Photodegradation of halobenzenes in water ice

  • Petr Klán
  • David Del Favero
  • Alena Ansorgová
  • Jana Klánová
  • Ivan Holoubek
Research Articles


Results from the photolysis ofo, p-dichlorobenzene, bromobenzene, andp-dibromobenzene in water ice are reported. All phototransformations appeared to be based on dehalogenation, coupling, and rearrangement reactions in ice cavities. No photosolvolysis products, i.e. products from intermolecular reactions between organic and water molecules, were found. Many of the products were very toxic substances of a high environmental risk, such as PCBs. The results support our model, in which secondary, very toxic, pollutants can be formed in ice, snow, and atmospheric ice particles from primary pollutants through the action of solar irradiation. The photoproducts may be released to the environment by ice melting and evaporation.


Long-range transport photochemistry photodegradation ice snow water chlorobenzenes bromobenzenes persistent organic pollutants (POPs) polychlorobiphenyls (PCB) POPs 


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Copyright information

© Ecomed Publishers 2001

Authors and Affiliations

  • Petr Klán
    • 1
  • David Del Favero
    • 2
  • Alena Ansorgová
    • 2
  • Jana Klánová
    • 2
  • Ivan Holoubek
    • 2
  1. 1.Department of Organic Chemistry, Faculty of ScienceMasaryk UniversityBrnoCzech Republic
  2. 2.RECETOX-TOCOEN & AssociatesBrnoCzech Republic

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