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
Main application:
Keywords: partitioning, steady state, exposure,deposition, chemical transfer


Dr. Stefan Trapp
University of Osnabrueck
Institute of Environmental Systems Research
Artilleriestr 34
49069 Osnabrueck, Germany
Phone: +49-541-9692574
Fax : +49-541-969-2599


Guido Baumgartner
Bernhard Reiter
Sven Scheil
Stefan Schwartz
Jan-Oliver Wagner
Dr. Stefan Trapp
Prof. Michael Matthies Email:cemos@skylla.mathematik.uni-osnabrueck.de


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

II.1 Executables:

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

II.2 Source-code:

Programming Language(s): Borland Pascal 7.0

II.3 Manuals:

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.

II.4 Data:

III. Mathematical Information

III.1 Mathematics

This is a list of model equations sorted by their characteristics with hypertext links for more details.

III.2 Quantities

This is a list of model quantities sorted by their characteristics with hypertext links for more details.

III.2.1 Input

III.2.2 Output

IV. References

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

Additional information
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

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