ΜΕΤΑΠΤΥΧΙΑΚΕΣ ΣΠΟΥ ΕΣ Imperial College of Science and Technology, University of London, M.Sc. και Ph.D. στην Περιβαλλοντική Μηχανική.

ΘΕΜΙΣΤΟΚΛΗΣ. ΛΕΚΚΑΣ Καθηγητής ΤΗΛ: +30 22510 36277, 210 6492450 FAX: +30 210 6492499 E-MAIL: vlekkas@aegean.gr ΠΡΟΠΤΥΧΙΑΚΕΣ ΣΠΟΥ ΕΣ Πολυτεχνείο Αθηνών (Πτυχίο Χηµικού Μηχανικού). ΜΕΤΑΠΤΥΧΙΑΚΕΣ ΣΠΟΥ ΕΣ Imperial College of Science and Technology, University of London, M.Sc. και Ph.D. στην Περιβαλλοντική Μηχανική. ΕΠΑΓΓΕΛΜΑΤΙΚΟΙ ΣΥΛΛΟΓΟΙ / ΙΕΘΝΕΙΣ ΕΠΙΤΡΟΠΕΣ Εθνικός αντιπρόσωπος στην E.Ε. στην Επιτροπή για το Περιβάλλον και το Κλίµα (COPEC). Ιδρυτής του Παγκόσµιου ικτύου Περιβαλλοντικής Επιστήµης και Τεχνολογίας (Global Network of Environmental Science and Technology, G-NEST). Μέλος των: Τεχνικό Επιµελητήριο Ελλάδος, Ελληνική Ένωση Χηµικών Μηχανικών και άλλων συλλόγων. ΕΠΙΤΡΟΠΕΣ ΕΚ ΟΤΩΝ, ΕΠΙΣΤΗΜΟΝΙΚΩΝ ΚΡΙΤΩΝ Εκδότης του Επιστηµονικού Περιοδικού Global Nest: The International Journal, Scientific America, Greek edition. Κριτής σε διάφορα διεθνή επιστηµονικά περιοδικά. ΕΡΕΥΝΗΤΙΚΑ ΕΝ ΙΑΦΕΡΟΝΤΑ Υδατικοί Πόροι και ιαχείριση Νερού Ύδρευσης Παραπροϊόντα Χλωρίωσης ιήθηση Νερού Επίδραση Κροκίδωσης-Συσσωµάτωσης στη διαδικασία της ιήθησης Ανάπτυξη υναµικών Μοντέλων για Λειτουργικό Έλεγχο των Μονάδων Επεξεργασίας Υγρών Αποβλήτων Παρεµπόδιση από Τοξικά Μέταλλα στη Βιολογική Επεξεργασία Ανίχνευση και Αποµάκρυνση των PAH s κατά τη Βιολογική Επεξεργασία Αγροχηµικά στο Πόσιµο Νερό Πτητικές Οργανικές Ενώσεις (VOCs) Ολοκληρωµένα Συστήµατα Ανακύκλωσης Στερεών Αποβλήτων. ΕΡΕΥΝΗΤΙΚΕΣ ΣΥΝΕΡΓΑΣΙΕΣ Πανεπιστήµιο Αθηνών, Πολυτεχνείο Αθηνών, Αριστοτέλειο Πανεπιστήµιο Θεσσαλονίκης, ηµοκρίτειο Πανεπιστήµιο Θράκης, Imperial College U.K. ΟΙΚΟΝΟΜΙΚΗ ΥΠΟΣΤΗΡΙΞΗ ΕΡΕΥΝΑΣ Υπουργείο Περιβάλλοντος, Χωροταξίας και ηµοσίων Έργων, Εταιρεία Ύδρευσης και Αποχέτευσης Πρωτευούσης, Γενική Γραµµατεία Έρευνας και Τεχνολογίας, Ευρωπαϊκή Ένωση, Ελληνική Βιοµηχανία. ΒΙΒΛΙΑ 1. Θ. Λέκκας, Γ. Γιαννόπουλος, Γ. Ραζής, Συγκριτική Παρουσίαση Μεθόδων ιαχείρισης Αστικών Στερεών Αποβλήτων, Αθήνα, 1991.

2. Θ. Λέκκας, Περιβαλλοντική Μηχανική I. ιαχείριση Υδατικών Πόρων, Μυτιλήνη, 1996 (24 κεφάλαια). 3. Θ. Λέκκας, Περιβαλλοντική Μηχανική ΙΙ. ιαχείριση Υγρών Αποβλήτων, Μυτιλήνη, 2001 (16 κεφάλαια). 4. Saltworks: Preserving Saline Coastal Ecosystems (selection of papers), Athens, 2000. 5. Metal Speciation in the Environment (selection of papers), Athens, 2000. 6. Proceedings of the fifth International Conference in Heavy Metals in the Environment, (two volumes), Athens, Greece, 1985 Editor 7. Proceedings of the 1 st International Conference on Environmental Science and Technology, (two volumes), Mitilini,, Greece, 1989 8. Proceedings of the Conference on Chemicals (Toxicals) in the Environment, Molyvos, Greece, 1990 9. Proceedings of the 2 nd International Conference on Environmental Science and Technology, Molyvos, Greece, 1991 10. Proceedings of the 3 rd International Conference on Environmental Science and Technology, (two volumes), Molyvos, Greece, 1993 11. Proceedings of the 4 th International Conference on Environmental Science and Technology, (two volumes), Molyvos, Greece, 1995 12. Proceedings of the 5 th International Conference on Environmental Science and Technology, (two volumes), Molyvos, Greece, 1997 13. Proceedings of the 6 th International Conference on Environmental Science and Technology, (three volumes), Pythagorion, Samos, Greece, 1999 14. Proceedings of the 7 th International Conference on Environmental Science and Technology, (three Volumes), Hermoupolis, Syros, Greece, 2001 15. Proceedings of the 8 th International Conference on Environmental Science and Technology, (two Volumes plus CD-ROM), Lemnos, Greece, 2003 ΚΕΦΑΛΑΙΟ ΣΕ ΒΙΒΛΙΟ 1. Lekkas T.D. Occurrence and Regulation of Chlorination By-Products in Drinking Water, in Haloforms and Related Compounds in Drinking Water, Series: The Handbook of Environmental Chemistry, O. Hutzinger, Editor-in-Chief, Vol. 5: Water Pollution, A. Nikolaou, Editor, Springer-Verlag, Berlin, 2003 Germany (ISBN: 3-540-40421-X) ΗΜΟΣΙΕΥΣΕΙΣ ηµοσιεύσεις σε διεθνή επιστηµονικά περιοδικά 1. Lekkas T.D. and Fox G.I.J., Grain Size Distribution with Depth in Multilayer Bed Water Filters, Filtration and Separation, 401, September/October, 1977. 2. Lekkas T.D., Fox G.I.J. and McNoughton J.G., Comparison of Two and Three Layer Granular Bed Filters for Treating Reservoir Water, J.Inst. of Wat. Engrs and Sc., 239, 32, May 1977. 3. Fox G.I.J., and Lekkas T.D., New Developments in Filtration, Water Services, 460, 81, August 1977. 4. Fox G.I.J. and Lekkas T.D., Rapid Sand Filter, Water Services, 551, 81, September 1977. 5. Lekkas T.D., Willson I.R and Gunasingham K., The Polystromatic Filter in Water Filtration, Effluent and Water Treatment Journal, 571, 18, November 1978.

