The values of parameters and results of HQ and HI are listed in table 5. The HQ and HI for both
children and adults have the same trends. The values of HQ for those pathways of this study decrease in
the order of ingestion>dermal contact>inhalation. The contribution of HQing to HI (the total risk) is
highest, more than 80%. This indicated that the ingestion is a primary pathway of heavy metals harming
to human health, then the dermal contact and the inhalation is lowest. This result is consistent with earlier
researches [32].