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《》 2003-04
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Contents of heavy metals in soils and Chinese cabbages (Brassica chinensis) from some urban vegetable fields around Nanjing and the human health risks

DING Ai-fang1, 2, PAN Gen-xing1 1. Institute of Resources, Ecosystem and Environment of Agriculture, Nanjing Agricultural University, Nanjing 210095, China; 2. Nanjing Xiaozhuang College, Nanjing 210037, China  
Increasing population is facing the environmental pollution in urban area with the urbanization in China since the last two decades. However, a portion of urban people relies on the vegetables grown in local fields around city but the health risks by consuming them have been hardly discussed. In this paper, 18 paired samples both of soils and Chinese cabbages grown in urban fields were sampled and the contents of Cu, Zn, Pb and Cd were digested and determined by AAS. The soil contents of Cu, Zn, Pb and Cdvaried in the range of 39.38±9.85, 254.79±132.77, 67.77±57.52, 1.03±1.28 mg/kg respectively. Whereas, the contents in leaves of Chinese cabbages were 5.00±1.57, 62.21±16.05, 5.90±3.09, 0.73±0.39 mg/kg,with the later two elements exceeding the national hygienic limits for foods. A calculation with the RfD values recommended by USEPA showed high human health risk from consuming these Chinese cabbages under a Chinese diet. The highest rate of contribution to RfD of Pb and Cd of severely polluted vegetable samples amounted to 90.66%, 42.17% respectively.
【Fund】: 教育部重点研究项目(2002012);; 江苏省教育厅项目(03KJD170122)
【CateGory Index】: X53
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