6. Fox G.I.J. and Lekkas T.D., Slow Sand Filters, Water Services, 118, 82, February 1978. 7. Gunasingham K., Lekkas T.D., Fox G.I.J. and Graham N.J., Predicting the Expansion of Granular Filter Beds, Filtration and Separation, 619, November/December 1979. 8. Willson I.R., Lekkas T.D. and Fox G.I.J., Orthokinetic Flocculation in Deep Bed Granular Water Filters, J. of Amer.Wat.Works Ass., 356, 72, June 1980. 9. Λέκκας Θ.., Γκέκας Α.Κ. και Ροδάκης Γ.Π., Επίπτωση στην Οικολογία της Λιµνοθάλασσας από την αποβολή των Αλµολοίπων των Αλυκών Μεσολογγίου, Τεχνικά Χρονικά. Τριµηνιαία Επιστηµονική Έκδοση ΤΕΕ Χηµ.Μηχ.-Μετ.Μηχ. 3, 1980. 10. Lekkas T.D., A Modified Filtrability Index Filtration and Separation, 215, 18, May/June 1981. 11. Lekkas T.D., Computer-Aided Design of Multilayer Granular Water Filters, Filtration and Separation, 26, 19, January/February 1982. 12. Στάµου Γ., Λέκκας Θ., Υπερδιήθηση, Τεχνικά Χρονικά. Τριµηνιαία Επιστηµονική Έκδοση ΤΕΕ Χηµ.Μηχ.-Μετ.Μηχ. 2, 1986 13. Georgakopoulos V., Lekkas T.D., Fragiskos A., How a Deep Bed Filter Behaves when Used as a Flocculator/Clarifier, Proceedings of the Filtration Society Filtration and Separation 123, March/April 1988. 14. Sakkas N.D. and Lekkas T.D., Hydrodynamic Characteristics of the solid-liquid Fluidised Bed developed during the backwash of filter media, Environmental Technology Letters 151-156, 10 (2), February 1989. 15. Paraskevas P., Kolokithas G., Lekkas T.D., A Complete Dynamic Model of Primary Sedimentation, Environmental Technology, 14, 1037-1046, 1993. 16. Abatzoglou G., Chaloulakou A., Assimakopoulos D., Lekkas T.D., Prediction of Air Pollution Episodes: Extreme Value Theory Applied in Athens, Environmental Technology, 17,4, 349-359, 1996. 17. Golfinopoulos S., Kostopoulou M., Lekkas T.D., THM formation in the high - bromide water supply of Athens, Journal of Environmetal Science and Health A31, 1, 67-81, 1996. 18. Varnavas S.P., Lekkas T.D., Factors Controlling the Geochemical and Crystallization Processes in Marine Brine Ponds, Marine Ecoresourses and Geotechnology 14, 111-141, 1996. 19. Sakkas N.D., Lekkas T.D., Detachment mechanisms in a Liquid Fluidised Bed, Environmental Technology 17, 517-524, 1996. 20. Takforidis D.K., Lekkas T.D., Paraskevas P.A., The effect of variations in the mixing energy on the performance of a water filtration plant Fresenius Environmental Bulletin, 5, 235-240, 1996. 21. Pavlogeorgatos G., Kabas G., Lekkas T.D, Variation in heavy metal removal by a conventional municipal wastewater treatment plant, Toxicological and Environmental Chemistry, 59, 23-30, 1997. 22. Lekkas T.D., Razis Y., Filis E., First results of the pilot project for packaging waste recycling in Maroussi & Vrilissia Greece, Journal of Waste Management and Research, 15, 495-506, 1997. 23. Kotrikla A., Lekkas T., Bletsa G., Toxicity of the herbicide Atrazine, two of its degradation products and the herbicide metolachlor on phototropic microorganisms, Fresenius Environmental Bulletin, 6, 502-507, 1997. 24. Haralambopoulos D.A., Haloulakos G., Lekkas T.D., An Investigation of Wind Electricity Production to Cover the Energy Needs of a Solar Evaporation Salt Plant, Renewable Energy, 11, 1, 1-13, 1997. 25. Haralambopoulos D., Pantelakis I., Paraskevas P., Lekkas T.D., Waste Treatment and Renewable Energy Potential in the Aegean Islands, Energy - The International Journal, 22, 7, 725-733, 1997. 26. Makridis V.A., Razis Y., Lekkas T.D., Secondary materials Market in Greece, Warmer Bulletin- Journal of the World Resource Foundation, 57, August 1997. 27. Μακρίδης Β., Ραζής Ι., Λέκκας Θ., Έρευνα αγοράς ευτερογενών Πλαστικών, Πλαστικά Χρονικά, τεύχος 116, 20-26, Απρίλιος 1997.

