In present conditions, in which urban pollution generates many concerns at the level of international establishment involved in assuming decisions regarding Earths health, an important role is played by the green areas located in cities. These green areas are, also, of high importance, especially when their presence involves the existence of ornamental trees, used frequently in urban spaces (chestnut, linden, pine) that can substantially contribute in improving air quality. Regarding the quantification of air quality using trees as biomonitors, samples of tree leafs’ tissue and/or needles were collected from three species of ornamental trees, located in the proximity of two monitoring stations in Cluj-Napoca, subjected to different intensity of pollution degrees, twice a week, during the experimental period April-September 2014-2015. The research results, proves that the species Aesculus hippocastanum have the highest capacity of bioaccumulation of lead (33.9 ppm, CLU – 4). In terms of the capacity to bioaccumulate cadmium, the best results were obtained in the case of the species Aesculus hippocastanum (3.45 ppm, CLU-4) and Pinus nigra (3.22 ppm, CLU-1).

air quality, biomonitors, micronutrients, ornamental trees.

Presentation: oral