki T
  • المصدر:
    Science (New York, N.Y.) [Science] 1993 Apr 02; Vol. 260 (5104), pp. 73-5.
  • نوع النشر :
    Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.; Research Support, U.S. Gov't, P.H.S.
  • اللغة:
    English
  • معلومة اضافية
    • المصدر:
      Publisher: American Association for the Advancement of Science Country of Publication: United States NLM ID: 0404511 Publication Model: Print Cited Medium: Print ISSN: 0036-8075 (Print) Linking ISSN: 00368075 NLM ISO Abbreviation: Science Subsets: MEDLINE
    • بيانات النشر:
      Publication: : Washington, DC : American Association for the Advancement of Science
      Original Publication: New York, N.Y. : [s.n.] 1880-
    • الموضوع:
      Atmosphere*; Hydrogen Peroxide/*chemistry ; Water/*chemistry; Chemical Phenomena ; Chemistry, Physical ; Free Radicals ; Oxidation-Reduction ; Photochemistry ; Sulfur Dioxide/chemistry ; Sulfuric Acids/chemistry ; Sunlight ; Ultraviolet Rays
    • نبذة مختصرة :
      Gas-to-drop partitioning of hydrogen peroxide and its precursor, the hydroperoxyl radical (HO2.), has been considered the predominant or sole source of hydrogen peroxide in atmospheric water drops. However, atmospheric water can absorb solar ultraviolet radiation, which initiates the photoformation of peroxides (primarily hydrogen peroxide). Measurements of peroxide photoformation rates in authentic atmospheric water samples demonstrate that aqueous-phase photochemical reactions are a significant, and in some cases dominant, source of hydrogen peroxide to cloud and fog drops. This additional source could significantly change the current understanding, and hence, the models, of sulfuric acid deposition because hydrogen peroxide is the limiting reagent in the dominant pathway for the oxidation of sulfur dioxide to sulfuric acid in the troposphere over eastern North America.
    • الرقم المعرف:
      0 (Free Radicals)
      0 (Sulfuric Acids)
      059QF0KO0R (Water)
      0UZA3422Q4 (Sulfur Dioxide)
      BBX060AN9V (Hydrogen Peroxide)
      O40UQP6WCF (sulfuric acid)
    • الموضوع:
      Date Created: 19930402 Date Completed: 19930430 Latest Revision: 20190618
    • الموضوع:
      20221213
    • الرقم المعرف:
      10.1126/science.8465202
    • الرقم المعرف:
      8465202