Adila ISMAYIL1, Mamattursun EZIZ1,2,3, Alimujiang KASIMU1,3, Nasima NASIRDIN1
（1. College of Geographical Science and Tourism, Xinjiang Normal University, Urumqi 830054, China;
2. Xinjiang Laboratory of Lake Environment and Resources, Xinjiang Normal University, Urumqi 830054, China;
3.Silk Road Economic Belt Urban Development Research Center, Xinjiang Normal University, Urumqi 830054, China;）
Abstract: A total of 52 road dust samples were collected from a typical petroleum city, Karamay, Xinjiang, and the concentrations of six heavy metals, such as As, Cd, Cr, Cu, Pb, and Hg were measured. The pollution level of heavy metals in road dust was analyzed using the pollution load index (PLI), while the spatial distribution patterns of heavy metals were analyzed based on the GIS technology and the Geo-statistical analysis methods, and the sources of heavy metals in road dust was discussed using the multivariate statistical analysis. The results showed that the average concentrations of As, Cd, Cu, Pb, and Hg in road dust of Karamay city is 1.61, 1.75, 1.50, 1.23, and 2.94 times of the soil background in Xinjiang, respectively. Road dust is moderately polluted by Hg, and slightly polluted by As, Cu, Cr, and Pb, and less polluted by Cd. The spatial distribution pattern of heavy metals in road dust of Karamay indicated higher concentrations and higher pollution level in the northwestern parts of the city. The pollution sources analysis showed that Hg, As, Pb, and Cd are mainly originated from anthropogenic sources, while Cu and Cr are mainly controlled by the geochemical characteristics of soil.
Key words: road dust; heavy metals; spatial distribution; sources; Karamay City
EARTH AND ENVIRONMENT Vol.48, No.5, Tot No.337, 2020, Page 544-551
