Use of the Dynamic Technique DGT to Determine the Labile Pool Size and Kinetic Resupply of Pesticides in Soils and Sediments

The diffusive gradients in thin films (DGT) technique has been successfully and widely applied to investigate the labile fractions of inorganic contaminants soils sediments, but there have almost no applications organic contaminants. Here we developed tested approach for pesticide Atrazine (ATR) a controlled soil experiment situ an intact lake sediment core. study explored relationships between solution, DGT measured ATR solvent extractable dosed different matter, pH status incubation times. results are further interpreted using DIFS (DGT-induced fluxes sediments) model. Resupply solution was partially sustained by solid phase all soils. This due small pool size slow kinetics, with being important controlling factor. used probe examine distribution through core on subcm scale. It demonstrated-for first time-an easy use effects redox resupply kinetics biogeochemical processes trace sediments.