Assessment of Heavy Metal Pollution in Vegetables and Vegetable Garden Soil in Suburban Neijiang

Heavy metal pollution in vegetable garden soil and vegetables such as cabbage,leek,carrot,radish,brinjaul,lettuce,celery,cowpea,Chinese watermelon in suburban Neijinag was analyzed and assessed.The results indicated that the average contents of Cu,Zn,Pb,Cd and Cr in the vegetable garden soil of suburban Neijiang were 77.53 mg/kg,165.17 mg/kg,0.147 mg/kg,92.34 mg/kg and 79.56 mg/kg respectively,which,in comparision,were 249.28%,190.97%,298.83%,185.65%,100.70% of the soil background values in Sichuan province,showing that the soil has been lightly Cu-,Pb-and Zn-polluted and heavily Cd-polluted,and combined pollution of Cu,Pb Zn was common in the soil.The heavy metal contents of vegetables rank in the order of ZnCuPbCr Cd,and the order of the heavy metal enrichment coefficients for the nine kinds of vegetables was as follows: Cd ZnCuPbCr.Many elements' concentration in vegetables did not exceed the national vegetable sanitation standard except that of Pb in cabbage,cowpea,lettuce and celery.