Session 3.1.3

New insights in occurrence and reactivity of pollutants in environmental compartments


Reactivity, transformation products, secondary aerosol, oxidation, water quality, air quality



  • KN: Marja Liisa RIEKKOLA (Helsinki University, FI)

  • IL1: Wahid MELLOUKI (ICARE, CNRS Orléans, FR)

  • IL2: Davide VIONE (UNITO, Torino, IT)


Understanding the fate of pollutants in water or in air compartments is essential especially when they are not stable. This is the case for the majority of organic compounds whose interactions with their environment are still not well understood, particularly their mechanisms of formation, transformation and transfer at all scales, spatial and temporal. It is therefore important to develop works studying their occurrence but also their transfer, dispersion and transformation. For example, with regard to the aquatic compartment, the oxidation and photo-oxidation processes are important to elucidate as they condition the presence of these compounds and of their transformation products. Homogeneous and heterogeneous phase reactivity studies of the major classes of atmospheric pollutants are also essential and make it possible, in particular, to propose new relations of structure-reactivity type and thus to improve the quality of models of atmospheric chemistry; this in the interest of a better understanding of air quality, or a better knowledge of the impacts on climate change (aging organic aerosol). The study of new formation tracers of secondary organic aerosols, directly related to the evolution of future legislation on air quality and climate, requires a better knowledge of the sources of pollutants, and also a better understanding of the reactivity of various compounds, of the fate of their oxidation products and also of their role in the formation of secondary aerosols. This session intends to present recent developments in water and in air quality assessment.