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《Journal of Anhui Agricultural Sciences》 2010-19
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Characteristics of Heavy Metal Pollution in Soil and Rice of Yangtze River Delta Region

XIAO Jun-qing et al(College of Environmental Science and Engineering,Hehai University,Nanjing,Jiangsu 210024)  
[Objective] Characteristics of heavy metal pollution in soil and rice of Yangtze River Delta region were studied.[Method] Heavy metal contents of more than 150 sample spots in Yangtze River Delta region were determined so as to make a soil environmental quality assessment and study the content distribution,transformation and distribution characteristics of heavy metals in different regions and different plant parts.[Result] The Yangtze River Delta region was polluted by Cd,Pb,Cr,Cu and Zn,among them Cd pollution was the most serious;Pb,Cu and Zn took second place;Cr pollution came the lightest;And there was almost no Hg and As pollution.The Nemero pollution index of soil was 0.880 which was at the alert level.Cd,Cr,Cu,Hg and Zn in rice grains exceeded the background values.Heavy metal pollutions in soil divided by regions were in order of Taihu Lake region southern region of Zhejiang Province regions along the Yangtze River and municipalities towns and rural areas.Heavy metal pollutions in soil divided by moving-transiting rule were in order of rhizosphere soil rice straw rice grains.Conversion coefficients were in order of Cd Cu Zn As Hg Pb Cr.Distribution coefficients were in order of Zn Cr Cd Cu Hg Pb As.[Conclusion] There was a larger value range of pollution element in the Yangtze River Delta region,moreover individual samples had serious pollution,so the prevention and control of heavy metal pollution should be strengthened.
【Fund】: 中国地质调查局国土资源调查项目(GZTR20060201);; 河海大学自然科学基金项目(2008432511)
【CateGory Index】: X173;X53
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