Dynamic Modelling of the Fate of DDT in Lake Maggiore: Preliminary Results
Release of chemical substances significantly impacts European waters. Impacts are both direct and indirect, through degradation products, acute and/or chronic toxicity, and/or long-term effects via bioaccumulation in aquatic food chains. As the number of substances is large and measures to reduce emission are costly and time demanding, there is a necessary prioritisation of the efforts through risk assessment studies requiring exposure data, which are both scarce and difficult to obtain. This is complicated by the fact that contaminants may reach the aquatic environment and hence biota and sediments, through several routes ranging from atmospheric deposition (airshed), diffuse and/or point sources in the watershed. Furthermore, a contaminant may arrive constantly during the year or in a pulse due to an accidental release or periodically driven by environmental fluctuations. For these reasons, as a first step, we have developed a model to simulate the fate of DDT family, i.e. pp’DDT, pp’DDD, pp’DDE, op’DDT, op’DDD, op’DDE, in Lake Maggiore. The model is 0D and consists on a dynamic mass balance that includes a time-variable chemical transport and fate model for calculating DDT concentrations in the water column as well as and in sediments
DUERI Sibylle;
ZALDIVAR COMENGES Jose';
OLIVELLA Angels;
2006-01-30
JRC32115
EUR 21663 EN,
https://publications.jrc.ec.europa.eu/repository/handle/JRC32115,
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