28. Παντελάκης Ι.Σ., Παρασκευάς Π.Α., Λέκκας Θ.. Ανάπτυξη Έµπειρων Συστηµάτων στη ιαδικασία Αυτοµάτου Ελέγχου της Ενεργού Ιλύος, Τεχνικά Χρονικά - Επιστηµονική Έκδοση του ΤΕΕ, V, 1-2, 1997. 29. Paraskevas P. A. and Lekkas T. D. Physicochemical Treatment of Industrial Wastewater with the Multistage Neutralization Process, Wat. Sci. Tech., 36, 2-3, 249-253, 1997. 30. Golfinopoulos S., Xilourgidis N., Kostopoulou M., Lekkas T.D., Use of a Multiple Regression Model for Predicting Trihalomethane Formation in Galatsi Treatment Plant of Athens, Water Research, 32, 9, 2821-2829, 1998. 31. Golfinopoulos S., Kostopoulou M., Lekkas T., Volatile organic compounds in the Water Supply System in Athens Greece, Water Research, 32, 6, 1811-1818, 1998. 32. Chaloulakou A., Assimakopoulos D., Lekkas T. Forecasting Daily Maximum Ozone Concentrations in Athens Basin, Evaluation, Comparison of Prediction Ability, Environmental Monitoring and assessment, 56, 97-112, 1999. 33. Kotrikla A. Gatidou G., Lekkas T. D., Toxic Effects of Altrazine, Deathyl- Altrazine, Deisopropyl- Altrazine nad Metolachlor on Chlorella fusca var- fusca, Global Nest: The International Journal, 1, 39-45, 1999. 34. Paraskevas P.A., Pantelakis I.S., Lekkas T.D., An advanced integrated expert system for wastewater treatment plant control, Knowledge- Based Systems, 12, 355-361, 1999. 35. Pavlogeorgatos G., Lekkas T.D., Georgiou V., Spachos G., Stefanoulis C., Tridimas P. (1999), Examination of mercury's effects during the process of the Activated sludge, Toxicological and Environmental chemistry, 69, 171-181, 1999. 36. Nikolaou A.D., Kostopoulou M.N., Lekkas T.D, Organic By-products of Drinking Water Chlorination: a Review, Global Nest : The International Journal, 3, 143-156, 1999. 37. Kostopoulou N.N., Golfinopoulos S.K.,, Nikolaou A.D., Xilourgidis N.K., and Lekkas T.D., Volatile organic compounds in the surface waters of Northern Greece, Chemosphere, 40, 5, 527-532, 2000. 38. Nikolaou A.D., Golfinopoulos S.K., Kostopoulou M.N. and Lekkas T.D., Decomposition of dihaloacetonitriles in water solutions and fortified drinking water samples, Chemosphere, 41, 1149-1154, 2000. 39. Vouros G.A., Pantelakis I.S., and Lekkas T.D., Knowledge representation in an activated sludge plant diagnosis system, Expert Systems, 17, 5, 226-240, 2000. 40. Thomaidis N.S., Manalis N., Viras L. and Lekkas T.D., Determination of Lead, Cadmium, Arsenic and Nickel in Atmospheric Particulate Matter by Simultaneous Multinelement Electrothermal Atomic Absorption Spectrophotometry, Journal of Environmental Analytical Chemistry, 79, 105-116, 2001. 41. Thomaidis N.S., Adams F.C., Lekkas T.D., A simple method for the speciation of organotin compounds in water samples using ethylation and GC--QFAAS, Mikrochimica Acta, 136, ¾, 137-141, 2001. 42. Nikolaou A. D., Lekkas T. D., Kostopoulou M. N., Golfinopoulos S. K., Investigation of the behavior of haloketones in water samples, Chemosphere, 44, 5, 907-912, 2001. 43. Golfinopoulos S. K., Lekkas T. D., Nikolaou A. D., Comparison of methods for determination of volatile organic compounds in water, Chemosphere, 45, 3, 275-284, 2001. 44. Kotrikla A., Lekkas T. D., The HPLC Separation of two mixtures of neutral pesticides: Effects of temperature, Gradient Steepness and Flow Rate. Journal of Liquid Chromatography and related technologies, 24, 4, 543-553, 2001. 45. Stasinakis A.S., Thomaidis N.S., Lekkas T.D., Toxicity of organotin compounds to activated sludge, Εcotoxicology and Εnvironmental Safety, 49, 275-280, 2001. 46. Nikolaou A. D., Lekkas T. D., The role of natural organic materials during formation of chlorination by-products: a review, Acta Hydrochimica et Hydrobiologica, 29, 2/3, 63-77, 2001. 47. Nikolaou A, D., Golfinopoulos S. K., Kostopoulou M. N., Lekkas T. D., Determination of haloacetic acids in water by acidic methanol esterification-gc-ecd method, Water Research, 36, 1089-1094, 2002.

48. Nikolaou A.D., Lekkas T.D., Golfinopoulos S.K., Kostopoulou M.N. Application of different analytical methods for determination of volatile chlorination by-products in drinking water, Talanta, 56, 4, 717-726, 2002. 49. Stasinakis A.S., Mamais D., Thomaidis N.S. and Lekkas T.D. Effect of chromium (VI) on bacterial kinetics of heterotrophic biomass, Water Research, 36, 13, 3341-3349, 2002. 50. Nikolaou A.D., Arhonditsis G.B., Golfinopoulos S.K. and T.D. Lekkas, Predicting the formation of Trihalomethanes and Haloacetic acids in surface waters by linear regression models, Epidemiology, 13 (4), 172, 2002. (Abstract) 51. Giokas D.L., Kim Y., Paraskevas P.A., Paleologos E.K. and Lekkas T.D., A simple empirical model for activated sludge thickening in secondary clarifiers, Water Research, 36, 13, 3245-3252, 2002. 52. Haralambopoulos D.A., Biskos G., Halvadakis C., and Lekkas T.D., Dewatering of wastewater sludge through a solar still, Renewable Energy, 26, 2, 247-256, 2002. 53. Paraskevas P.A., Giokas D.L. and Lekkas T.D., Wastewater management in coastal urban areas: the case of Greece, Water Science & Technology, 46, 8, 177-186, 2002. 54. Nikolaou A.D., Golfinopoulos S.K., Kostopoulou M.N., Kolokythas G.A., Lekkas T.D. Determination of volatile organic compounds in surface water and treated wastewater in Greece, Water Research, 36, 11, 2002, 2883-2890. 55. Nikolaou A.D., Golfinopoulos S.K. and Lekkas T.D. Formation of organic by-products during chlorination of natural waters, Journal of Environmental Monitoring, 2002, 4, 6, 2002, 910-916. 56. Stasinakis A.S., Thomaidis N.S. and Lekkas T.D., Speciation of chromium in wastewater and sludge by extraction with liquid anion exchanger Amberlite LA-2 and electrothermal atomic absorption spectrometry, Analytica Chimica Acta, 2003, 478, 119-127. 57. Stasinakis A.S., Thomaidis N.S., Mamais D., Papanikolaou E., Tsakon A., Lekkas T., Effects of chromium (VI) addition on the activated sludge process, Water Research, 2003, 37, 9, 2140-2148. 58. Stasinakis A.S., Thomaidis N.S., Mamais D., Karivali M., Lekkas T., Chromium species behaviour in the activated sludge process, Chemosphere, 2003, 52, 1059-1067. 59. Paraskevas P.A., Pantelakis I.S. and Lekkas T.D. An advanced integrated expert system for wastewater treatment plants control: an addendum, Knowledge-Based Systems, 2003, 16, 3, 173. 60. Lekkas T., Kostopoulou M., Petsas A., Vagi M., Golfinopoulos S., Stasinakis A., Thomaidis N., Pavlogeorgatos G., Kotrikla A., Gatidou G., Xylourgidis N., Kolokythas G., Makri Ch., Babos D., Lekkas D., Nikolaou A., Monitoring priority substances of Directives 76/464/EEC and 2000/60/EC in Greek water bodies, Journal of Environmental Monitoring, 2003, 5, 593 597. 61. Golfinopoulos S.K., Nikolaou A.D. and Lekkas T.D. The occurrence of disinfection byproducts in the drinking water of Athens, Greece, Environmental Science and Pollution Research 2003, 10(6), 368-372. 62. Gatidou G., Kotrikla A., Thomaidis N. and Lekkas T., Determination of two antifouling booster biocides and their degradation products in marine sediments by high performance liquid chromatography diode array detection, Analytica Chimica Acta, 2004, 505(1), 153-159. 63. Nikolaou A.D., Golfinopoulos S.K., Lekkas T.D., Kostopoulou M.N., DBP levels in chlorinated drinking water: effect of humic substances, Environmental Monitoring and Assessment, 2004, 93, 301-319. 64. Nikolaou A.D., Golfinopoulos S.K., Arhonditsis G., Kolovoyiannis V., Lekkas T.D., Modeling the formation of chlorination by-products in river waters with different quality, Chemosphere, 2004, 55(3), 409-420. 65. Chaloulakou A., Assimakopoulos D., Lekkas T. Statistical Forecast Models for Daily Maximum Ozone Concentrations in Athens Basin, Evaluation, Comparison of Prediction Ability, Fresenius Environmental Bulletin, (in press). 66. Varnavas S.P. and Lekkas T.D., Assessement of the Environmental Impact of Brine Waste on the Marine Environment, Applied Geochemistry (in press).

