1. 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

2. 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

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

4. 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.

5. SAMPLING AREA
Sampling Area

6. SAMPLING POINTS
Sampling Point
Sampling Point

7. 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

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

9. 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.

10. 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

12. That’s the linear relationship we are looking for: y=0,4726x+0,0525 Consequently: Α=0.4726c (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

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

14. 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

15. RESULTS Sample Chlorophyll, μg/l Aspropyrgos 0.8437 Loutropyrgos
0.4272

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

17. 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

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

19. THANK YOU FOR YOUR ATTENTION