Predicting release and transport of pesticides from a granular formulation during unsaturated diffusion in porous media
| Autor: | Eva Pose-Juan, Paula Pérez-Rodríguez, J. Eugenio López-Periago, Marcos Paradelo, Diego Soto-Gómez |
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| Rok vydání: | 2014 |
| Předmět: |
Pollution
Diffusion equation media_common.quotation_subject formulation soil pesticide transport soil Water Purification Water Movements Environmental Chemistry Pesticides Diffusion (business) Solubility CRFS Groundwater Water Science and Technology media_common Chemistry diffusion Environmental engineering virus diseases Controlled release controlled release Agrochemicals Porous medium Biological system Filtration agrochemicals |
| Zdroj: | Paradelo Pérez, M, Soto-Gómez, D, Pérez-Rodrígez, P, Pose-Juan, E & López-Periago, J E 2014, ' Predicting release and transport of pesticides from a granular formulation during unsaturated diffusion in porous media ', Journal of Contaminant Hydrology, vol. 158, pp. 14-22 . https://doi.org/10.1016/j.jconhyd.2013.10.009 |
| ISSN: | 0169-7722 |
| Popis: | The release and transport of active ingredients (AIs) from controlled-release formulations (CRFs) have potential to reduce groundwater pesticide pollution. These formulations have a major effect on the release rate and subsequent transport to groundwater. Therefore the influence of CRFs should be included in modeling non-point source pollution by pesticides. We propose a simplified approach that uses a phase transition equation coupled to the diffusion equation that describes the release rate of AIs from commercial CRFs in porous media; the parameters are as follows: a release coefficient, the solubility of the AI, anddiffusion transport with decay. The model gives acceptable predictions of the pesticides release from commercial CRFs in diffusion cells filled with quartz sand. This approach can be used to study the dynamics of the CRF-porous media interaction. It also could be implemented in fate of agricultural chemical models to include the effect of CRFs. |
| Databáze: | OpenAIRE |
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