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Head of the Laboratory

Prof. Stefan Tsakovski, Ph.D

Phone: +3592-8161426;

E-mail: STsakovski@chem.uni-sofia.bg


Laboratory Members (Including students and Ph.D students)

Prof. Vasil Simeonov, DSc.


Head Assist. Prof. Galina Yotova, Ph.D



Research Topics

  • Chemometrics and Environmetrics
  • Environmental analytical chemistry
  • Environmental History

Project Activity – (Research Projects in the last 5 years)

  • National Science Program "Environmental Protection and Reduction of Risks of Adverse Events and Natural Disasters", Ministry of Education and Science of Bulgaria, 2018 –
  • Environmental impact assessment of waste water treatment plants on receiving water bodies, National Science Fund of Bulgaria, 2017 –
  • Statistical assessment of the risk of concomitant diseases of type 2 diabetes mellitus, National Science Fund of Bulgaria, 2018 –
  • Statistical modeling of environmental and human risk caused by heavy metal polluted soils, National Science Fund of Bulgaria, 2014 – 2018

Research Cooperation

  • Institute of Environmental Assessment and Water Research, Barcelona, Spain
  • Gdansk University of Technology, Gdansk, Poland
  • Friedrich-Schiller University of Jena, Jena, Germany
  • Babeş-Bolyai University, Cluj-Napoca, Romania
  • University of Trieste, Trieste, Italy
  • Pomeranian University in Slupsk, Slupsk, Poland
  • Aristotle University of Thessaloniki, Thessaloniki, Greece

