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《Acta Scientiae Circumstantiae》 2002-02
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The concentration and chemical speciation of Pb in Nanjing urban soils

LU Ying 1,2 ,GONG Zitong 2, ZHANG Ganlin 2\ (1.College of Natural Resources and Environment,South China Agricultural University,Guangzhou 510642;2.Institute of Soil Science,Chinese Academy of Sciences,Nanjing 210008)  
The concentration and chemical speciation of Pb in Nanjing urban soils were studied. The results indicated that the mean Pb concentration in urban soils was 107 3?mg/kg, ranging from 36 3 to 472 6?mg/kg, and urban soils were seriously polluted with Pb. For urban topsoils, the Pb was dominated by residual and Fe Mn oxides fractions, and followed by the order of residualFe Mn oxidescarbonateorganicexchangeable. Compared with Pb in non urban soils, Pb in urban soils had not only elevated concentration, but also higher activity and more serious threat to the environment.
【Fund】: 国家自然科学基金重点项目 (498310 0 4);; 中国科学院特别支持项目
【CateGory Index】: X131.3
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