HEAVY METAL BIOACCUMULATION IN THE RECREATION AREAS OF CHISINAU CITY REPUBLIC OF MOLDOVA

This study comparing the ability of bioaccumulation of heavy metals (Pb, Cd, Ni, Cr) present in the atmosphere of the main recreational areas of Chisinau city. As organisms’ bioaccumulation were used species of lichens Physcia ascendens and Physcia grisea and species of moss Leskeela nervosa, Leskeela polycarpa and Pylaisia polyantha. Method used to determine concentrations of heavy metals was that of atomic absorption spectrometry. The results showed that a higher capacity to bioaccumulate a heavy metals has the lichens, their content is in close dependence on the source of pollution and pollution of biotope investigated. Such recreation areas in the center and some recreational areas in the south of Chisinau municipality recorded the highest concentrations of heavy metals in bioindicator thallus. Exceeding the limit values for Pb were observed in both thallus (lichens and moss), in all recreation areas of the city, indicating that the major source of this metal pollution is local.