Research Team: Rammou Anna Kalafati Alexiana Basileiadou Lena Sea Pollution of the Gulf of Elefsina (Thriassio Pedio area, Attiki, Greece) Research Team: Rammou Anna Kalafati Alexiana Basileiadou Lena

AIMS WATER QUALITY IN INDUSTRIAL AND URBAN AREAS AROUND ATHENS 2. SOURCES OF POLLUTION, THE CONSEQUENCES OF POLLUTANTS ON MARINE LIFE AND HUMANS 3. SUGGESTIONS AND SOLUTIONS 4. COMPARISON OF RESULTS WITH THE FOREIGN STUDENTS

HYPOTHESIS POLLUTION FROM: INDUSTRIAL EFFLUENTS URBAN WASTEWATER AGRICULTURAL RUN-OFF

EXPERIMENTAL INVESTIGATION Two areas of the region were sampled, at Aspropyrgos (a heavily polluted area) and at Loutropyrgos (less polluted area). The water samples were analysed for suspended solids, nitrates (NO2-) and chlorophyll by the University Lab.

SAMPLING AREA Sampling Area

SAMPLING POINTS Sampling Point Sampling Point

Suspended solids (SS) The samples size was two (2) litres of water from Aspropyrgo and Loutropyrgo. Dry filter papers in oven at 103 °C – 105 °C and then weight to the nearest milligram and record the mass (Mfilter). Filtrate the sample Dry the filtrated filter papers in oven Weight to the nearest milligram and record the mass (Mdried_filter). Mfilter + Mss = Mdried_filter and Mss = Mdried_filter – Mfilter

Suspended solids RESULTS Sample Suspended solids mg/l Aspropyrgos 9.5 Loutropyrgos 9.0

Nitrates Spectrophotometric method. Addition to the samples of various solutions to form colour. Prepare three standard solutions of NO2- of 0.1, 0.2 and 0.3 μg/l Measure of absorbtion by a spectrophotometer of the standard solutions and the samples.

How absorbtion(Α) is connected with concetration (c)? HYPOTHETICAL FACT: Α=axc+b (a, b=ct) Concentration NO2(μg/l) Absorbtion 0.1 0.0922 0.2 0.1572 0.3 0.2863

That’s the linear relationship we are looking for: y=0,4726x+0,0525 Consequently: Α=0.4726c+0.0525 (1) Sample Absorbtion Average Aspropyrgos 1st calculation:0.0546 2nd calculation:0.0526 0.0536 Loutropyrgos 1st calculation:0.0571 2nd calculation:0.0541 0.0556

Nitrates We solve the relationship (1): c=A-0.0525/0.4726 RESULTS Sample Nitrates, mg/l Aspropyrgos 0.0023 Loutropyrgos 0.0065

Chlorophyll Filtrate two (2) litres of water sample from each area. Homogenisation Add 11-12 ml of acetone Centrifuge at 3000 rounds/ min for ten (10) minutes. 2 wavelengths (665 nm and 750 nm) cell’s light path: 5 cm HCL: 8drops

RESULTS Sample Chlorophyll, μg/l Aspropyrgos 0.8437 Loutropyrgos 0.4272

CAUSES OF POLLUTION - LITERATURE REVIEW INDUSTRY: STEEL INDUSTRIES (HALIVOURGIKI) OIL REFINERIES SHIP YARDS Aghios Georgios creek (Tannery) Landfill of Ano Liosia Sewage Sludge (Psittalia)

IMPLICATIONS IMPLICATIONS FOR HUMAN HEALTH SKIN DISEASES CANCER MENTAL RETARDNESS IMPLICATIONS FOR THE ENVIRONMENT REDUCTION OF PLANGTON REDUCTION OF DISSOLVED OXYGEN EYTROPHICATION IMPLICATIONS FOR MARINE ORGANISMS DESTRUCTION OF ALGAE LACK OF FOOD FOR MARINE ORGANISMS

SUGGESTIONS - SOLUTIONS PSITTALIA (SEWAGE SLUDGE) LANDFILL (LEACHATE) LEGISLATION INVESTMENT IN POLLUTION ABATEMENT TECHNOLOGY PEOPLE AWARENESS

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