PAN Huahua1, WANG Dongqi2, ZHANG Ju3, WANG Yongjie2, JIN Shulan1, ZENG Yongsheng2, WU Peiling2

（1. School of History Geography and Tourism, Shangrao Normal University, Jiangxi Shangrao 334001, China;
2. School of Geographic Sciences, East China Normal University, Shanghai 200241,China;
3. School of Geography and Environment, Liaocheng University,Shandong Liaocheng 252000,China）

Abstract： Road dust and foliar dust samples were collected from 37 sites in six functional districts in the city center of Shangrao. The contents of heavy metals, including Cr, Cu, Ni, Pb and Zn, in the dust samples were analyzed and evaluated via the ground accumulation index and the health risk assessment method recommended by U.S. Environmental Protection Agency. The results show that the contents of heavy metals in road dust in the city center of Shangrao were Zn (282.8 mg/kg) >Cu (71.0 mg/kg) >Cr (64.7 mg/kg) >Pb (51.0 mg/kg) >Ni (23.0 mg/kg). The contents of heavy metals in foliar dust were Zn (427.8 mg/kg) >Cu (208.7 mg/kg) >Pb (121.1 mg/kg) >Cr (94.2 mg/kg) >Ni (30.8 mg/kg). The average content of all heavy metals in foliar dust was higher than that in road dust, with Zn, Cu and Pb significantly higher than the soil background values in Jiangxi Province. The average contents of heavy metals in road dust were significantly higher in commercial and economic development districts, whereas the lowest average contents were found in cultural and educational districts. The contents of heavy metals in foliar dust in economic development and residential districts were higher than those in parks and green spaces as well as commercial traffic districts. Zn, Cu and Pb in road dust were originated predominately from industry and traffic emission. Zn, Cu and Pb in foliar dust were mainly derived from the industry and domestic pollution. Cr and Ni were mostly affected by non-ferrous metal production and deep processing. The heavy metal pollution in foliar dust was greater than that in road dust, with Cu, Zn and Pb above the light pollution level. Zn in road dust as well as Zn and Cu in foliar dust had certain non-carcinogenic risk through hand-oral ingestion. No carcinogenic risk for Cr and Ni was identified in both dusts.

Key words：road dust; foliar dust; heavy metals; pollution characteristics; health risks; Shangrao

EARTH AND ENVIRONMENT Vol.51, No.4, Tot No.354, 2023, Page 422