Survey of vegetable pollution with heavy metal and residual pesticides in Nanhai District of Foshan City

Objective To understand the pollution of vegetable with heavy metals and the pesticide residues.Methods There 40 vegetable samples lableled with green vegetables,241 local cultivated vegetable samples of 47 kind and 50 marcket vegetable samples were collected.In addition,5 heavy metal contents and 9 organophsphorous residue,including lead,cadmium,mercury,chromium,total mercury,arsenic,methamidophos,demeton,1 605,methyl 1 605,Isocarbofos,malathion,dimethoate,and Folimat;omethoate.Results The green vwegetables were also polluted with heavy metals at various degrees,cadmium concentration was 20% exceeded the standard and might be as high as 1.6 times the standard.The lead concentration was 10% exceeding the standard and might be as high as 1.4 times higher the standard.Total mercury,cadmium and lead were the main heavy metal on local cultivated vegetables as the total mercury was 36.9% exceeded the standard and might be as high as 27 times,while the concentrations of cadmium and lead 4.6 times and 5.95 times exceeding the standard.No pesticides residues were detected from the 9 kind of market vegetables.Conclusion The vegetables in nahai District were polluted with heavy metals that are detrimental to the health of the residents.