Presentation on theme: "Sea Pollution of the Gulf of Elefsina (Thriassio Pedio area, Attiki, Greece) Research Team: Rammou Anna Kalafati Alexiana Basileiadou Lena."— Presentation transcript:
Sea Pollution of the Gulf of Elefsina (Thriassio Pedio area, Attiki, Greece) Research Team: Rammou Anna Kalafati Alexiana Basileiadou Lena
AIMS 1.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
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 (NO 2 - ) and chlorophyll by the University Lab.
SAMPLING AREA Sampling Area
Sampling Point SAMPLING POINTS
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 (M filter ). Filtrate the sample Dry the filtrated filter papers in oven Weight to the nearest milligram and record the mass (M dried_filter ). M filter + M ss = M dried_filter and M ss = M dried_filter – M filter
Nitrates Spectrophotometric method. Addition to the samples of various solutions to form colour. Prepare three standard solutions of NO 2 - 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 NO 2 (μg/l)Absorbtion
That’s the linear relationship we are looking for: y=0,4726x+0,0525 Consequently: Α=0.4726c (1) SampleAbsorbtionAverage Aspropyrgos 1 st calculation: nd calculation: Loutropyrgos 1 st calculation: nd calculation:
Nitrates Nitrates We solve the relationship (1): c=A / RESULTS SampleNitrates, mg/l Aspropyrgos Loutropyrgos0.0065
Chlorophyll Filtrate two (2) litres of water sample from each area. Homogenisation Add 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
CAUSES OF POLLUTION - LITERATURE REVIEW 1. INDUSTRY: 1.STEEL INDUSTRIES (HALIVOURGIKI) 2.OIL REFINERIES 3.SHIP YARDS 2. Aghios Georgios creek (Tannery) 3. Landfill of Ano Liosia 4. Sewage Sludge (Psittalia)
IMPLICATIONS 1.IMPLICATIONS FOR HUMAN HEALTH A.SKIN DISEASES B.CANCER C.MENTAL RETARDNESS 2.IMPLICATIONS FOR THE ENVIRONMENT A.REDUCTION OF PLANGTON B.REDUCTION OF DISSOLVED OXYGEN C.EYTROPHICATION 3.IMPLICATIONS FOR MARINE ORGANISMS A.DESTRUCTION OF ALGAE B.LACK OF FOOD FOR MARINE ORGANISMS