67. Thomaidis N.S., Manalis N., Viras L. and Lekkas T.D., Determination of Lead, Cadmium, Arsenic and Nickel in Atmospheric Particulate Matter by Simultaneous Multinelement Electrothermal Atomic Absorption Spectrophotometry, Journal of Environmental Analytical Chemistry, (in press). 68. Stasinakis A.S., Thomaidis N.S., Giannes A.S and Lekkas T.D. Effect of arsenic and mercury speciation on inhibition of respiration rate in activated sludge systems. Environ. Sci. Pollut. Res. (in press). 69. Lekkas T.D. and Nikolaou A.D., Degradation kinetics of disinfection by-products in drinking water, Environmental Engineering Science (in press). 70. Nikolaou A.D., Lekkas T.D. and Golfinopoulos S.K., Kinetics of the formation and decomposition of chlorination by-products in surface waters, Chemical Engineering Journal (in press). 71. Lekkas T.D. and Nikolaou A.D., Development of predictive models for the formation of trihalomethanes and haloacetic acids during chlorination of bromide-rich water, Water Quality Research Journal of Canada (in press). 72. Lekkas T., Kolokythas G., Nikolaou A., Kostopoulou M., Kotrikla A., Gatidou G., Thomaidis N. S., Golfinopoulos S., Makri Ch., Babos D., Vagi M., Stasinakis A., Petsas A., Lekkas D. F, Evaluation of the pollution of the surface waters of Greece from the priority compounds of List II, 76/464/EEC Directive, and other toxic compounds, Environment International, (in press). ηµοσιεύσεις σε διεθνή επιστηµονικά συνέδρια µε κριτές 1. Σακκάς Ν. και Λέκκας Θ., Ένα πρόγραµµα (Design Aid) για τη Σχεδίαση και Βελτιστοποίηση των Μονάδων Ενεργού Ιλύος, Συνέδριο Περιβαλλοντικής Επιστήµης και Τεχνολογίας, τόµος Β', σελ. 499-509, Σεπτέµβριος 1989, Μυτιλήνη. 2. Σακκάς Ν. και Λέκκας Θ., Αποµάκρυνση Αργιλικών Προσµίξεων από το Ψιλό Αλάτι µε τη µέθοδο της Ρευστοποίησης (Fluidized Bed), Συνέδριο Περιβαλλοντικής Επιστήµης και Τεχνολογίας, τόµος Β', σελ. 510-515, Μυτιλήνη, Σεπτέµβριος 1989. 3. Κοροβέσης Ν. και Λέκκας Θ., Προσοµοίωση και Βέλτιστος Αυτόµατος Έλεγχος της Λειτουργίας Αλυκών, Συνέδριο Περιβαλλοντικής Επιστήµης και Τεχνολογίας, τόµος Β', σελ. 564-572, Μυτιλήνη, Σεπτέµβριος 1989. 4. Γεωργακόπουλος Β., Λέκκας Θ. και Φραγκίσκος Α., Η Αυξητική Επίδραση της Κροκίδωσης στο Συντελεστή Φίλτρου κατά τη ιήθηση Κλίνης Πυκνών Αιωρηµάτων Μεταλλευτικής/ Μεταλλουργικής Προέλευσης, Συνέδριο Προστασία του Περιβάλλοντος στη Μεταλλευτική, στη Μεταλλουργία και στην Τεχνολογία των Υλικών, σελ. 264, Ε.Μ.Π. Τµήµα Μηχ. Μεταλλείων Μεταλλουργών, Αθήνα, εκέµβριος 1989. 5. Μολύβας Γ., Κονδύλη Α. και Λέκκας Θ., Μοντέλα ιασποράς Πετρελαιοκηλίδας - Μελέτη στον Ορµο Σαλαµίνας, Συνέδριο Προστασία του Περιβάλλοντος στη Μεταλλευτική, στη Μεταλλουργία και στην Τεχνολογία των Υλικών, σελ. 437, Ε.Μ.Π. Τµήµα Μηχ. Μεταλλείων Μεταλλουργών, Αθήνα, εκέµβριος 1989. 6. Παρασκευάς Π. και Λέκκας Θ., Ενα Πλήρες υναµικό Μοντέλο µε Επεξεργασία και Τοξικών Οργανικών Αποβλήτων, της Μεθόδου της Ενεργού Ιλύος, Συνέδριο Χηµικά - Τοξικά στο Περιβάλλον, σελ. 289-326, Τµήµα Περιβάλλοντος, Πανεπιστήµιο Αιγαίου, Μόλυβος Λέσβου, Σεπτέµβριος 1990. 7. Παρασκευάς Π. και Λέκκας Θ., υναµικό Μοντέλο Πρωτοβάθµιας Καθίζησης, Συνέδριο Χηµικά Τοξικά στο Περιβάλλον, σελ. 356-377, Τµήµα Περιβάλλοντος, Πανεπιστήµιο Αιγαίου, Μόλυβος Λέσβου, Σεπτέµβριος 1990. 8. Παρασκευάς Π., Μπαής Ε., Λέκκας Θ., Μονάδες ενεργού ιλύος µε επεξεργασία υποστρωµάτων παρεµπόδισης, 2ο Συνέδριο Περιβαλλοντικής Επιστήµης και Τεχνολογίας, σελ. 48-57, Μόλυβος Λέσβου, 1991.

