| The content of Hg, Cd, As, Pb, Cr and Cu in 54 representative surface dust samples from Korla, Xinjiang, were detected. The main source of the heavy metals were analyzed based on BM (Barycenter) model and PMF (positive matrix factorization) model. The results indicated that the content center of Hg, Cd, As, Pb, Cr and Cu in the surface dust of Korla deviated from the geometrical center. The distribution of these elements was uneven. Hg and Pb in the samples originate from industry, transportation and coal combustion, As depended upon the parent material of soil, Cd, Cr, and Cu were mainly affected by traffic emission. BM model had certain application prospects in source analysis of heavy metals in surface dust. |
