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| Author(s): |
Marina Midori Fukumoto
Total Authors: 1
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| Document type: | Doctoral Thesis |
| Press: | São Paulo. |
| Institution: | Universidade de São Paulo (USP). Instituto Oceanográfico (IO/DIDC) |
| Defense date: | 2007-09-27 |
| Examining board members: |
Michel Michaelovitch de Mahiques;
Marcia Caruso Bicego;
Déborah Inês Teixeira Fávaro;
César de Castro Martins;
Sonia Maria Barros de Oliveira
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| Advisor: | Michel Michaelovitch de Mahiques; Rubens Cesar Lopes Figueira |
| Abstract | |
The Santos and São Vicente Estuary, located in the central portion of the coast of São Paulo state, has the most important industrial area of Brazilian coast, the Cubatão industrial complex, and the largest Brazilian harbour, the Santos harbour. The aims of this work were the study of the contamination history of the area by heavy metals and the applicability of magnetic susceptibility to detect geochemical anomalies. Three sediment cores were collected near polluted sites. The sedimentation rate was determined by 137Cs method, magnetic susceptibility was measured by a Bartington MS2C sensor and metal contents was analyzed by ICP-OES. Pb, Cu, Cr and Zn contents presented high values near the top of the cores. The highest values don?t occur in the surface, but in some centimeters of depth. The correlation between Pb, Cu, and Zn contents and magnetic susceptibility shows the applicability of magnetic susceptibility in the preliminary evaluation of sediment quality. The input of these metals can be associated to different anthropic sources, linked to urban and industrial development of the area: industrial and harbour activities and irregular waste and sewage disposal. (AU) | |