Storage and export of mercury from a contaminated bay (Ria de Aveiro, Portugal)
Autor(a) principal: | |
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Data de Publicação: | 2001 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10198/3899 |
Resumo: | Mercury has been determined in water, suspended particulate matter (SPM) and sediments (solid fraction and pore water) collected in a heavily contaminated confined area (Largo do Laranjo) of the Ria de Aveiro. Mercury has been analysed in seabass (Dicentrarchus labrax) captured in several locations of the lagoon. The levels of mercury in water and SPM in the contaminated sampled places fluctuated daily with the tide (from 10 to 53 ng.dm-3 and 3.5 to 26 ug.g-1, respectively), indicating the export at the tidal rhythm. Bottom sediments exhibited higher concentrations, the maximum (48 ug.g-1) occurring near the anthropogenic source at depths corresponding to the periods of higher industrial discharges. Mercury concentrations in pore waters (max. 80 ng.dm-3) exceed the values found in the water column and were higher at depths where Acid Volatile Sulphides (AVS) presented broad maximums. This implies a remobilization at anoxic conditions. However, the export across the sediment-water interface predicted through molecular diffusion is low (between 1 to 4 x 10-3 ng.cm-2.h-1) in comparison to the industrial input. The anthropogenic mercury appears to be rapidly accumulated in seabass, a predator fish that enter seasonally in Largo do Laranjo. |
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Storage and export of mercury from a contaminated bay (Ria de Aveiro, Portugal)FishesMercuryPore waterSalt marshesSedimentsMercury has been determined in water, suspended particulate matter (SPM) and sediments (solid fraction and pore water) collected in a heavily contaminated confined area (Largo do Laranjo) of the Ria de Aveiro. Mercury has been analysed in seabass (Dicentrarchus labrax) captured in several locations of the lagoon. The levels of mercury in water and SPM in the contaminated sampled places fluctuated daily with the tide (from 10 to 53 ng.dm-3 and 3.5 to 26 ug.g-1, respectively), indicating the export at the tidal rhythm. Bottom sediments exhibited higher concentrations, the maximum (48 ug.g-1) occurring near the anthropogenic source at depths corresponding to the periods of higher industrial discharges. Mercury concentrations in pore waters (max. 80 ng.dm-3) exceed the values found in the water column and were higher at depths where Acid Volatile Sulphides (AVS) presented broad maximums. This implies a remobilization at anoxic conditions. However, the export across the sediment-water interface predicted through molecular diffusion is low (between 1 to 4 x 10-3 ng.cm-2.h-1) in comparison to the industrial input. The anthropogenic mercury appears to be rapidly accumulated in seabass, a predator fish that enter seasonally in Largo do Laranjo.Kluwer Academic PublishersBiblioteca Digital do IPBRamalhosa, ElsaMonterroso, PauloAbreu, SizenandoPereira, EduardaVale, CarlosDuarte, Armando2011-04-01T14:33:49Z20012001-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10198/3899engRamalhosa, Elsa; Monterroso, Paulo; Abreu, Sizenando; Pereira, Eduarda; Vale, Carlos; Duarte, Armando (2001). Storage and export of mercury from a contaminated bay (Ria de Aveiro, Portugal). Wetlands Ecology and Management. ISSN 0923-4861. 9:4, p. 311-3160923-4861info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-01-16T12:07:05ZPortal AgregadorONG |
dc.title.none.fl_str_mv |
Storage and export of mercury from a contaminated bay (Ria de Aveiro, Portugal) |
title |
Storage and export of mercury from a contaminated bay (Ria de Aveiro, Portugal) |
spellingShingle |
Storage and export of mercury from a contaminated bay (Ria de Aveiro, Portugal) Ramalhosa, Elsa Fishes Mercury Pore water Salt marshes Sediments |
title_short |
Storage and export of mercury from a contaminated bay (Ria de Aveiro, Portugal) |
title_full |
Storage and export of mercury from a contaminated bay (Ria de Aveiro, Portugal) |
title_fullStr |
Storage and export of mercury from a contaminated bay (Ria de Aveiro, Portugal) |
title_full_unstemmed |
Storage and export of mercury from a contaminated bay (Ria de Aveiro, Portugal) |
title_sort |
Storage and export of mercury from a contaminated bay (Ria de Aveiro, Portugal) |
author |
Ramalhosa, Elsa |
author_facet |
Ramalhosa, Elsa Monterroso, Paulo Abreu, Sizenando Pereira, Eduarda Vale, Carlos Duarte, Armando |
author_role |
author |
author2 |
Monterroso, Paulo Abreu, Sizenando Pereira, Eduarda Vale, Carlos Duarte, Armando |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Biblioteca Digital do IPB |
dc.contributor.author.fl_str_mv |
Ramalhosa, Elsa Monterroso, Paulo Abreu, Sizenando Pereira, Eduarda Vale, Carlos Duarte, Armando |
dc.subject.por.fl_str_mv |
Fishes Mercury Pore water Salt marshes Sediments |
topic |
Fishes Mercury Pore water Salt marshes Sediments |
description |
Mercury has been determined in water, suspended particulate matter (SPM) and sediments (solid fraction and pore water) collected in a heavily contaminated confined area (Largo do Laranjo) of the Ria de Aveiro. Mercury has been analysed in seabass (Dicentrarchus labrax) captured in several locations of the lagoon. The levels of mercury in water and SPM in the contaminated sampled places fluctuated daily with the tide (from 10 to 53 ng.dm-3 and 3.5 to 26 ug.g-1, respectively), indicating the export at the tidal rhythm. Bottom sediments exhibited higher concentrations, the maximum (48 ug.g-1) occurring near the anthropogenic source at depths corresponding to the periods of higher industrial discharges. Mercury concentrations in pore waters (max. 80 ng.dm-3) exceed the values found in the water column and were higher at depths where Acid Volatile Sulphides (AVS) presented broad maximums. This implies a remobilization at anoxic conditions. However, the export across the sediment-water interface predicted through molecular diffusion is low (between 1 to 4 x 10-3 ng.cm-2.h-1) in comparison to the industrial input. The anthropogenic mercury appears to be rapidly accumulated in seabass, a predator fish that enter seasonally in Largo do Laranjo. |
publishDate |
2001 |
dc.date.none.fl_str_mv |
2001 2001-01-01T00:00:00Z 2011-04-01T14:33:49Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10198/3899 |
url |
http://hdl.handle.net/10198/3899 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Ramalhosa, Elsa; Monterroso, Paulo; Abreu, Sizenando; Pereira, Eduarda; Vale, Carlos; Duarte, Armando (2001). Storage and export of mercury from a contaminated bay (Ria de Aveiro, Portugal). Wetlands Ecology and Management. ISSN 0923-4861. 9:4, p. 311-316 0923-4861 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Kluwer Academic Publishers |
publisher.none.fl_str_mv |
Kluwer Academic Publishers |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
|
repository.mail.fl_str_mv |
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_version_ |
1777301812431290369 |