9. Μακρή Χ., Λέκκας Θ., Τζουµέρκας Φ., Πειραµατικές µετρήσεις αποµάκρυνσης µικροφυκών µε διήθηση στο νερό τροφοδοσίας των εγκαταστάσεων ΕΥ ΑΠ Γαλατσίου, 2ο Συνέδριο Περιβαλλοντικής Επιστήµης και Τεχνολογίας, σελ. 160-170, Μόλυβος Λέσβου, 1991. 10. Κοροβέσης Ν., Λέκκας Θ., Παρασκευάς Π., Βέλτιστος σχεδιασµός ανοικτών ταµιευτήρων νερού, 2ο Συνέδριο Περιβαλλοντικής Επιστήµης και Τεχνολογίας, σελ. 811-815, Μόλυβος Λέσβου, 1991. 11. Πουπάκη Ε., Παρασκευάς Π., Κουµενίδης Κ., Λέκκας Θ., Τσάτσος Χ., Πειραµατική προσέγγιση ενός σύνθετου προβλήµατος βιοµηχανικών υγρών αποβλήτων, 2ο Συνέδριο Περιβαλλοντικής Επιστήµης και Τεχνολογίας, σελ. 850-861, Μόλυβος Λέσβου, 1991. 12. Paraskevas P., Kolokithas G., Pantelakis J., Lekkas T., Evaluation of wastewater primary sedimentation using dynamic models, 3rd Conference on Environmental Science and Technology, Molyvos, Lesvos, Vol. A, p. 85-95, 6-9 September 1993. 13. Sakkas N., Lekkas T., Vlachos N., Assessment of the detachment mechanisms from the surface of a liquid fluidized particle, 3rd Conference on Environmental Science and Technology, Molyvos, Lesvos, Vol. B, p. 117-128, 6-9 September 1993. 14. Golfinopoulos S., Kostopoulou M., Lekkas T., Detection of THMs in the Athens water supply, 3rd Conference on Environmental Science and Technology, Molyvos, Lesvos, Vol. B, p. 423-431, 6-9 September 1993. 15. Abatzoglou G., Chaloulakou A., Assimakopoulos D., Lekkas T., Extreme value theory applied to air pollution of Athens, 3rd Conference on Environmental Science and Technology, Molyvos, Lesvos, Vol. B, p. 597-610, 6-9 September 1993. 16. Paraskevas P., Stathelli A., Lekkas T., Quality of Βathing Waters of Greece and Comparison with the Waters of the North Aegean Region, Restoration and protection of the environment II, proceedings of an International Conference, p. 255-262, 24-26 August 1994, Patras, Greece. 17. Golfinopoulos S.K., Kostopoulou M.N., Lekkas T.D., Seasonal Variations in Trihalomethanes Levels in the Water Supply System of Athens, 6 th International Conference on Environmental Contamination, Delphi, Greece, p. 16, 10-12/10/1994. 18. Lekkas T.D., Makris C., Razis Y., Filis E., First results of the pilot project for the recycling of packaging materials in Maroussi and Vrilissia, Greece. 4th Conference on Environmental Science and Technology, Molyvos, Lesvos, Vol. A, p. 59-71, 4-7 September 1995. 19. Pavlogeorgatos G., Kabas G., Lekkas T., Determination of ten heavy metals in a conventional sewage treatment plant and estimation of their removal ability, 4th Conference on Environmental Science and Technology, Molyvos, Lesvos, Vol. A, p. 175-184, 4-7 September 1995. 20. Aivaliotis D., Mavridou A., Lekkas T., Stathopoulos G., Results from the sanitary control of drinking water in the island of Lesbos, 4th Conference on Environmental Science and Technology, Molyvos, Lesvos, Vol. A, p. 713-721, 4-7 September 1995. 21. Golfinopoulos S., Kostopoulou M., Lekkas T., THM formation in the high-bromide water supply of Athens, 4th Conference on Environmental Science and Technology, Molyvos, Lesvos, Vol. A, p. 740-753, 4-7 September 1995. 22. Kotrikla A., Bletsa G., Lekkas T., Toxicity of the herbicide Atrazine, two of its degradation products and the herbicide Metolachlor on phytoplankton, 4th Conference on Environmental Science and Technology, Molyvos, Lesvos, Vol. A, p. 764-774, 4-7 September 1995. 23. Paraskevas P., Lekkas T., Quality of bathing waters in European Mediterranean countries, MED COAST 1995, Tarragona, Spain, p. 1523-1534, 24-27 October 1995. 24. Razis Y., Koumenides C., Lekkas T.D., The Multimaterial Recovery Project in Nothern Athens. Protection and Restoration of the Environment III, Proceedings of an International Conference, p. 672, Chania, TUC, Greece, August 1996. 25. Pantelakis I.S., Paraskevas P., Lekkas T., Developing a Diagnostic Expert System for Activated Sludge Process. Protection and Restoration of the Environment III, Proceedings of an International Conference, p. 287-292, Chania, TUC, Greece, August 1996.

26. Paraskevas P.A. and Lekkas T.D., Site Selection Criteria for Municipal Wastewater Treatment Plants. Protection and Restoration of the Environment III, Proceedings of an International Conference, p. 609-615, Chania, TUC, Greece, August 1996. 27. Demetriou A., Nathanael B., Tsoukali E., Lekkas T.D., Evaluation of the Hazard of the Working Personnel in Greenhouses caused by the Application of Methyl Bromide, 5th Chemistry Conference Cyprus, pp. 131-134, University of Cyprus, 4-7 September 1996, Nicosia. 28. Demetriou A., Nathanael B., Tsoukali E., Lekkas T.D., Evaluation of the Soil Concentration of Methyl Bromide in Greenhouses, 5th Chemistry Conference Cyprus, University of Cyprus, pp. 354-356, 4-7 September 1996, Nicosia 29. ηµητρίου Α., Ναθαναήλ Β., Τσούκαλη Ε., Λέκκας Θ., Μελέτη της επιβάρυνσης του περιβάλλοντος χώρου των θερµοκηπίων από τη χρήση βρωµιούχου µεθυλίου ως υποκαπνιστικό εδάφους και εκτίµηση του κινδύνου για τους εργαζοµένους, 5 ο Συνέδριο Περιβαλλοντικής Επιστήµης και Τεχνολογίας, τόµος Α, σελ. 425-431, Μόλυβος, 1-4 Σεπτεµβρίου 1997 30. Γκολφινόπουλος Σ., Ξυλουργίδης Ν., Κωστοπούλου Μ., Λέκκας Θ., Χρήση µοντέλου πολλαπλής παλινδρόµησης για την πρόβλεψη του σχηµατισµού τριαλογονοπαραγώγων του Μεθανίου στη Μονάδα Επεξεργασίας νερού του Γαλατσίου στην Αθήνα, 5 ο Συνέδριο Περιβαλλοντικής Επιστήµης και Τεχνολογίας, τόµος Α, σελ. 546-555, Μόλυβος, 1-4 Σεπτεµβρίου 1997 31. Paraskevas P. A. and Lekkas T. D., Wastewater Treatment Strategies for the Mediterranean Coastal Areas, Proceedings of the 3rd International Conference on the Mediterranean Coastal Environment, MEDCOAST 97, Vol. Α', pp. 245-260, Qawra Malta, Nov. 11-14, 1997. 