Heavy metal pollution status and dietary exposure risk of marketed vegetables in Yantai City
Objective To investigate the status of heavy metal pollution in vegetable samples in Yantai City,and to assess the dietary exposure risk.Methods According to the national standards,the contents of lead,cadmium,mercury,and arsenic in vegetables were measured and analyzed with the pollution index.The risk of dietary exposure was assessed with the target hazard coefficient(THQ)and total target hazard coefficient(TTHQ).Results The four heavy metals were detected in vegetables to varying degrees.The average contents of lead,cadmium,mercury,and arsenic were 0.0142,0.0028,0.0004 and 0.0071 mg/kg,respectively.The detection rate of cadmium was the high-est,accounting for 35.36%.Of the 758 vegetable samples,2 leek samples had excessive lead,and the over-standard rate was 0.26%.The pollution index and comprehensive pollution index of the four heavy metals were lower than 0.7.Of all samples,bulb vegetables were the most polluted but still at a safe level.The THQ and TTHQ of the four heavy metals for adults and children were less than 1.Conclusion The overall level of heavy metals in vegetables in Yantai City is relatively low.Eating vegetables poses no significant health risk to the human body.
NETL
NSTL
万方数据
维普
