water examination
DESCRIPTION
water examinationTRANSCRIPT
Be Alert! Protect Nature
Εκπαίδευση και ΠολιτισμόςΠΡΟΓΡΑΜΜΑ ΔΙΑ ΒΙΟΥ ΜΑΘΗΣΗCOMENIUS
Aliakmon River-Natura 2000
Tripotamos River
Canal 66 River
Collection of water samples
Chemical analysis of the water’s samples
What we analyse: The pH value of the water1.The pH value is very decisive for the assessment of water. The scale of possible pH values ranges from pH 0 (extremely acidic) to pH 14 (extremely basic). In the middle of the pH scale is the neutral point at a pH value of 7. In an ideal case the pH value of clean water should range around pH 7.Every change in pH by one unit means 10 times more or less acid’s concentration.2. The pH is influenced by temperature, rocks, photosynthesis and human activities.3. The pH is important as plants and animals have their own pH value range and they have low tolerance to changes
The pH value of the water
0-6,5 : acidic region
6,5-7,5: neutral region
8-14: basic region
6-8: Limits preference for living in freshwater fish.
6,5-8,5: Drinking Water Regulations for EC
6,5-8,4:Desired limits for irrigation water.
What we analyse:
-3 :
1. come mainly from excessive pollution of agricultural crops, raw sewage and atmospheric precipitation .2.In excessive quantities cause eutrophication of water.
The Nitrate salts NO
If it enter in the body of young children in large quantities or for long periods,causing disease.3. Allowable limits for drinking water: 25-50mg/lt
What we analyse:
2 : 1. derived from the decomposition of dead organisms, sewage,fertilizers,industrial waste and food preservatives.2. In excessive concentrations are toxic to humans
The Nitrite Salts NO
and cause suffocation of organisms.3.Allowable limits for drinking water : less than 0,1mg/lt
What we analyse:
34 :
1. derived from erosion of phosphate rocks, rain, throwing manure, industrial waste, detergents,and when the biological cleaning not working properly.2.cause eutrophicatio
The Phosphate Salts PO
n.3.Allowable limits of less than 50mg/lt.4. Allowable limits for drinking water less than 40mg/lt.
What we analyse:
4 : 1. , , .2. .3. lim : 30 / .4. lim
The Ammonium Salts NHderived from the decomposition of dead organismsfertilizers litter and residential sewage pipescause pollutionAllowable its less than mg ltAllowable it
less than 5mg/lt.s for drinking water
ResultsAliakmon River
Tripotamos River
Canal 66 River
pH value 1th: 6,32th: 7,5
1th: 8,52th: 8,7
1th: 7,52th: 7,7
1th: 2 mg/lt2th: 2 mg/lt
1th: 3 mg/lt2th: 3 mg/lt
1th: 3 mg/lt2th: 3 mg/lt
1th: 0,02 mg/lt2th: 0,02 mg/lt
1th: 0,02 mg/lt2th: 0,02 mg/lt
1th: 0,02 mg/lt2th: 0,02 mg/lt
1th: 0,5 mg/lt2th: 0,3 mg/lt
1th: 0,2 mg/lt2th: 0,3 mg/lt
1th: 0,3 mg/lt2th: 0,3 mg/lt
1th: 0,2 mg/lt2th: 0,2 mg/lt
1th: 0,2 mg/lt2th: 0,2 mg/lt
1th: 0,1 mg/lt2th: 0,1 mg/lt
3NO
2NO
34PO
4NH
