Researching the quality (cleanliness) of water of the Susdalskie lakes.
Nikolay Klimenko, school # 150, 10-th year
Michail Monastyrenko, school # 623, 10-th year
The Susdalskie lakes are situated in limits of Saint-Petersburg and serve as a favorite resting place for many town-dwelers. That’s why it’s important for water of these lakes to be clean.
We performed investigation that included determination of concentration of nitric compounds in forms of nitrates, nitrites and ammonium salts.
All chemical analyses of water was done in ..... laboratory of СПГТУ РП.
The results tells that water of 1-st and 2-nd lake consistence of nitric compounds is low in all three forms and conforms with ecological standards. In water of 3-rd lake it’s observed high concentration of nitrites and ammonium salts that significantly exceeds highest permissible concentrations. Concentration of nitrites is 0.44 milligrams per liter and concentration of ammonium nitrogen is 0.38 milligrams per liter. Ecological norms are correspondingly 0.08 and 0.38 milligrams per liter maximum.
In same time snow coverage of the lakes was analyzed, because it’s pollution also aggravates the ecology of the lakes.
The results of research entered into the database of ecological condition of reservoirs of Saint-Petersburg area.