32. Pavlogeorgatos G., Lekkas T., Georgiou B., Spachos G., Stefanoulis S., Tridimas P., Savopoulou S., Estimation of Mercury s Removal Ability in an activated sludge pilot plant and examination of Mercury s effects during the process of the activated sludge, Protection and Restoration of the Environment IV, Vol. II, p. 593-600, Krikos, Halkidiki, July, 1998 33. Paraskevas P.A., Pantelakis J.S., Lekkas T.D., Disinfection of wastewater by UV radiation, Protection and Restoration of the Environment IV, Vol. II, p. 530-537, Krikos, Halkidiki, July 1998 34. Razis Y., Lekkas T.D., Panagiotakopoulos D., The recovery programme of HERRA : An economic analysis, Protection and Restoration of the Environment IV, Vol. II, p. 708-715, Krikos, Halkidiki, July 1998 35. Paraskevas P.A., Pantelakis J.S., Lekkas T.D., An advanced integrated expert system for activated process supervision, International Association of Water Quality Conference, p. 951-954, Milan, September 1998 36. Κοτρίκλα Α., Γατίδου Γ., Λέκκας Θ., ιαχωρισµός µίγµατος ζιζανιοκτόνων µε HPLC: Επίδραση της θερµοκρασίας και του ρυθµού µεταβολής της σύστασης των διαλυτών 6 ο Συνέδριο Περιβαλλοντικής Επιστήµης και Τεχνολογίας, Πυθαγόρειον, Σάµου, Τόµος A, σελ. 372-379, Σεπτέµβριος 1999. 37. Κωστοπούλου M., Γκολφινόπουλος Σ., Νικολάου Α., Ξυλουργίδης Ν., Λέκκας Θ., Η εµφάνιση των πτητικών αλογονωµένων οργανικών ενώσεων στα επιφανειακά νερά της Β. Ελλάδος, The Occurrence of Volatile Halogenated Organic Compounds in the Surface Waters of N. Greece, 6 ο Συνέδριο Περιβαλλοντικής Επιστήµης και Τεχνολογίας, Πυθαγόρειον, Σάµου, Τόµος Γ', σελ. 10-17, Σεπτέµβριος 1999. 38. Κολοκυθάς Γ., Χαραλαµπόπουλος., Παρασκευάς Π., Λέκκας Θ., Κατανάλωση Ενέργειας στη Μονάδα Επεξεργασίας Υγρών Αποβλήτων στα Νησιά του Αιγαίου και υνατότητα κάλυψης µε Αιολική Ενέργεια, 6 ο Συνέδριο Περιβαλλοντικής Επιστήµης και Τεχνολογίας, Πυθαγόρειον, Σάµου, Τόµος Γ', σελ. 161-169, Σεπτέµβριος 1999. 39. Στασινάκης Α., Μαµάης., Παρασκευάς Π.Α., Λέκκας Θ.., Αξιολόγηση µεθόδων εκτίµησης κινητικών παραµέτρων σε συστήµατα ενεργού ιλύος, 6 ο Συνέδριο Περιβαλλοντικής Επιστήµης και Τεχνολογίας, Πυθαγόρειον, Σάµου, Τόµος Γ', σελ. 191-198, Σεπτέµβριος 1999.

40. Στασινάκης Α., Θωµαϊδης Ν., Γεωργόπουλος Ν., Γιαννής Α., Γρηγορόπουλος Α., Καραντανέλλη Μ., Λέκκας Θ., Προσδιορισµός Βαριών Μετάλλων και Οργανικών Ενώσεων Κασσιτέρου στο Υδάτινο Περιβάλλον της Ελλάδος, 6 ο Συνέδριο Περιβαλλοντικής Επιστήµης και Τεχνολογίας, Πυθαγόρειον, Σάµου, Τόµος Γ', σελ. 438-445, Σεπτέµβριος 1999. 41. Παυλογεωργάτος Γ., Λέκκας Θ., Σαββοπούλου Σ., Προσδιορισµός διαλυµένου και σωµατιδιακού υδραργύρου στη διεργασία της ενεργού ιλύος, 6 ο Συνέδριο Περιβαλλοντικής Επιστήµης και Τεχνολογίας, Πυθαγόρειον, Σάµου, Τόµος Γ', σελ. 461-466, Σεπτέµβριος 1999. 42. Thomaidis N. S., Stasinakis A., Lekkas T. D., A screening method for the determination of toluene extractable organotin compounds in water samples by ETAAS and chemical modification, International Conference on Instrumental Methods of Analysis-Modern Trends and Applications, IMA99, Vol. I, p. 255-259, Chalkidiki Makedonia Greece, 19-22 September 1999. 43. Thomaidis N. S., Adams F. C. and Lekkas T. D., A simple method for the speciation of organotin compounds in water samples using ethylation and GC-QFAAS, International Conference on Instrumental Methods of Analysis-Modern Trends and Applications, IMA99, Vol. I, p. 260-264, Chalkidiki Makedonia Greece, 19-22 September 1999. 44. Nikolaou A. D., Golfinopoulos S. K., Κostopoulou M. N., Lekkas T. D. (1999). Development of a Purge and Trap Gas Chromatographic Mass Spectrometric Method for THM determination, International Conference on Instrumental Methods of Analysis- Modern Trends and Applications, IMA99, Vol. II, p. 373-377, Chalkidiki Makedonia Greece, 19-22 September 1999. 45. T. D. Lekkas, A. D. Nikolaou, M. N. Kostopoulou and S. K. Golfinopoulos, Comparison of two analytical methods for the determination of chlorination by-products in water, International Conference Protection and Restoration of the Environment V, Vol. I, p. 147-154, Thassos, Greece, 3-6 July 2000. 46. T. D. Lekkas, A. Nikolaou, A. Stasinakis, A. Kotrikla, M. Vagi, M. Kostopoulou, G. Kolokythas, S. Golfinopoulos, N. Thomaidis, A. Petsas, G. Gatidou and D. Babos, Determination of the substances of Catalogue II of the 76/464/EEC Directive in the surface waters of Greece, International Conference Protection and Restoration of the Environment V, Vol. I, p. 163-171, Thassos, Greece, 3-6 July 2000. 47. Vagi M.C., Petsas A.S., Kostopoulou M.N. and Lekkas T.D., Monitoring of pesticide residues in the surface waters of Greece, International Conference Protection and Restoration of the Environment V, Vol. I, p. 181-186, Thassos, Greece, 3-6 July 2000. 48. Kotrikla A. and Lekkas T., A semi-empirical approach for the prediction of retention of a herbicide mixture with reversed-phase HPLC, International Conference on Pesticides and Relative Organic Compounds in the Environment, p. 21-25, Ioannina, Greece, 5-8 October 2000. 