Assessment of Photodegradation of Chemicals in the Atmosphere. Test Methods and Predictive Approaches

  • Maria Livia Tosato
  • Sergio Clementi
Part of the NATO ASI Series book series (ASIC, volume 237)


In this paper, processes of photodegradation that are considered most efficient in the breakdown of chemical pollutants in the troposphere, and the principles of the experimental methods for measuring the respective rate constants are briefly reviewed. The issue of predictive approaches that might be used for preliminary qualitative assessment of rate constants is then addressed. Performance and limitations of recently proposed estimation methods are examined; in particular, calculation methods based on the assumption that rate constants may be computed as sums of “rate constants” of the component fragments are discussed. As a possible alternative to “additivity” models, the basic concepts, conditions, and methods whereby developing “analogy” models of chemical reactivity, as a whole-molecule property, are introduced, and the applicability of the approach is examined with reference to photo-oxidation processes.


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Copyright information

© Springer Science+Business Media Dordrecht 1988

Authors and Affiliations

  • Maria Livia Tosato
    • 1
  • Sergio Clementi
    • 2
  1. 1.Department of Comparative Toxicology and EcotoxicologyIstituto Superiore di SanitàRomaItaly
  2. 2.Department of Organic ChemistryUniversity of PerugiaPerugiaItaly

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