1. General Model Information
Name: CemoS/Level2 - concentration of chemical in compartment
Main medium: all
Main subject: (eco)toxicological, biogeochemistry
Organization level: Ecosphere
Type of model: compartment model
Keywords: partitioning, steady state, exposure,deposition, chemical transfer
Dr. Stefan Trapp
University of Osnabrueck
Institute of Environmental Systems Research
49069 Osnabrueck, Germany
Fax : +49-541-969-2599
Dr. Stefan Trapp
Prof. Michael Matthies Email:email@example.com
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/Level2 is implemented after the fugacity concept by Mackay, but instead of fugacities partition coefficients are used. The model calculates the concentration of a chemical in any number of the compartments 'water', 'soil', 'air', 'sediment', 'suspension', 'fish' and 'plant' after a given time, as well as steady state concentrations in these compartments. All compartments are regarded as homogeneously intermixed.
principles of the model
The initial concentration of the chemical in one reference medium (e.g. water) is calculated by using level1 model. Concentration at time $t$ in this compartment is governed by a linear first-order differential equation. An analytical solution is used. Partition coefficients between the reference medium and the other media are calculated. From this and from the volumes of the compartments, the concentration and the mass of the chemical in the other compartments are calculated.
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 executable program CEMOS.OVR STDSUB.DAB substance data EGAVGA.BGI graphic file CEMOS.HELP 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.
Projektgruppe Exposmod. 1995. CemoS Handbuch.(in german)
Isnard, P., Lamber, S., 1988. Estimating Bioconcentration Factors from Octanol-Water Partition Coefficients and Aqueous Solubility. Chemosphere 17(1): 21-34.
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.
Mackay, D., 1980. The Fugacity approach. Multimedia Environmental Models. Lewis Pub., Michigan. pp. 83 ff.
Trapp, S., 1995. Model for Uptake of Xenobiotics into plantsIn :Plant Contamination - Modelling and, Trapp, S.; Mc Farlane, C. (editors), Lewis Pub., Boca Raton, FL.
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.
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