49. Vagi M., Petsas A., Kostopoulou M. N. and Lekkas T. D., Organophosphorous insecticides in Greece (GR), International Conference on Pesticides and Relative Organic Compounds in the Environment, p. 79-83, Ioannina, Greece, 5-8 October 2000. 50. Gatidou G, Kotrikla A., Stasinakis A., Thomaidis N. and Lekkas T. D., Occurrence of the antifouling agents Irgarol 1051, Diuron and Organotin compounds at the ports of Rhodes and Mytilene, International Conference on Pesticides and Relative Organic Compounds in the Environment, p. 199-202, Ioannina, Greece, 5-8 October 2000. 51. Nikolaou A. D., Kostopoulou M. N., Golfinopoulos S. K. and Lekkas T. D., Determination of volatile chlorinated pesticides and other volatile compounds in the surface waters of Greece, International Conference on Pesticides and Relative Organic Compounds in the Environment, p. 271-273, Ioannina, Greece, 5-8 October 2000. 52. Vagi M.C., Petsas A.S., Kostopoulou M.N., Lekkas T.D. Pesticide Residues in the Surface Waters of Greece. Proceedings of the 5 th International Conference on Environmental Pollution, pp. 413-419, Thessaloniki, Greece, 2000. 53. Golfinopoulos S.K., Kostopoulou M.N, Nikolaou A.D., Lekkas T.D., Evaluation of methods for determination of volatile organic compounds in drinking water. Proceedings

of 18th Greek Conference on Chemistry: Instrumental analysis, pp. 129-133, Pireaus, 10-13 March 2001. 54. Stasinakis A.S., Mamais D., Thomaidis N. and Lekkas T.D., Evaluation of Cr(VI) behavior and toxicity in an activated sludge pilot plant, 1 st European Bioremediation Conference, p. 206-208 Chania, Greece, July 2-5, 2001. 55. Kotrikla A., Gatidou G., Lekkas T., Stability of herbicides in surface water and solidphase extraction cartridges, Proceedings of International Conference Ecological Protection of the Planet Earth, Vol. I, pp. 95-102, Xanthi, Greece, 5-8 June 2001. 56. Giokas D.L., Kim Y., Paraskevas P.A., Paleologos E.K., Lekkas T.D., Modelling activated sludge dilution in secondary clarifiers. Application to the prediction of the sludge blanket height, 7 th Conference on Environmental Science and Technology, Hermoupolis, Syros, Vol. I, pp. 253-259, 3-6 September 2001. 57. Golfinopoulos S.K., Nikolaou, A.D. and Lekkas, T.D., Disinfection by-products and volatile organic compounds in Athens water supply system, 7 th Conference on Environmental Science and Technology, Hermoupolis, Syros, Vol. I., pp. 260-267, 3-6 September 2001. 58. Lekkas Τ., Kolokythas G., Nikolaou Α., Kostopoulou Μ., Kotrikla Α., Gatidou G.,Thomaidis Ν., Golfinopoulos S., Makri Ch., Babos D., Vagi Μ., Stasinakis Α., Petsas A., Existence of priority pollutants in Greek surface waters and legal instruments for their protection in compliance with 76/464/EEC directive, 7 th Conference on Environmental Science and Technology, Hermoupolis, Syros, Vol. II, pp. 524-533, 3-6 September 2001. 59. Stasinakis A., Mamais D., Vassalou A., Nakou E., Lekkas T., Effect of chromium (VI) on heterotrophic maximum specific growth rate (µ m ) in activated sludge systems, 7 th Conference on Environmental Science and Technology, Hermoupolis, Syros, Vol. II, pp. 846-853, 3-6 September 2001. 60. Gatidou G., Kotrikla A., Lekkas T., Stability of Irgarol 1051 and Diuron on disposable solid-phase extraction precolumns and their presence at two Greek ports, 7 th Conference on Environmental Science and Technology, Hermoupolis, Syros, Vol. III, pp. 104-108, 3-6 September 2001. 61. Georgopoulos N., Thomaidis N., Stasinakis A., Grigoropoulos A., Lekkas T., Monitoring of the pollution from heavy metals in surface waters of Greece, 7 th Conference on Environmental Science and Technology, Hermoupolis, Syros, Vol. III, pp. 114-118, 3-6 September 2001. 62. Myrkou K., Paraskevas P.A., Kolokythas G., Nikolaou A.D. and Lekkas T.D. Quality of surface waters in Greece regarding the nitrate concentration, 7 th Conference on Environmental Science and Technology, Hermoupolis, Syros, Vol. III, pp. 347-352, 3-6 September 2001. 63. Stasinakis A., Thomaidis N., Giannes A., Lekkas T., Toxicity of arsenic and mercury speciation in activated sludge, 7 th Conference on Environmental Science and Technology, Hermoupolis, Syros, Vol. III, pp. 492-499, 3-6 September 2001. 64. Vagi, M.C., Petsas A.S., Kostopoulou M.N. and Lekkas T.D., Sample Handling Strategies for the Trace-Level Determination of Pesticides and Their Degradation Products in Environmental Matrices, 7 th Conference on Environmental Science and Technology, Hermoupolis, Syros, Vol. III, pp. 565-571, 3-6 September 2001. 65. Lekkas T.D., Kostopoulou M.N., Nikolaou A.D., Golfinopoulos S.K. and Kolokythas G.A., A four-year survey on the occurrence of volatile organic compounds and legislative control of their concentrations in the surface waters of Greece, 1st Environmental Conference of Macedonia, Thessaloniki, pp. 128-133, 1-4 March 2002. 66. Paraskevas P.A., Giokas D.L. and Lekkas T.D., Wastewater management in coastal urban areas: the case of Greece, 3rd International Black Sea Conference, pp. 469-487, Varna, Bulgaria, 6-8 June 2001 67. Nikolaou A.D., Golfinopoulos S.K. and Lekkas T.D., Investigation of the formation of organic by-products during chlorination of surface waters, International Conference Protection and Restoration of the Environment VI, Vol. I, pp. 115-122, Skiathos, Greece, 1-5 July 2002.

