Objective 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. Fields of science 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 Topic(s) 040201 - Risks from agricultural technologies and land use practices to soil, surface and groundwater quality Call for proposal Data not available Funding Scheme CSC - Cost-sharing contracts Coordinator Dienst Landbouwkundig Onderzoek EU contribution No data Address 92,Oosterweg 9750 RA Haren Netherlands See on map Total cost No data Participants (3) Sort alphabetically Sort by EU Contribution Expand all Collapse all ROTHAMSTED RESEARCH LIMITED United Kingdom EU contribution No data Address West Common AL5 2JQ Harpenden, Herts See on map Total cost No data UNIVERSIDADE NOVA DE LISBOA Portugal EU contribution No data Address Quinta da Torre 2825 MONTE DA CAPARICA See on map Total cost No data Università degli Studi di Bari Italy EU contribution No data Address Via Amendola 165/A 70126 Bari See on map Total cost No data