You are here:
MODELLIERUNG UND SIMULATION DES VERHALTENS VON UMWELTCHEMIKALIEN IN BODEN UND PFLANZEN
Citation:
Matties, M., H. Behrerdt, S. Trapp, AND C. McFarlane. MODELLIERUNG UND SIMULATION DES VERHALTENS VON UMWELTCHEMIKALIEN IN BODEN UND PFLANZEN. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/A-92/015.
Description:
The transport and transformation of organic chemicals in soil and plant can be assessed by a combination of laboratory and field studies with mathematical modelling taking into consideration the physical, chemical and biological processes. Simultaneous transport and transformation of herbicides (glufosinate, 2.4.5-T) in soil lysimeters and in the field can be predicted by steady-state or transient water and chemical transport models. he non-linear mineralization kinetics of metabolized organic chemicals (DEHP) depend on the concentration and the soil properties. Chemical sorption to roots can be predicted on the basis of correlation to the partitioning in n-octanol and water. ptake and distribution of chemicals in plants is determined by a combination of partitioning, water flux and reflection at the endodermis. he results of the new plant uptake model show: hydrophilic and moderate lipophilic substances are uptaken into and translocated within plants. ery hydrophobic chemicals enter only roots. olatile substances vaporize from soil and foliage surfaces. The variability of the environmental processes and the heterogeneity of the soil structure enhance the uncertainty of model predictions under field conditions.