The Content and Contamination Characteristic of Heavy Metals in Road Greenbelt Soil

Abstract

To identify the concentration of heavy metals in greenbelt soils of urban road in different functional zones, 0-15cm and 15-30cm soils were collected from south suburbs of Xian City. The concentrations of Cr, Pb, and Cu were determined and contamination level were assessed using single pollution index and geoaccumulation index. The results indicated that the highest contamination level was dominated by Pb and Cu. In addition, Pb was accumulated in 0-15cm soils especially, and the concentrations of three heavy metals in 0-15cm were higher than those in 15-30cm. The geoaccumulation index indicated that the contamination levels of these heavy metals in descending order was industrial area, busy roads, commercial areas, and park areas. The highest contamination degree of heavy metals were dominated by Cu, followed by Pb , which have correlation with industrial activities and traffic transport, while no Cr polluted.