International journal of Advanced Biological and Biomedical Research (IJABBR) Available online at http://www.ijabbr.com Volume 1, Issue 1 (March, 2013), PP 53-60 Corresponding Author : M. Daylam-jafarabad, E-mail: Mehdideylam1364@gmail.com 53 | Page The ability to filter heavy metals of lead, copper and zinc in some species of tree and shrub M. Daylam-jafarabad 1* , D. Azadfar 2 , M.H. Arzanesh 2 1 M.Sc. student, Gorgan University of agricultural science and natural resource, Gorgan. Iran 2 Assistant proof. Gorgan University of agricultural science and natural resource, Gorgan. Iran ABSTRACT Heavy metals found in urban air with its toxic effects have a direct impact on human health. Selection of appropriate tree species and shrub refining capacity of heavy metals in urban areas can greatly reduce the toxic effects of these materials. This study aimed to identify the most suitable tree and shrub species of broadleaf evergreen, deciduous and coniferous refinement of heavy metals lead, copper and zinc in the air in both units and total leaf weight. 12 species of tree and shrub leaves in City Park in Gorgan in summer (August 2010) was sampled. Heavy elements present in the samples were prepared and measured by atomic absorption instrument. The results showed that the performance of the trees in comparison to shrubs refinement of heavy metals lead, copper and zinc were more appropriate. Among the species present for purification of Pb and Zn, refine Shiraz, Magnolia and Cypress Pine copper refinery in Shiraz were the best and Tehran and Palvnya had the best performance for copper. Key words: Season, Species, Absorb, Heavy metals, lead, copper, zinc, Gorgan province, INTRODUCTION Green wooden elements have extremely high impact on the shaping of land cover compared to other forms of green space (grass, clay work, landscaping, etc.). In this regard, urban forestry has high impact on declining the bio problems in cities. Urban forestry refers to the arts, science and technology, managing trees and forest resources in and around urban community ecosystems for economic benefits, social and psychological communities from trees. Inadequate and irregular texture and structure of cities requires that we use urban forestry and it's lied characteristics in all inconsistencies. Living in urban ecosystems, with huge buildings, cars, congestion and noise have increased human and environmental problems. In recent years, the idea of salvation of congestion and pollution in urban areas is of great significance. In this regard, one of the most effective solutions to mitigate the adverse effects of urbanization and pollution problems is different natural environments within cities (Zare et al, 2009). Design and management of urban forests as an environmental biotechnology applied normally to reduce some adverse effects which are combined with the phenomenon of the Nation to address long-term planning and policies. So it has always been a basic question that which species have higher capacity for air filtering and urban forestry to benefit of the species diversity could be achieved in all seasons. In recent years, the use of trees to measure heavy metal pollution has increased (Djingova and Kuleff 1993 and Aksoy et al, 1997). Al-Shayeb et al, (1995) used the leaves of palm trees for monitoring the distribution of heavy metals Cu, Ni, Cr, Pb and Zn in the air of Riyadh. Comparison of washed and