Publications from the last 5 years

  1. Yotova, G., Varbanov, M. Tcherkezova, E. & Tsakovski, S. Water quality assessment of a river catchment by the composite water quality index and self-organizing maps. Ecological Indicators, 120, 2021, 106872
  2. Yotova, G., Venelinov, T. & Tsakovski, S. Chemometric Assessment of Bulgarian Wastewater Treatment Plants' Effluents. Molecules, 25,(19), 2020, 4408.
  3. Galina Yotova, Svetlana Lazarova, Błażej Kudłak, Boika Zlateva, Veronika Mihaylova, Monika Wieczerzak, Tony Venelinov, Stefan Tsakovski. Assessment of the Bulgarian Wastewater Treatment Plants’ Impact on the Receiving Water Bodies. Molecules, 24 (12), 2019, 2274.
  4. Błażej Kudłak, Natalia Jatkowska, Paweł Kubica, Galina Yotova, Stefan Tsakovski. Influence of storage time and temperature on the toxicity, endocrine potential, and migration of epoxy resin precursors in extracts of food packaging materials. Molecules, 24 (23), 2019, 4396.
  5. Nedyalkova, M.A., Madurga, S., Tobiszewski, M., Simeonov, V. Calculating the Partition Coefficients of Organic Solvents in Octanol/Water and Octanol/Air. Journal of Chemical Information and Modeling, 59, 2019, 2257–2263.
  6. Natalia Szczepańska, Mariusz Marć, Błażej Kudłak, Vasil Simeonov, Stefan Tsakovski, Jacek Namiesnik. Assessment of ecotoxicity and total volatile organic compound (TVOC) emissions from food and children's toy products. Ecotox. Environ. Safe., 160, 2018, 282-289.
  7. Galina Yotova, Monika Padareva, Mariana Hristova, Aleksander Astel, Milena Georgieva, Nikolai Dinev, Stefan Tsakovski. Establishment of geochemical background and threshold values for 8 potential toxic elements in the Bulgarian soil quality monitoring network. Sci. Total Environ., 643, 2018, 1297-1303.
  8. Monika Wieczerzak, Błażej Kudłak, Galina Yotova, Stefan Tsakovski, Vasil Simeonov, Jacek Namieśnik. Impact of inorganic ions and pH variations on toxicity and endocrine potential of selected environmentally relevant pharmaceuticals. Environ. Pollut., 237, 2018, 549-558.
  9. Natalia Szczepańska, Błażej Kudłak, Stefan Tsakovski, Galina Yotova, Miroslava Nedyalkova, Vasil Simeonov, Anna Dołęga, Jacek Namieśnik. Modeling and MANOVA studies on toxicity and endocrine potential of packaging materials exposed to different extraction schemes. Environ. Res., 165, 2018, 294-305.
  10. Nina Nikolova, Silviya Lavrova-Popova, Plamena Petkova, Stefan Tsakovski, Petra Příbylová. Passive air sampling monitoring of POPs in southeastern europe at high mountain station BEO - Moussala, Bulgaria. J. Chem. Technol. Metall., 53 (2), 2018, 267-274.
  11. Galina Yotova, Boika Zlateva, Sonya Ganeva, Vasil Simeonov, Błażej Kudłak, Jacek Namieśnik, Stefan Tsakovski. Phytoavailability of potentially toxic elements from industrially contaminated soils to wild grass. Ecotox. Environ. Safe., 164, 2018, 317-324.
  12. R. Jedkiewicz, S. Tsakovski, A. Lavenu, J. Namiesnik, M. Tobiszewski. Simultaneous grouping and ranking with combination of SOM and TOPSIS for selection of preferable analytical procedure for furan determination in food. Talanta, 178, 2018, 928-933.
  13. Ts. Voyslavov, S. Tsakovski, V. Simeonov, S. Arpadjan. The effect of iron and manganese oxyhydroxide soil fraction on the occurence of Cr(VI). Bulg. Chem. Commun., 50 (3), 2018, 417-422.
  14. Tanya Monova, Oleg Konstantinov, Sylvia Kalenderova, Stefan Tsakovski, Ganka Kossekova. Design and implementation of virtual models in medical biochemistry learning. AIP Conference Proceedings 2048, Publisher:American Institute of Physics, 2018, 20033.
  15. N. Szczepańska, B. Kudłak, G. Yotova, S. Tsakovski, J. Namieśnik. Assessing Acute Toxicity of Selected Packages Internal Layers Extracts using Microtox®. Packag. Technol. Sci., 30 (7), 2017, 347-357.
  16. M. Blas, Z. Polokowska, V. Simeonov, S. Tsakovski, M. Sobik, K. Kozak, J. Namiesnik. Application of Chemometric Analysis to the Study of Snow at the Sudety Mountains, Poland. Ecol. Chem. Eng. S., 23 (4), 2016, 621-637.
  17. K. Kozak, Z. Polkowska, L. Stachnik, B. Luks, S. Chmiel, M. Ruman, D. Lech, K. Koziol, S. Tsakovski, V. Simeonov. Arctic catchment as a sensitive indicator of the environmental changes: distribution and migration of metals (Svalbard). Int. J. Environ. Sci. Te., 13 (12), 2016, 2779-2796.
  18. A. Astel, K. Astel, S. Tsakovski, M. Biziuk, K. Obolewski, K. Glinska-Lewczuk, I. Craciun, CM Timofte. Comprehensive comparison of a few variants of cluster analysis as data mining tool in supporting environmental management. Environ. Eng. Manag. J., 15 (6), 2016, 1173-1185.
  19. Tsvetomil Voyslavov, Stefan Tsakovski, Sonya Ganeva. Determination of hexavalent chromium in aqueous and alkaline soil extracts. Turk. J. Chem., 40, 2016, 944-952.
  20. B. Kudłak, M. Wieczerzak, G. Yotova, S. Tsakovski, V. Simeonov, J. Namiesnik. Environmental risk assessment of Polish wastewater treatment plant activity. Chemosphere, 160, 2016, 181-188.
  21. P. Bigus, S. Tsakovski, V. Simeonov, J. Namisnik, M. Tobiszewski. Hasse diagram as a green analytical metrics tool: ranking of methods for benzo[a]pyrene determination in sediment. Anal. Bioanal. Chem., 408 (14), 2016, 3833-3841.
  22. Monika Wieczerzak, Błażej Kudłak, Galina Yotova, Miroslava Nedyalkova, Stefan Tsakovski, Vasil Simeonov, Jacek Namieśnik. Modeling of pharmaceuticals mixtures toxicity with deviation ratio and best-fit functions models. Sci. Total Environ., 571, 2016, 259-268.
  23. G. Yotova, R. Tsitouridou, S. Tsakovski, V. Simeonov. Urban air quality assessment using monitoring data of fractionized aerosol samples, chemometrics and meteorological conditions. J. Environ. Sci. Health, A, 51 (7), 2016, 544-552.

Teaching Activity

Discipline Speciality
Multivariate statistical methods MSc Modern spectral and chromatographic methods for analysis

MSc Environmental Chemistry

BSc Environmental Chemistry

In-door Pollution MSc Environmental Chemistry
Environmental chemistry MSc Environmental Chemistry
Environmental History MSc Environmental Chemistry
Environmental legislation MSc Environmental Chemistry
Chemistry and society MSc Chemistry Teacher
Мultivariate modeling of environmental objects MSc Environmental Chemistry
Statistical data treatment

BSc Chemistry and Informatics

BSc Computer Chemistry

Applied statistics BSc Environmental Chemistry

BSc Chemistry

BSc Computer Chemistry

Information technology and statistics MSc Degree Pharmacy

Formers and Recent Ph.D and Research Students

Master Thesis students – 56

PhD students - 10