Content and Distribution of Lead in Household Dust near a Smelter in Yunnan

The aim of this study was to investigate lead (Pb) level and spatial distribution pattern in the household dust around a smelter in Yunnan. The Pb content in the dust ranges from 191~13371mg/kg, with significant differences among the investigated villages, and 89.33% of the samples exceed the secondary limit of Chinese Soil Environmental Quality Standard for Pb. Spatial analysis shows that the pollution center was close to CH-co, and the radial distribution pattern is consistent with the predominant wind derection. The investigation proved that, lead emitted from the smelting process via atomospheric deposit is the main source of the Pb in the indoor dust, which may cause a potential adverse effect on people in the studying district.