COMPARATIVE STUDY ON HEAVY METAL POLLUTION OF SURFACE DUST IN TYPICAL INDUSTRIES ENVIRONMENT

With the promotion of industrialization and urbanization，much attention is being paid to heavy metal pollution of the industry environment． The dusts from 10 typical industries environments in Beijing were selected as the research objects， the different particle size distribution of the dusts，Pb，Cr，Cu，Zn，Ni concentration and contribution rate were analyzed． The heavy metal pollution levels in the surface environment of different industries were evaluated by means of the single factor pollution index and comprehensive pollution index． The results show that the comprehensive pollution levels of the wholesale industry，industry，catering industry and transportation industry are high，culture and sports industry and education industry are relatively low．