Bioconcentration of gaseous organic chemicals in plant leaves : Comparison of experimental data with model predictions.
This literature study is performed to support the implementation of two models in a risk assessment system for the evaluation of chemicals and their risk for human health and the environment (Uniform System for the Evaluation of Substances [USES] 1.0).
One of the exposure pathways for humans and cattle is the uptake of chemicals by plants.
In this risk assessment system the transfer of gaseous organic substances from air to plants modeled by Riederer is included.
A similar model with a more refined approach, including dilution by growth, is proposed by Trapp and Matthies, which was implemented in the European version of this risk assessment system (EUSES).
In this study both models are evaluated by comparison with experimental data on leaf/air partition coefficients (bioconcentration factors [BCFs]) found in the literature.
For herbaceous plants both models give good estimations for the leaf/air partition coefficient up to 107, with deviations for most substances within a factor of five.
For the azalea and spruce group the fit between experimental BCF values and the calculated model values is less adequate.
For substances for which Riederer estimates a leaf/air partition coefficient above 107, the approach of Trapp and Matthies seems more adequate ; however, few data were available.
Mots-clés Pascal : Accumulation biologique, Feuille végétal, Modèle prévision, Absorption, Validation, Analyse risque, Composé organique, Impact environnement
Mots-clés Pascal anglais : Biological accumulation, Plant leaf, Forecast model, Absorption, Validation, Risk analysis, Organic compounds, Environment impact
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 98-0351638
Code Inist : 002A14D05A. Création : 27/11/1998.