4-2_2. distribution of pa hs in the environment, marija okuka
TRANSCRIPT
Distribution of PAHs in the environment
M. S. Okuka, N. V. Šenk
May 2012. Sofia
Department of Environmental Engineering and Occupational Safety Faculty of Technical Sciences
University of Novi Sad
PAHs-Polycyclic Aromatic Hydrocarbons
• Organic pollutants
• Origin
• Toxicity
PAHs-Polycyclic Aromatic Hydrocarbons
• Sorption processes
• Dry and wet deposition
• Air/ Soil /Water
Structure
SPARC (Sparc Performs Automated Reasoning in Chemistry)
Using the molecular structure model gas/particle partitioning coefficient (Kp) is calculated using the formula:
wiomwiom KfKp
wiomK- sorption coefficient calculated with SPARC softvare (ciWIOM/ciair)
wiomf - mass fraction of water insoluble organic matter (wiom) in aerosol (recomended value 40%)
SPARC (Sparc Performs Automated Reasoning in Chemistry)
The model was validated for three types of WIOM polymers
Secondary organic aerosol polymers used in calculations as organic matter surrogate
Locations in Novi Sad
N1-NIS refinery, N2-Sangaj kindergarden, N3-City's Assembly
Comparison of log Kp values-measured and modelled
3 3.5 4 4.5 5 5.5 63
3.5
4
4.5
5
5.5
6
B(ghi)P
N1N2N3Line 1:1
Conclusion
Predictions for PAHs with carcinogenic, mutagenic and teratogenic properties are close to linear relationship, which means that SPARC model can be used for prediction of partitioning and distribution processes.
The study of partition processes heterogenic system
• air/water• air/soil • water/soil
are in progress.
THANK YOU FOR YOUR ATTENTION!!!
БЛАГОДАРЯ ВИ ЗА ВНИМАНИЕТО!!!