Characteristics of soil-vegetable pollution of heavy metals and health risk assessment in Daye mining area

The characteristics of heavy metal pollution in soils and vegetables from Tonglvshan,Tongshankou mining area and non-mining area were analyzed by using single factor index method,Nemero integrative pollution index method and different evaluation standards of pollution for comparison.Furthermore,the potential health risk of local people was also elucidated with intake of heavy metals through consumption contaminated vegetables.The results showed that the serious heavy metal pollutions were found based on both soil natural background values and China National Standard(CNS) as evaluation standard in vegetable soils near the mining area,especially to Cu and Cd.And moderate pollution levels of heavy metals,in which Cd is the main contamination element,were also demonstrated in vegetable soils from non-mining area.In addition,Pb and Cd contents in vegetables from mining area are much higher than that of Chinese food safety and hygiene standards,and this circumstance also happened in some vegetables from non-mining.Pb and Cd health risks in local people of mining area would be produced with intake of contaminated edible vegetables.And the hazards of heavy metals to young children are more susceptible than adults with intake of edible vegetables.