Effect of organic matter on determination of reactive mercury in contaminated waters

Detalhes bibliográficos
Autor(a) principal: Ramalhosa, Elsa
Data de Publicação: 2003
Outros Autores: Río-Segade, Susana, Pereira, Eduarda, Vale, Carlos, Duarte, Armando
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10198/3954
Resumo: Dissolved reactive mercury was determined in water samples from Ria da Aveiro, a coastal lagoon contaminated by mercury. Concentrations increased with acid dilution to a maximum of 193% in samples containing organic matter with high aromaticity, as inferred from absorbances at 250, 280 and 365 nm. Laboratory experiments with potassium hydrogenoftalate and humic acids solutions proved the influence of aromaticity in complexing mercury, how acid dilution protonates the aromatic Hg-complexes and consequent release of labile forms of mercury to solution. On the basis of these results it is proposed that natural waters from mercury contaminated ecosystems should be analysed without dilutions, otherwise additional studies should be performed to access the protonation of mercury organic complexes.
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spelling Effect of organic matter on determination of reactive mercury in contaminated watersReactive mercuryOrganic matterFlow injectionCold vapour atomic fluorescence spectrometryNatural watersDissolved reactive mercury was determined in water samples from Ria da Aveiro, a coastal lagoon contaminated by mercury. Concentrations increased with acid dilution to a maximum of 193% in samples containing organic matter with high aromaticity, as inferred from absorbances at 250, 280 and 365 nm. Laboratory experiments with potassium hydrogenoftalate and humic acids solutions proved the influence of aromaticity in complexing mercury, how acid dilution protonates the aromatic Hg-complexes and consequent release of labile forms of mercury to solution. On the basis of these results it is proposed that natural waters from mercury contaminated ecosystems should be analysed without dilutions, otherwise additional studies should be performed to access the protonation of mercury organic complexes.Taylor & FrancisBiblioteca Digital do IPBRamalhosa, ElsaRío-Segade, SusanaPereira, EduardaVale, CarlosDuarte, Armando2011-04-05T11:00:20Z20032003-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10198/3954engRamalhosa, Elsa; Río-Segade, Susana; Pereira, Eduarda; Vale, Carlos; Duarte, Armando (2003). Effect of organic matter on determination of reactive mercury in contaminated waters. International Journal of Environmental Analytical Chemistry. ISSN 0306-7319. 83:1,p. 81-880306-731910.1080/0306731021000053757info: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:RCAAP2023-11-21T10:09:37Zoai:bibliotecadigital.ipb.pt:10198/3954Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T22:56:31.605174Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Effect of organic matter on determination of reactive mercury in contaminated waters
title Effect of organic matter on determination of reactive mercury in contaminated waters
spellingShingle Effect of organic matter on determination of reactive mercury in contaminated waters
Ramalhosa, Elsa
Reactive mercury
Organic matter
Flow injection
Cold vapour atomic fluorescence spectrometry
Natural waters
title_short Effect of organic matter on determination of reactive mercury in contaminated waters
title_full Effect of organic matter on determination of reactive mercury in contaminated waters
title_fullStr Effect of organic matter on determination of reactive mercury in contaminated waters
title_full_unstemmed Effect of organic matter on determination of reactive mercury in contaminated waters
title_sort Effect of organic matter on determination of reactive mercury in contaminated waters
author Ramalhosa, Elsa
author_facet Ramalhosa, Elsa
Río-Segade, Susana
Pereira, Eduarda
Vale, Carlos
Duarte, Armando
author_role author
author2 Río-Segade, Susana
Pereira, Eduarda
Vale, Carlos
Duarte, Armando
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Biblioteca Digital do IPB
dc.contributor.author.fl_str_mv Ramalhosa, Elsa
Río-Segade, Susana
Pereira, Eduarda
Vale, Carlos
Duarte, Armando
dc.subject.por.fl_str_mv Reactive mercury
Organic matter
Flow injection
Cold vapour atomic fluorescence spectrometry
Natural waters
topic Reactive mercury
Organic matter
Flow injection
Cold vapour atomic fluorescence spectrometry
Natural waters
description Dissolved reactive mercury was determined in water samples from Ria da Aveiro, a coastal lagoon contaminated by mercury. Concentrations increased with acid dilution to a maximum of 193% in samples containing organic matter with high aromaticity, as inferred from absorbances at 250, 280 and 365 nm. Laboratory experiments with potassium hydrogenoftalate and humic acids solutions proved the influence of aromaticity in complexing mercury, how acid dilution protonates the aromatic Hg-complexes and consequent release of labile forms of mercury to solution. On the basis of these results it is proposed that natural waters from mercury contaminated ecosystems should be analysed without dilutions, otherwise additional studies should be performed to access the protonation of mercury organic complexes.
publishDate 2003
dc.date.none.fl_str_mv 2003
2003-01-01T00:00:00Z
2011-04-05T11:00:20Z
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/10198/3954
url http://hdl.handle.net/10198/3954
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Ramalhosa, Elsa; Río-Segade, Susana; Pereira, Eduarda; Vale, Carlos; Duarte, Armando (2003). Effect of organic matter on determination of reactive mercury in contaminated waters. International Journal of Environmental Analytical Chemistry. ISSN 0306-7319. 83:1,p. 81-88
0306-7319
10.1080/0306731021000053757
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 Taylor & Francis
publisher.none.fl_str_mv Taylor & Francis
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 Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
repository.mail.fl_str_mv
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