1. General Model Information
Name: CemoS/Plant - chemical uptake in plants
Main medium: terrestial
Main subject: (eco)toxicology, biogeochemistry
Organization level: Organisms
Type of model: compartment model
Keywords: plant volatilization, contamination, exposure
Prof. Michael Matthies
University of Osnabrueck
Institute of Environmental Systems Research
49069 Osnabrueck, Germany
Fax : +49-541-969-2599
Dr. Stefan Trapp
Prof. Michael Matthies Email:firstname.lastname@example.org
contents of the model
The model is part of the model package CemoS, a program system for exposure concentration estimates of environmentally hazardous chemicals. CemoS/Plant calculates uptake of anthropogenic organic chemicals from soil and air into the above-ground part of plants as well as chemical losses from plant by volatilization and metabolism in a given time. Moreover, dry and wet deposition of chemicals, adsorbed to particles (e.g. aerosols), from air onto plant surfaces is estimated and particle concentration on the plant is calculated. The model is developed for a laboratory test system with constant conditions like air temperature, air humidity, chemical concentration in soil and transpiration rate. Development of plant mass is neufis/glected.
principles of the model
The concentration of a chemical in the plant as well as the concentration in the particles on the plant is governed by a first-order linear differential equation with constant coefficients. An analytical solution is implemented. Chemical distribution in soil, and between plant and atmosphere is calculated by help of partition coefficients. Volatilization from plantinto air, and chemical input from air into plant are governed by the conductivity of the leaves and the boundary air layer. Metabolism is taken into consideration by using a first-order degradation rate.
Author of Abstract: UFIS - Environmental Research Information System
II. Technical Information
Operating System(s): MS-DOS Type of computer: PC RAM required: about 150K Disc space: 1MB List of files: CEMOS.EXE executeable program CEMOS.OVR STDSUB.DAB substance data EGAVGA.BGI graphic file CEMOS.HLP help file CEMOS.RES string file
Programming Language(s): Borland Pascal 7.0
Manual: Trapp, St. ; Matthies, M.: Dynamik von Schadstoffen - Umweltmodellierung mit Cemos, Springer, Berlin (1996). ISBN 3-540-59312-8. Complete model documentation: Trapp, St. ; Matthies, M.: Dynamik von Schadstoffen - Umweltmodellierung mit Cemos, Springer, Berlin (1996). ISBN 3-540-59312-8.
III. Mathematical Information
This is a list of model equations sorted by their characteristics with hypertext links for more details.
This is a list of model quantities sorted by their characteristics with hypertext links for more details.
Briggs, G.G., Bromilow, R.H., Evans, A.A., 1982.Relationships Between Lipophilicity and Root Uptake and Translocation of Non-ionisedChemicals by Barley.
Pestic. Sci. 13, 495-504.
Briggs, G.G., Bromilow, R.H., Evans, A.A., Williams, M., 1983. Relationships Between Lipophilicity and the Distribution of Non-ionised Chemicals in Barley Shoots Following Uptake by the Roots. Pestic. Sci. 14: 492-500.
Junge, C.E., 1977. Basic Considerations About Trace Constituents in the Atmosphere as related to the Fate of GlobalPollutants. In: Fate of Pollutants in the Air and W, Suffet, I.H. (editors), Wiley, New York 1977, pp. 7-26.
Karickhoff, S.W. 1981. Semi-Empirical Estimation of Sorption of Hydrophobic Pollutants on Natural Sediments and Soils. Chemosphere 10, Pergamon, Oxford, UK. pp. 833-846.
Riederer, M., 1990. Estimating Partitioning and Transport of Organic Chemicals in the Foliage/Atmosphere System: Discussion of a Fugacity-based model. Environ. Sci. Technol. 24: 829-837.
Schonherr, J., Riederer, M., 1989. Foliar Penetration and Accumulation of Organic Chemicals in Plant Cuticles. Springer-Verlag, New York. pp. 1-70.
Thompson, N., 1983. Diffusion and Uptake of Chemical Vapour Volatilising from a Sprayed Target Area. Pestic. Sci. 14: 33-39.
Trapp, S.; McFarlane, C.; Matthies, M. 1994. Model for Uptake of Xenobiotics into Plants: Validation with Bromacil Experiments. Environmental Toxicology and Chemistry 13, 3: 413-422.
Projektgruppe Exposmod. 1995. CemoS Handbuch.(in german)
Trapp S., Matthies M., (1996): Dynamik von Schadstoffen - Umweltmodellierung mit CemoS.
Springer Verlag. ISBN 3-540-59-312-8.
Trapp, S., Pussemier, L., 1991. Model calculations and measurements of uptake and translocation of carbamates by bean plants
Chemosphere 22, 327-339.
V. Further information in the World-Wide-Web
VI. Additional remarks
Last review of this document by: R.Patzak : 1.October 1997 -
Status of the document:
last modified by
Tobias Gabele Wed Aug 21 21:44:40 CEST 2002