Source Identification of Heavy Metals on Surface Soil in Guiyang City, China

摘要

In this research, multivariate statistical analysis was employed for heavy metals sources identification of 89 samples of urban surface soil. Results indicated that concentrations of surface soil heavy metals were generally higher than environmental background values of soil elements. The concentration of Pb on surface soil in Guiyang city was lower than those in other cities for the short time usage of Pb gasoline. The concentrations of Cu, Ni and Zn on surface soil in Guiyang city were higher than those in more parts of cities for the size and production skill of steel plant, automobile emissions and external soil. The major sources of surface soil elements were the vehicle emissions, steel plant, geo-chemical genesis and external source. It was limited to identify heavy metals sources by using CA and PCA. We must analyze the spatial distribution characteristics of elements by the GIS technique and ambient environmental conditions.