68. Paraskevas P.A., Kavouraki C., Mavraki D. and Lekkas T.D., Reuse of treated wastewater in small islands of Cyclades in the South Aegean region, International Conference Protection and Restoration of the Environment VI, Vol. II, pp. 731-737, Skiathos, Greece, 1-5 July 2002. 69. Nikolaou A.D., Golfinopoulos S.K., Arhonditsis G.B., Kolovoyiannis V. and Lekkas T.D., Modeling the Formation of Chlorination by-products in River Waters with Different Quality, Conference 3 rd Aegean Analytical Chemistry Days, Polychnitos, Lesvos, Greece, pp. 153-156, 29 September - 3 October 2002 (Poster presentation). 70. Gatidou G., Kotrikla A., Thomaidis N.S. and Lekkas T.D., Simultaneous Determination of Two Antifouling Booster Biocides and their Degradation Products in Marine Sediments by HPLC-DAD, Conference 3 rd Aegean Analytical Chemistry Days, Polychnitos, Lesvos, Greece, pp. 186-189, 29 September - 3 October 2002 (Poster presentation). 71. Kotrikla A. and Lekkas T.D., Comparison of Different Approaches in Order to Estimate the Limit of Detection of an HPLC Method, Conference 3 rd Aegean Analytical Chemistry Days, Polychnitos, Lesvos, Greece, pp. 463-466, 29 September - 3 October 2002 (Poster presentation). 72. Thomaidis N., Stasinakis A. and Lekkas T.D., Chemical Modifiers for the Determination of Toluene Extractable Organotins in Water Samples by ETAAS, Conference 3 rd Aegean Analytical Chemistry Days, Polychnitos, Lesvos, Greece, pp. 491-494, 29 September - 3 October 2002, (Poster presentation). 73. Λέκκας Θ., Μπάµπος., Νικολάου Α., ιαχείριση υδατικών πόρων σύµφωνα µε την Οδηγία-Πλαίσιο 2000/60/ΕΕC Εφαρµογή στα επιφανειακά νερά της Ελλάδας, 5ο Πανελλήνιο Συνέδριο Περιβάλλοντος, Περιβάλλον, Ενέργεια και Ανάπτυξη, Ρόδος, 1-3 Νοεµβρίου 2002, Φυσικός Κόσµος, τεύχος 11 (2003) σελ.58-62. 74. Λέκκας Θ., Κωστοπούλου Μ., Κολοκυθάς Γ., Πέτσας Α., Βαγή M., Στασινάκης A., Θωµαΐδης N., Γατίδου Γ., Κοτρίκλα Α., Γκολφινόπουλος Σ., Μακρή Χ., Λέκκας., Νικολάου Α., ιερεύνηση των ουσιών προτεραιότητας που ανήκουν στη νέα Οδηγία- Πλαίσιο για το νερό στα επιφανειακά νερά της Ελλάδας, 4η ιεθνής Έκθεση και Συνέδριο για την Τεχνολογία του Περιβάλλοντος, Τεχνικό Επιµελητήριο Ελλάδας, HELECO 03, Αθήνα, 30 Ιανουαρίου 2 Φεβρουαρίου 2003, Τόµος A, Σελ. 232-239. 75. Lekkas T., Kostopoulou M., Kolokythas G., Thomaidis N., Golfinopoulos S., Kotrikla A., Pavlogeorgatos G., Stasinakis A., Nikolaou A., Gatidou G., Petsas A., Vagi M., Babos D., Lekkas D. and Makri C., Optimization of analytical methods for the determination of trace concentrations of toxic pollutants in drinking and surface waters, 8 th Conference on Environmental Science and Technology, Lemnos, Greece, 2003, Vol. A., 547-556. 76. Nikolaou A., Arxontitsis G., Kolovoyiannis V., Golfinopoulos S., Lekkas T., Determination, Interpretation and Modeling of Chlorination by-products concentrations in surface waters, 8 th Conference on Environmental Science and Technology, Lemnos, Greece, 2003, Vol. A., 658-665. 77. Babi K.G., Koumenides K.M., Nikolaou A.D., Mihopoulos N.S., Tzoumerkas F.K., Makri C.A. and Lekkas T.D., Pilot - plant experiments for the removal of THMs, HAAs and DOC from drinking water by GAC adsorption- Galatsi water treatment plant, Athens, 8 th Conference on Environmental Science and Technology, Lemnos, Greece, 2003, Vol. A., 52-63. 78. Gatidou G., Kotrikla A., Rontogianni V., Thomaidis N.S. and Lekkas T.D., Toxic effects of the antifouling biocide irgarol 1051 and its principal metabolite on the green alga dunaliella tertiolecta, 8 th Conference on Environmental Science and Technology, Lemnos, Greece, 2003, Vol. B., 240-247 (Poster Presentation). 79. Lymperopoulos S.T., Paraskevas P.A. and Lekkas T.D., Evaluation of the efficiency of Sparti s upgraded and expanded sewage treatment plant, 8 th Conference on Environmental Science and Technology, Lemnos, Greece, 2003, Vol. B., 500-507 (Poster Presentation). 80. Lekkas Τ., Kostopoulou M., Petsas A., Vagi M., Golfinopoulos S., Stasinakis Α., Thomaidis N., Pavlogeorgatos G., Kotrikla A., Gatydou G., Kolokythas G., Makri Ch.,

Babos D., Lekkas D., and Nikolaou Α. "Monitoring toxic priority pollutants in natural and drinking waters in Greece", 3rd CCMS NATO Workshop on Management of Industrial Toxic Wastes and Substances Research: Natural and Drinking Water Contamination From Toxic And Hazardous Wastes, 3-4 October 2003, Mytilene, Greece, pp. 62-72. 81. Λέκκας Θ. Πιλοτική λειτουργία φίλτρου ενεργού άνθρακα για την ελαχιστοποίηση των οργανικών παραπροϊόντων χλωρίωσης στο νερό ύδρευσης της Αθήνας, 10ο Πανελλήνιο συνέδριο φυσικής, "Εξελίξεις, Τάσεις, Επιτεύγµατα και ιδακτική της Φυσικής", Ένωση Ελλήνων Φυσικών, Λουτράκι 29-31 Ιανουαρίου & 1 Φεβρουαρίου 2004 82. Nikolaou A.D., Lekkas T.D., Golfinopoulos S.K., Chlorination by-products in water: aspects of formation, decomposition and halogen incorporation, "Protection and Restoration of the Environment VII", 28 June - 1 July 2004, Mykonos, Greece, submitted. 83. Λέκκας.-Φ., Μακρή Χ., Γκολφινόπουλος Σ., Νικολάου Α., Μπαµπή Κ., Κουµενίδης Κ., Λέκκας Θ., Ποιότητα νερού - εναλλακτικές µέθοδοι απολύµανσης - ελαχιστοποίηση τοξικών οργανικών ενώσεων: εφαρµογή στο νερό ύδρευσης της Αθήνας, 5ο Εθνικό Συνέδριο της Ελληνικής Επιτροπής ιαχείρισης Υδατικών Πόρων (ΕΕ ΥΠ) «Ολοκληρωµένη ιαχείριση Υδατικών Πόρων µε Βάση τη Λεκάνη Απορροής» 6-9 Απριλίου 2005, Ξάνθη, submitted. 84. Lekkas T., Nikolaou A., Determination of bromopropylate in grapes by gas chromatography: evaluation of two analytical methods, 3rd European Conference on Pesticides and Related Organic Micropollutants in the Environment, 7-10 October 2004, Halkidiki, Greece, submitted.