Organic matter composition related to methane ebullitive flux of an urban coastal lagoon, Southeastern Brazil
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Química Nova (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422019004600619 |
Resumo: | In 2016, Brazil emitted 18.25 Tg of methane. Some of these emissions occur through continental aquatic ecosystems, locations of fate and accumulation of organic and inorganic matter. Thus, the aim of this study is to evaluate the origin of organic matter in Rodrigo de Freitas Lagoon, an eutrophic, coastal and chocked lagoon in Rio de Janeiro, Brazil, through the determination of n-alkanes and sterols compounds in the upper two centimeters of sediment and compare these data with methane ebullitive flux. The concentrations of n-alkanes varied between 2.43 and 25.82 µg g-1. C29 was predominant compound in most sites, but also with important petrogenic source evidenced by the occurrence of Unresolved Complex Misture. The total concentration of sterols ranged from 2.76 to 56.01 µg g-1. β-sitostanol was the most abundant compound and coprostanol was the most relevant at the sites under influence of domestic effluents. CH4 ebullitive flux averaged 199 mg m-2 d-1 in the dry period and 9.3 mg m-2 d-1 during the wet season. We conclude that the organic matter reaching Rodrigo de Freitas Lagoon through the rivers discharge added or enriched with irregular sewage input and petroleum derivates are the main source of eutrophication and generate higher methane emissions to the atmosphere. |
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Organic matter composition related to methane ebullitive flux of an urban coastal lagoon, Southeastern Braziln-alkanessterolsmethaneebullitive fluxcoastal lagoonIn 2016, Brazil emitted 18.25 Tg of methane. Some of these emissions occur through continental aquatic ecosystems, locations of fate and accumulation of organic and inorganic matter. Thus, the aim of this study is to evaluate the origin of organic matter in Rodrigo de Freitas Lagoon, an eutrophic, coastal and chocked lagoon in Rio de Janeiro, Brazil, through the determination of n-alkanes and sterols compounds in the upper two centimeters of sediment and compare these data with methane ebullitive flux. The concentrations of n-alkanes varied between 2.43 and 25.82 µg g-1. C29 was predominant compound in most sites, but also with important petrogenic source evidenced by the occurrence of Unresolved Complex Misture. The total concentration of sterols ranged from 2.76 to 56.01 µg g-1. β-sitostanol was the most abundant compound and coprostanol was the most relevant at the sites under influence of domestic effluents. CH4 ebullitive flux averaged 199 mg m-2 d-1 in the dry period and 9.3 mg m-2 d-1 during the wet season. We conclude that the organic matter reaching Rodrigo de Freitas Lagoon through the rivers discharge added or enriched with irregular sewage input and petroleum derivates are the main source of eutrophication and generate higher methane emissions to the atmosphere.Sociedade Brasileira de Química2019-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422019004600619Química Nova v.42 n.6 2019reponame:Química Nova (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.21577/0100-4042.20170373info:eu-repo/semantics/openAccessViana,Alessandra da FonsecaSantos,Marco Aurélio dosBernardes,Marcelo CorrêaAmorim,Marceloeng2019-08-12T00:00:00Zoai:scielo:S0100-40422019004600619Revistahttps://www.scielo.br/j/qn/ONGhttps://old.scielo.br/oai/scielo-oai.phpquimicanova@sbq.org.br1678-70640100-4042opendoar:2019-08-12T00:00Química Nova (Online) - Sociedade Brasileira de Química (SBQ)false |
dc.title.none.fl_str_mv |
Organic matter composition related to methane ebullitive flux of an urban coastal lagoon, Southeastern Brazil |
title |
Organic matter composition related to methane ebullitive flux of an urban coastal lagoon, Southeastern Brazil |
spellingShingle |
Organic matter composition related to methane ebullitive flux of an urban coastal lagoon, Southeastern Brazil Viana,Alessandra da Fonseca n-alkanes sterols methane ebullitive flux coastal lagoon |
title_short |
Organic matter composition related to methane ebullitive flux of an urban coastal lagoon, Southeastern Brazil |
title_full |
Organic matter composition related to methane ebullitive flux of an urban coastal lagoon, Southeastern Brazil |
title_fullStr |
Organic matter composition related to methane ebullitive flux of an urban coastal lagoon, Southeastern Brazil |
title_full_unstemmed |
Organic matter composition related to methane ebullitive flux of an urban coastal lagoon, Southeastern Brazil |
title_sort |
Organic matter composition related to methane ebullitive flux of an urban coastal lagoon, Southeastern Brazil |
author |
Viana,Alessandra da Fonseca |
author_facet |
Viana,Alessandra da Fonseca Santos,Marco Aurélio dos Bernardes,Marcelo Corrêa Amorim,Marcelo |
author_role |
author |
author2 |
Santos,Marco Aurélio dos Bernardes,Marcelo Corrêa Amorim,Marcelo |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Viana,Alessandra da Fonseca Santos,Marco Aurélio dos Bernardes,Marcelo Corrêa Amorim,Marcelo |
dc.subject.por.fl_str_mv |
n-alkanes sterols methane ebullitive flux coastal lagoon |
topic |
n-alkanes sterols methane ebullitive flux coastal lagoon |
description |
In 2016, Brazil emitted 18.25 Tg of methane. Some of these emissions occur through continental aquatic ecosystems, locations of fate and accumulation of organic and inorganic matter. Thus, the aim of this study is to evaluate the origin of organic matter in Rodrigo de Freitas Lagoon, an eutrophic, coastal and chocked lagoon in Rio de Janeiro, Brazil, through the determination of n-alkanes and sterols compounds in the upper two centimeters of sediment and compare these data with methane ebullitive flux. The concentrations of n-alkanes varied between 2.43 and 25.82 µg g-1. C29 was predominant compound in most sites, but also with important petrogenic source evidenced by the occurrence of Unresolved Complex Misture. The total concentration of sterols ranged from 2.76 to 56.01 µg g-1. β-sitostanol was the most abundant compound and coprostanol was the most relevant at the sites under influence of domestic effluents. CH4 ebullitive flux averaged 199 mg m-2 d-1 in the dry period and 9.3 mg m-2 d-1 during the wet season. We conclude that the organic matter reaching Rodrigo de Freitas Lagoon through the rivers discharge added or enriched with irregular sewage input and petroleum derivates are the main source of eutrophication and generate higher methane emissions to the atmosphere. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-06-01 |
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=S0100-40422019004600619 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422019004600619 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.21577/0100-4042.20170373 |
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 |
Química Nova v.42 n.6 2019 reponame:Química Nova (Online) instname:Sociedade Brasileira de Química (SBQ) instacron:SBQ |
instname_str |
Sociedade Brasileira de Química (SBQ) |
instacron_str |
SBQ |
institution |
SBQ |
reponame_str |
Química Nova (Online) |
collection |
Química Nova (Online) |
repository.name.fl_str_mv |
Química Nova (Online) - Sociedade Brasileira de Química (SBQ) |
repository.mail.fl_str_mv |
quimicanova@sbq.org.br |
_version_ |
1750318119685980160 |