Both the
Hazard Quotient values for single metals and the Hazard Index value for all studied metals are far lower
than the safe level for children and adults, indicating no risk from these metals. However, the HI values of
Pb and Cr for children are 0.741 and 0.805, suggesting that particular attention should be paid. For every
heavy metal, the values of HI for children are magnitude higher than those for adults, meaning that
children face greater harmful health risks due to the park dust metals than adults. In conclusion, it is
indicated that health risk values obtained for selected metals in roadside dusts from Beijing are in the
neglectable range. This research will be quite useful for both residents in taking protective measures and
government in alleviating heavy metals pollution of urban roadside environment.
Both theHazard Quotient values for single metals and the Hazard Index value for all studied metals are far lowerthan the safe level for children and adults, indicating no risk from these metals. However, the HI values ofPb and Cr for children are 0.741 and 0.805, suggesting that particular attention should be paid. For everyheavy metal, the values of HI for children are magnitude higher than those for adults, meaning thatchildren face greater harmful health risks due to the park dust metals than adults. In conclusion, it isindicated that health risk values obtained for selected metals in roadside dusts from Beijing are in theneglectable range. This research will be quite useful for both residents in taking protective measures andgovernment in alleviating heavy metals pollution of urban roadside environment.
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