Reconstructing historical changes in combustion patterns by means of black carbon and pah evaluation in dated sediments from Guanabara Bay, Rio de Janeiro
Autor(a) principal: | |
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Data de Publicação: | 2013 |
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=S0103-50532013001100014 |
Resumo: | The accumulation history of combustion products from the metropolitan area around Guanabara Bay was evaluated using black carbon and polycyclic aromatic hydrocarbons as indicators. BC concentration varied between 0.23 and 0.51%, with an increasing mass accumulation tendency over the last 118 years, whereas a decrease in the values of the ratio BC/organic carbon was observed in the upper sediment layers, probably reflecting the enhancement of bay's eutrophication process in the last 30 years. Higher concentrations of pyrolytic PAH were observed between 1925 and 1976, being consistent with the subsequent deforestation, urbanization, and industrialization that occurred in the Guanabara basin in the period. These PAHs were best characterized by the BFl/(BFl+BePy) diagnostic ratio. The data obtained allowed the characterization of the main events that influenced the combustion patterns in the region: burning of biomass and fossil fuel, economic crisis of 1970 and 1990 and the introduction of ethanol in the Brazilian energetic matrix. |
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Reconstructing historical changes in combustion patterns by means of black carbon and pah evaluation in dated sediments from Guanabara Bay, Rio de Janeiroblack carbonPAHgeochronology13C NMRSEM/EDXThe accumulation history of combustion products from the metropolitan area around Guanabara Bay was evaluated using black carbon and polycyclic aromatic hydrocarbons as indicators. BC concentration varied between 0.23 and 0.51%, with an increasing mass accumulation tendency over the last 118 years, whereas a decrease in the values of the ratio BC/organic carbon was observed in the upper sediment layers, probably reflecting the enhancement of bay's eutrophication process in the last 30 years. Higher concentrations of pyrolytic PAH were observed between 1925 and 1976, being consistent with the subsequent deforestation, urbanization, and industrialization that occurred in the Guanabara basin in the period. These PAHs were best characterized by the BFl/(BFl+BePy) diagnostic ratio. The data obtained allowed the characterization of the main events that influenced the combustion patterns in the region: burning of biomass and fossil fuel, economic crisis of 1970 and 1990 and the introduction of ethanol in the Brazilian energetic matrix.Sociedade Brasileira de Química2013-11-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532013001100014Journal of the Brazilian Chemical Society v.24 n.11 2013reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.5935/0103-5053.20130227info:eu-repo/semantics/openAccessMauad,Cristiane R.Wagener,Angela de L. R.Farias,Cássia de O.Ruiz,Naira M. S.Carreira,Renato S.Vasconcelos,CrisógonoGodoy,José M.Menezes,Sonia M. C. deScofield,Arthur de L.eng2013-11-19T00:00:00Zoai:scielo:S0103-50532013001100014Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2013-11-19T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false |
dc.title.none.fl_str_mv |
Reconstructing historical changes in combustion patterns by means of black carbon and pah evaluation in dated sediments from Guanabara Bay, Rio de Janeiro |
title |
Reconstructing historical changes in combustion patterns by means of black carbon and pah evaluation in dated sediments from Guanabara Bay, Rio de Janeiro |
spellingShingle |
Reconstructing historical changes in combustion patterns by means of black carbon and pah evaluation in dated sediments from Guanabara Bay, Rio de Janeiro Mauad,Cristiane R. black carbon PAH geochronology 13C NMR SEM/EDX |
title_short |
Reconstructing historical changes in combustion patterns by means of black carbon and pah evaluation in dated sediments from Guanabara Bay, Rio de Janeiro |
title_full |
Reconstructing historical changes in combustion patterns by means of black carbon and pah evaluation in dated sediments from Guanabara Bay, Rio de Janeiro |
title_fullStr |
Reconstructing historical changes in combustion patterns by means of black carbon and pah evaluation in dated sediments from Guanabara Bay, Rio de Janeiro |
title_full_unstemmed |
Reconstructing historical changes in combustion patterns by means of black carbon and pah evaluation in dated sediments from Guanabara Bay, Rio de Janeiro |
title_sort |
Reconstructing historical changes in combustion patterns by means of black carbon and pah evaluation in dated sediments from Guanabara Bay, Rio de Janeiro |
author |
Mauad,Cristiane R. |
author_facet |
Mauad,Cristiane R. Wagener,Angela de L. R. Farias,Cássia de O. Ruiz,Naira M. S. Carreira,Renato S. Vasconcelos,Crisógono Godoy,José M. Menezes,Sonia M. C. de Scofield,Arthur de L. |
author_role |
author |
author2 |
Wagener,Angela de L. R. Farias,Cássia de O. Ruiz,Naira M. S. Carreira,Renato S. Vasconcelos,Crisógono Godoy,José M. Menezes,Sonia M. C. de Scofield,Arthur de L. |
author2_role |
author author author author author author author author |
dc.contributor.author.fl_str_mv |
Mauad,Cristiane R. Wagener,Angela de L. R. Farias,Cássia de O. Ruiz,Naira M. S. Carreira,Renato S. Vasconcelos,Crisógono Godoy,José M. Menezes,Sonia M. C. de Scofield,Arthur de L. |
dc.subject.por.fl_str_mv |
black carbon PAH geochronology 13C NMR SEM/EDX |
topic |
black carbon PAH geochronology 13C NMR SEM/EDX |
description |
The accumulation history of combustion products from the metropolitan area around Guanabara Bay was evaluated using black carbon and polycyclic aromatic hydrocarbons as indicators. BC concentration varied between 0.23 and 0.51%, with an increasing mass accumulation tendency over the last 118 years, whereas a decrease in the values of the ratio BC/organic carbon was observed in the upper sediment layers, probably reflecting the enhancement of bay's eutrophication process in the last 30 years. Higher concentrations of pyrolytic PAH were observed between 1925 and 1976, being consistent with the subsequent deforestation, urbanization, and industrialization that occurred in the Guanabara basin in the period. These PAHs were best characterized by the BFl/(BFl+BePy) diagnostic ratio. The data obtained allowed the characterization of the main events that influenced the combustion patterns in the region: burning of biomass and fossil fuel, economic crisis of 1970 and 1990 and the introduction of ethanol in the Brazilian energetic matrix. |
publishDate |
2013 |
dc.date.none.fl_str_mv |
2013-11-01 |
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=S0103-50532013001100014 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532013001100014 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.5935/0103-5053.20130227 |
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.24 n.11 2013 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_ |
1750318175329714176 |