The concentrations are higher than local soil background and
roadside soil values, indicating that the pollution may come from anthropogenic sources. Compared to
other cities, the concentrations of these heavy metal are not quite high. The Cu, Zn, Cd and Pb should be
paid more attention. People are exposed to pollutant via ingestion, dermal contact and inhalation. The
main exposure pathway of heavy metals to both children and adults is ingestion.