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Please use this identifier to cite or link to this item: http://repositorio.ufba.br/ri/handle/ri/2643

Title: Assessment of contamination by trace metals and petroleum hydrocarbons in sediments from the tropical estuary of Todos os Santos Bay, Brazil
Other Titles: Revista Brasileira de Geociências
Authors: Celino, Joil José
Oliveira, Olívia Maria Cordeiro de
Hadlich, Gisele Mara
Queiroz, Antônio Fernando de Souza
Garcia, Karina Santos
Keywords: Environmental assessment. Hydrocarbon. Metals. Sediments. Mangrove. Todos os Santos Bay.;Avaliação ambiental. Hidrocarbonetos. Metais. Sediments. manguezais. Baía de Todos os Santos.
Issue Date: Nov-2008
Abstract: 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.
Description: p. 753-760
URI: http://www.repositorio.ufba.br/ri/handle/ri/2643
ISSN: 2177-4382
Appears in Collections:Artigos Publicados em Periódicos (IGEO)

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