Abstract: The absorption capacity of 30 kinds of Northeast main greening tree species to As in the atmosphere were measured and studied by Atom Fluoresence Method.The results showed that all these greening tree species could absorb As pollutants to some extent,and the absorption capacity is obviously different according to pollution conditions and tree species.The greening tree species that have a high absorption content to As such as Prunus armeniaca,Ulmus pumila,Ulmus pumila var.pendula and Phellodendron amurense,could be acted as greening trees in serious areas of As pollution.Moreover,the absorption extent of different species to As were obviously different in similar areas of pollution origin and degree.

Key words: Northeast, greening tree species, absorption capacity, As