Influence of Aveiro Lagoon heavy metal contents in the adjacent continental shelf (Portugal)
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| Format: | Artículo científico |
| Sprache: | en |
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Universidad Autónoma de Baja California
2005
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| _version_ | 1876482771351764992 |
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| author | I. Abrantes |
| author_facet | I. Abrantes |
| contents | Influence of Aveiro Lagoon heavy metal contents in the adjacent continental shelf (Portugal) I. Abrantes J. Vidinha F. Rocha J.A. Dias Ciencias de la Tierra sediments heavy metals Aveiro Lagoon continental shelf multivariate statistical analysis A chemical analysis of Al, Ca, Fe, Mg, Cu, Pb, Zn, Cr, Co, Ni and Cd was carried out in 22 surface sediment samples of thecontinental shelf and upper slope between Espinho and Aveiro (Portugal). To reduce the disturbing effects of grain size, allsamples were size-normalized by wet sieving (<63 µm). The fine fraction was digested with concentrated acids and analyzed byflame atomic absorption spectrometry. The Al and heavy metal concentrations displayed a similar distribution pattern, decreasingseaward. Exceptions to this general pattern are Ca, Mg and Pb distributions. The Ca contents are related to carbonated biogenicparticles that are very abundant in the outer shelf. Multivariate statistical analysis was applied to all data to assess the behaviourand sources of each element analyzed. The results from factor analysis showed that terrigenous supply (from Aveiro Lagoon flow,coastal erosion and littoral drift), grain size (clay) sorting and anthropogenic influences from Aveiro Lagoon are the major factorscontrolling spatial variations of chemical elements in the continental shelf between Espinho and Aveiro. Unusually high contentsof Pb were found in the middle shelf off Furadouro, but we could not determine the possible source of this contamination. 2005 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48003103 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.1B Vol.31 |
| format | Artículo científico |
| id | redalyc_48003103 |
| institution | Redalyc |
| language | en |
| publishDate | 2005 |
| publisher | Universidad Autónoma de Baja California |
| spellingShingle | Influence of Aveiro Lagoon heavy metal contents in the adjacent continental shelf (Portugal) I. Abrantes Ciencias de la Tierra sediments heavy metals Aveiro Lagoon continental shelf multivariate statistical analysis Influence of Aveiro Lagoon heavy metal contents in the adjacent continental shelf (Portugal) I. Abrantes J. Vidinha F. Rocha J.A. Dias Ciencias de la Tierra sediments heavy metals Aveiro Lagoon continental shelf multivariate statistical analysis A chemical analysis of Al, Ca, Fe, Mg, Cu, Pb, Zn, Cr, Co, Ni and Cd was carried out in 22 surface sediment samples of thecontinental shelf and upper slope between Espinho and Aveiro (Portugal). To reduce the disturbing effects of grain size, allsamples were size-normalized by wet sieving (<63 µm). The fine fraction was digested with concentrated acids and analyzed byflame atomic absorption spectrometry. The Al and heavy metal concentrations displayed a similar distribution pattern, decreasingseaward. Exceptions to this general pattern are Ca, Mg and Pb distributions. The Ca contents are related to carbonated biogenicparticles that are very abundant in the outer shelf. Multivariate statistical analysis was applied to all data to assess the behaviourand sources of each element analyzed. The results from factor analysis showed that terrigenous supply (from Aveiro Lagoon flow,coastal erosion and littoral drift), grain size (clay) sorting and anthropogenic influences from Aveiro Lagoon are the major factorscontrolling spatial variations of chemical elements in the continental shelf between Espinho and Aveiro. Unusually high contentsof Pb were found in the middle shelf off Furadouro, but we could not determine the possible source of this contamination. 2005 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48003103 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.1B Vol.31 |
| title | Influence of Aveiro Lagoon heavy metal contents in the adjacent continental shelf (Portugal) |
| topic | Ciencias de la Tierra sediments heavy metals Aveiro Lagoon continental shelf multivariate statistical analysis |
| url | https://www.redalyc.org/articulo.oa?id=48003103 |