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|Type:||Artigo de periódico|
|Title:||Distribution Of Lead In The Soil Profile Evaluated By Dtpa And Mehlich-3 Solutions [distribuição De Chumbo No Perfil De Solo Avaliada Pelas Soluções De Dtpa E Mehlich-3]|
|Author:||De Abreu C.A.|
De Abreu M.F.
De Andrade J.C.
|Abstract:||Significant increase in the Pb content in cultivated soils has been observed near industrial areas. The objective of this work was to evaluate the soil Pb distribution profile near and distant of the lead emiting point, located between the Presidente Dutra highroad and the Caçapava Velha City, State of São Paulo, Brazil and to compare the Pb contents found by using DTPA and Mehlich-3 extracting solutions. Soil samples were collected at 500 and 1.000 m distant from the lead emiting point, in the N, S, E, and W directions, at depths of 0-5, 5-10, 10-20, 20-40 and 0-20 cm. Samples were treated separately with DTPA and Mehlich-3 solutions for the Pb extraction. The highest Pb concentrations were found in the soil samples collected close to the source of contamination. The results obtained using DTPA and Mehlich-3 solutions showed clearly that the lead tends to accumulate in the surface ground layer, decreasing with the soil depth. This indicated that the procedures using either DTPA or Mehlich-3 solutions as Pb extractor from soils should be also considered as appropriate for environmental monitoring.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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