Major aspects of the mercury cycle in the Negro River Basin, Amazon

Detalhes bibliográficos
Autor(a) principal: Silva,Gilmar Silvério da
Data de Publicação: 2009
Outros Autores: Bisinoti,Márcia Cristina, Fadini,Pedro Sérgio, Magarelli,Gabriela, Jardim,Wilson F., Fostier,Anne Hélène
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=S0103-50532009000600019
Resumo: Despite the low level of industrial activity and human density, Hg concentration in the Negro River basin is relatively high. Soil enriched with naturally high Hg concentrations and atmospheric deposition are the main sources of the metal in this watershed. Differences between invasive and evasive fluxes at the water/air and soil/air interfaces indicate Hg accumulation in the basin at a rate of 39.9 t y-1. The type of soil, which is the main source of mercury for the water bodies, the hydrological cycle with floods and dry periods, act markedly on the water redox chemistry. A complex interaction between many seasonable variables such as solar intensity, water pH, age of the naturally occurring organic matter and the hydrological cycle alter the redox characteristics of these black water bodies, thus markedly affecting the consumption of Hg0 and the degradation of methylmercury present in the water. Although methylation is favored in black waters, photodegradation counterpoints this formation, thus regulating the methylmercury burden in the water column.
id SBQ-2_302510e9799cd2938247156f5bcbf482
oai_identifier_str oai:scielo:S0103-50532009000600019
network_acronym_str SBQ-2
network_name_str Journal of the Brazilian Chemical Society (Online)
repository_id_str
spelling Major aspects of the mercury cycle in the Negro River Basin, AmazonNegro Rivermercury fluxesmercury speciesblack watersDespite the low level of industrial activity and human density, Hg concentration in the Negro River basin is relatively high. Soil enriched with naturally high Hg concentrations and atmospheric deposition are the main sources of the metal in this watershed. Differences between invasive and evasive fluxes at the water/air and soil/air interfaces indicate Hg accumulation in the basin at a rate of 39.9 t y-1. The type of soil, which is the main source of mercury for the water bodies, the hydrological cycle with floods and dry periods, act markedly on the water redox chemistry. A complex interaction between many seasonable variables such as solar intensity, water pH, age of the naturally occurring organic matter and the hydrological cycle alter the redox characteristics of these black water bodies, thus markedly affecting the consumption of Hg0 and the degradation of methylmercury present in the water. Although methylation is favored in black waters, photodegradation counterpoints this formation, thus regulating the methylmercury burden in the water column.Sociedade Brasileira de Química2009-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532009000600019Journal of the Brazilian Chemical Society v.20 n.6 2009reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0103-50532009000600019info:eu-repo/semantics/openAccessSilva,Gilmar Silvério daBisinoti,Márcia CristinaFadini,Pedro SérgioMagarelli,GabrielaJardim,Wilson F.Fostier,Anne Hélèneeng2009-08-04T00:00:00Zoai:scielo:S0103-50532009000600019Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2009-08-04T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv Major aspects of the mercury cycle in the Negro River Basin, Amazon
title Major aspects of the mercury cycle in the Negro River Basin, Amazon
spellingShingle Major aspects of the mercury cycle in the Negro River Basin, Amazon
Silva,Gilmar Silvério da
Negro River
mercury fluxes
mercury species
black waters
title_short Major aspects of the mercury cycle in the Negro River Basin, Amazon
title_full Major aspects of the mercury cycle in the Negro River Basin, Amazon
title_fullStr Major aspects of the mercury cycle in the Negro River Basin, Amazon
title_full_unstemmed Major aspects of the mercury cycle in the Negro River Basin, Amazon
title_sort Major aspects of the mercury cycle in the Negro River Basin, Amazon
author Silva,Gilmar Silvério da
author_facet Silva,Gilmar Silvério da
Bisinoti,Márcia Cristina
Fadini,Pedro Sérgio
Magarelli,Gabriela
Jardim,Wilson F.
Fostier,Anne Hélène
author_role author
author2 Bisinoti,Márcia Cristina
Fadini,Pedro Sérgio
Magarelli,Gabriela
Jardim,Wilson F.
Fostier,Anne Hélène
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Silva,Gilmar Silvério da
Bisinoti,Márcia Cristina
Fadini,Pedro Sérgio
Magarelli,Gabriela
Jardim,Wilson F.
Fostier,Anne Hélène
dc.subject.por.fl_str_mv Negro River
mercury fluxes
mercury species
black waters
topic Negro River
mercury fluxes
mercury species
black waters
description Despite the low level of industrial activity and human density, Hg concentration in the Negro River basin is relatively high. Soil enriched with naturally high Hg concentrations and atmospheric deposition are the main sources of the metal in this watershed. Differences between invasive and evasive fluxes at the water/air and soil/air interfaces indicate Hg accumulation in the basin at a rate of 39.9 t y-1. The type of soil, which is the main source of mercury for the water bodies, the hydrological cycle with floods and dry periods, act markedly on the water redox chemistry. A complex interaction between many seasonable variables such as solar intensity, water pH, age of the naturally occurring organic matter and the hydrological cycle alter the redox characteristics of these black water bodies, thus markedly affecting the consumption of Hg0 and the degradation of methylmercury present in the water. Although methylation is favored in black waters, photodegradation counterpoints this formation, thus regulating the methylmercury burden in the water column.
publishDate 2009
dc.date.none.fl_str_mv 2009-01-01
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=S0103-50532009000600019
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532009000600019
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0103-50532009000600019
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.20 n.6 2009
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_ 1750318169907527680