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metadata.dc.type: | Artigo de Periódico |
Título : | Assessment of contamination by trace metals and petroleum hydrocarbons in sediments from the tropical estuary of Todos os Santos Bay, Brazil |
Otros títulos : | Revista Brasileira de Geociências |
Autor : | Celino, Joil José Oliveira, Olívia Maria Cordeiro de Hadlich, Gisele Mara Queiroz, Antônio Fernando de Souza Garcia, Karina Santos |
metadata.dc.creator: | Celino, Joil José Oliveira, Olívia Maria Cordeiro de Hadlich, Gisele Mara Queiroz, Antônio Fernando de Souza Garcia, Karina Santos |
Resumen : | As part of the environmental assessment within Todos os Santos Bay, State of Bahia - Brazil, in summer of 2005, superficial water and sediments samples of the mangrove were collected at five locations to determine the spatial distribution of anthropogenic pollutants in the Dom Joao estuary at the Sao Francisco do Conde Region. Sandy sediments with low organic matter content dominate the studied area. Trace metal levels indicated that sediments were moderately polluted with Cu (overall mean: 21.48 +/- 4.76 ƒÊg.g- 1 dry sediment), but not with Pb (15 +/- 8), Zn (38 +/- 10), Cr (15 +/- 7), Ni (13 +/- 6) and Cd (0.4 +/- 0.2). Depending on location, total petroleum hydrocarbons ranged from 1.6 to 10.6 ƒÊg.g- 1. To discriminate pattern differences and similarities among samples, principal component analysis (PCA) was performed using a correlation matrix. PCA revealed the latent relationships among all the stations investigated and confirmed our analytical results. Principal components analysis confirmed two regions according to their environmental quality. The results pointed out that almost all the area presented some substances that can cause adverse biological effects, especially in the outermost region where some metals are above TEL level. |
Palabras clave : | Environmental assessment. Hydrocarbon. Metals. Sediments. Mangrove. Todos os Santos Bay. Avaliação ambiental. Hidrocarbonetos. Metais. Sediments. manguezais. Baía de Todos os Santos. |
URI : | http://www.repositorio.ufba.br/ri/handle/ri/2643 |
Fecha de publicación : | 2008 |
Aparece en las colecciones: | Artigo Publicado em Periódico (IGEO) |
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