Seas, Ecological Balance and Sustainable Environment. Heavy Metals in the Water of Lake Ohrid and in Fish Species Belbica - Alburnus alburnus alborella de Filippi

Water is a must need for the life and none of the living creatures could exist without it. But, in meantime water could became a cause of some diseases and the death. With the social society development, improvement of the well-being and increase of the number of the residents in our planet, also the individual and economical need for the water is increased. The permanent human being is used only to take things from the nature not to contribute to the “nature”. However human egoism in rapport with nature and the vital environment, which is exploited without control and without any care can destroy the entire ecosystems. All of this is returned to the humans and seen in their life and health. The aim of this paper was analysis and determination of heavy metals like Cu, Zn, Cd, and Pb in water samples of different prophiles from Ohrid Lake. Studied water samples were taken in different locations and different depths (0, 20, 40, 75, 100 and 150 m). The presence of toxic heavy metals in food chain was studied in fish species – Belbica (Alburnus alburnus alborella de Filippi). Determination of analysed heavy metals was done using Atomic Absorption spectroscopy using a Perkin Elmer 370 A and 370 flame – air acetylene and AAS Peyunicam 926 model.