The effects of solar irradiation on copper speciation and organic complexation
Autor(a) principal: | |
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Data de Publicação: | 2011 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Journal of the Brazilian Chemical Society (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532011000900011 |
Resumo: | The aims of this research were to evaluate the effects of solar irradiation on copper speciation in water samples obtained in eutrophic and metal contaminated reservoir. Anodic stripping voltammetry and ion selective electrode were used for metal determinations of solar irradiated and non-irradiated samples. The results showed that after 7 h of solar irradiation, dissolved organic matter (DOM) was degraded promoting the increase of labile, free Cu2+ ions and dissolved inorganic carbon (DIC). Decreases of ligand concentration (C L) and dissolved organic carbon (DOC) were also observed. Conditional stability constant (logK') values varied for two sampling sites, but remained unchanged for the others. The present results demonstrated that photochemical reactions affected copper speciation and Cu-DOM interactions. This research is a contribution to the understanding of biogeochemical cycle of copper and highlights some ecological implications of photooxidation in freshwater ecosystems, such as the increase of copper bioavailability. |
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Journal of the Brazilian Chemical Society (Online) |
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The effects of solar irradiation on copper speciation and organic complexationcopperfreshwaterphotooxidationspeciationcomplexationThe aims of this research were to evaluate the effects of solar irradiation on copper speciation in water samples obtained in eutrophic and metal contaminated reservoir. Anodic stripping voltammetry and ion selective electrode were used for metal determinations of solar irradiated and non-irradiated samples. The results showed that after 7 h of solar irradiation, dissolved organic matter (DOM) was degraded promoting the increase of labile, free Cu2+ ions and dissolved inorganic carbon (DIC). Decreases of ligand concentration (C L) and dissolved organic carbon (DOC) were also observed. Conditional stability constant (logK') values varied for two sampling sites, but remained unchanged for the others. The present results demonstrated that photochemical reactions affected copper speciation and Cu-DOM interactions. This research is a contribution to the understanding of biogeochemical cycle of copper and highlights some ecological implications of photooxidation in freshwater ecosystems, such as the increase of copper bioavailability.Sociedade Brasileira de Química2011-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532011000900011Journal of the Brazilian Chemical Society v.22 n.9 2011reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0103-50532011000900011info:eu-repo/semantics/openAccessTonietto,Alessandra ELombardi,Ana TeresaVieira,Armando A. Heng2011-09-20T00:00:00Zoai:scielo:S0103-50532011000900011Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2011-09-20T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false |
dc.title.none.fl_str_mv |
The effects of solar irradiation on copper speciation and organic complexation |
title |
The effects of solar irradiation on copper speciation and organic complexation |
spellingShingle |
The effects of solar irradiation on copper speciation and organic complexation Tonietto,Alessandra E copper freshwater photooxidation speciation complexation |
title_short |
The effects of solar irradiation on copper speciation and organic complexation |
title_full |
The effects of solar irradiation on copper speciation and organic complexation |
title_fullStr |
The effects of solar irradiation on copper speciation and organic complexation |
title_full_unstemmed |
The effects of solar irradiation on copper speciation and organic complexation |
title_sort |
The effects of solar irradiation on copper speciation and organic complexation |
author |
Tonietto,Alessandra E |
author_facet |
Tonietto,Alessandra E Lombardi,Ana Teresa Vieira,Armando A. H |
author_role |
author |
author2 |
Lombardi,Ana Teresa Vieira,Armando A. H |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Tonietto,Alessandra E Lombardi,Ana Teresa Vieira,Armando A. H |
dc.subject.por.fl_str_mv |
copper freshwater photooxidation speciation complexation |
topic |
copper freshwater photooxidation speciation complexation |
description |
The aims of this research were to evaluate the effects of solar irradiation on copper speciation in water samples obtained in eutrophic and metal contaminated reservoir. Anodic stripping voltammetry and ion selective electrode were used for metal determinations of solar irradiated and non-irradiated samples. The results showed that after 7 h of solar irradiation, dissolved organic matter (DOM) was degraded promoting the increase of labile, free Cu2+ ions and dissolved inorganic carbon (DIC). Decreases of ligand concentration (C L) and dissolved organic carbon (DOC) were also observed. Conditional stability constant (logK') values varied for two sampling sites, but remained unchanged for the others. The present results demonstrated that photochemical reactions affected copper speciation and Cu-DOM interactions. This research is a contribution to the understanding of biogeochemical cycle of copper and highlights some ecological implications of photooxidation in freshwater ecosystems, such as the increase of copper bioavailability. |
publishDate |
2011 |
dc.date.none.fl_str_mv |
2011-09-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532011000900011 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532011000900011 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0103-50532011000900011 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Química |
publisher.none.fl_str_mv |
Sociedade Brasileira de Química |
dc.source.none.fl_str_mv |
Journal of the Brazilian Chemical Society v.22 n.9 2011 reponame:Journal of the Brazilian Chemical Society (Online) instname:Sociedade Brasileira de Química (SBQ) instacron:SBQ |
instname_str |
Sociedade Brasileira de Química (SBQ) |
instacron_str |
SBQ |
institution |
SBQ |
reponame_str |
Journal of the Brazilian Chemical Society (Online) |
collection |
Journal of the Brazilian Chemical Society (Online) |
repository.name.fl_str_mv |
Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ) |
repository.mail.fl_str_mv |
||office@jbcs.sbq.org.br |
_version_ |
1750318172653748224 |