Objectif To elucidate the role of natural organic colloidal matter on the transport of pesticides through soil.The project consists of laboratory and field lysimeter studies.1. In the laboratory the colloid facilitated leaching of four pesticides will be investigated in soil columns. Likewise the dissolved organic carbon in soil solution will be analysed in relation to macrochemical soil properties. Conditional association constants for pesticide binding to the bulk soil will be measured, in comparison to the adsorption of pesticides to selected dispersible colloidal fractions. This work will be supplemented by spectroscopic analyses in order to detect specific binding interactions between pesticides and dispersed colloidal fractions.2. On two field lysimeter sites, pesticide movement will be measured as affected by manuring treatments. Water movement and soil solution composition will be monitored. In selected samples, the dissolved organic carbon will be further characterized by advanced spectroscopic (infrared, electronic spin resonance, and fluorescence) and physical-chemical techniques e.g. differential thermogravimetric analysis.3. Parameters obtained in the laboratory study will be used in solute transport models, together with the macrochemistry and flow data from the lysimeter studies, to model the colloid content in the soil solution and the pesticide movement, both in solution and adsorbed on organic colloids. Champ scientifique natural sciencesphysical sciencescondensed matter physicssoft matter physics Programme(s) FP3-ENV 1C - Specific research and technological development programme (EEC) in the field of the environment, 1990-1994 Thème(s) 040201 - Risks from agricultural technologies and land use practices to soil, surface and groundwater quality Appel à propositions Data not available Régime de financement CSC - Cost-sharing contracts Coordinateur Dienst Landbouwkundig Onderzoek Contribution de l’UE Aucune donnée Adresse 92,Oosterweg 9750 RA Haren Pays-Bas Voir sur la carte Coût total Aucune donnée Participants (3) Trier par ordre alphabétique Trier par contribution de l’UE Tout développer Tout réduire ROTHAMSTED RESEARCH LIMITED Royaume-Uni Contribution de l’UE Aucune donnée Adresse West Common AL5 2JQ Harpenden, Herts Voir sur la carte Coût total Aucune donnée UNIVERSIDADE NOVA DE LISBOA Portugal Contribution de l’UE Aucune donnée Adresse Quinta da Torre 2825 MONTE DA CAPARICA Voir sur la carte Coût total Aucune donnée Università degli Studi di Bari Italie Contribution de l’UE Aucune donnée Adresse Via Amendola 165/A 70126 Bari Voir sur la carte Coût total Aucune donnée