Fotodegradação de hidrocarbonetos policíclicos aromáticos em placas de sílica impregnadas com dióxido de titânio
Autor(a) principal: | |
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Data de Publicação: | 2005 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Química Nova (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422005000300009 |
Resumo: | Photodegradation of the PAHs anthracene, chrysene and benzo[k]fluoranthane on silica gel impregnated with TiO2 and over glass plates holding TiO2 was studied. Silica gel plates holding these substances were exposed to solar radiation, developed with hexane and photographed under ultra-violet light. The plates containing benzo[k]fluoranthene were also analysed by both diffuse reflectance and laser induced fluorescence. Diffuse reflectance spectra of the fluorescent spot from non irradiated plates showed small differences when compared with those obtained from irradiated plates. These spectral differences are compatible with formation of less conjugated compounds during irradiation. Fluorescence and time resolved fluorescence spectra observed after irradiation were identical to those obtained with benzo[k]fluoranthene in methanol. On plates holding silica, PAH degradation requires longer periods of solar irradiation when compared with those plates containing silica impregnated with TiO2. Glass plates impregnated with TiO2 also showed very rapid PAH degradation. |
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Fotodegradação de hidrocarbonetos policíclicos aromáticos em placas de sílica impregnadas com dióxido de titânioPAHphotodegradationthin layer chromatographyPhotodegradation of the PAHs anthracene, chrysene and benzo[k]fluoranthane on silica gel impregnated with TiO2 and over glass plates holding TiO2 was studied. Silica gel plates holding these substances were exposed to solar radiation, developed with hexane and photographed under ultra-violet light. The plates containing benzo[k]fluoranthene were also analysed by both diffuse reflectance and laser induced fluorescence. Diffuse reflectance spectra of the fluorescent spot from non irradiated plates showed small differences when compared with those obtained from irradiated plates. These spectral differences are compatible with formation of less conjugated compounds during irradiation. Fluorescence and time resolved fluorescence spectra observed after irradiation were identical to those obtained with benzo[k]fluoranthene in methanol. On plates holding silica, PAH degradation requires longer periods of solar irradiation when compared with those plates containing silica impregnated with TiO2. Glass plates impregnated with TiO2 also showed very rapid PAH degradation.Sociedade Brasileira de Química2005-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422005000300009Química Nova v.28 n.3 2005reponame:Química Nova (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0100-40422005000300009info:eu-repo/semantics/openAccessXavier,Laura Furquim WerneckMoreira,Isabel Maria N. S.Higarashi,Martha M.Moreira,Josino C.Ferreira,Luiz Filipe V.Oliveira,Anabela S.por2005-06-14T00:00:00Zoai:scielo:S0100-40422005000300009Revistahttps://www.scielo.br/j/qn/ONGhttps://old.scielo.br/oai/scielo-oai.phpquimicanova@sbq.org.br1678-70640100-4042opendoar:2005-06-14T00:00Química Nova (Online) - Sociedade Brasileira de Química (SBQ)false |
dc.title.none.fl_str_mv |
Fotodegradação de hidrocarbonetos policíclicos aromáticos em placas de sílica impregnadas com dióxido de titânio |
title |
Fotodegradação de hidrocarbonetos policíclicos aromáticos em placas de sílica impregnadas com dióxido de titânio |
spellingShingle |
Fotodegradação de hidrocarbonetos policíclicos aromáticos em placas de sílica impregnadas com dióxido de titânio Xavier,Laura Furquim Werneck PAH photodegradation thin layer chromatography |
title_short |
Fotodegradação de hidrocarbonetos policíclicos aromáticos em placas de sílica impregnadas com dióxido de titânio |
title_full |
Fotodegradação de hidrocarbonetos policíclicos aromáticos em placas de sílica impregnadas com dióxido de titânio |
title_fullStr |
Fotodegradação de hidrocarbonetos policíclicos aromáticos em placas de sílica impregnadas com dióxido de titânio |
title_full_unstemmed |
Fotodegradação de hidrocarbonetos policíclicos aromáticos em placas de sílica impregnadas com dióxido de titânio |
title_sort |
Fotodegradação de hidrocarbonetos policíclicos aromáticos em placas de sílica impregnadas com dióxido de titânio |
author |
Xavier,Laura Furquim Werneck |
author_facet |
Xavier,Laura Furquim Werneck Moreira,Isabel Maria N. S. Higarashi,Martha M. Moreira,Josino C. Ferreira,Luiz Filipe V. Oliveira,Anabela S. |
author_role |
author |
author2 |
Moreira,Isabel Maria N. S. Higarashi,Martha M. Moreira,Josino C. Ferreira,Luiz Filipe V. Oliveira,Anabela S. |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Xavier,Laura Furquim Werneck Moreira,Isabel Maria N. S. Higarashi,Martha M. Moreira,Josino C. Ferreira,Luiz Filipe V. Oliveira,Anabela S. |
dc.subject.por.fl_str_mv |
PAH photodegradation thin layer chromatography |
topic |
PAH photodegradation thin layer chromatography |
description |
Photodegradation of the PAHs anthracene, chrysene and benzo[k]fluoranthane on silica gel impregnated with TiO2 and over glass plates holding TiO2 was studied. Silica gel plates holding these substances were exposed to solar radiation, developed with hexane and photographed under ultra-violet light. The plates containing benzo[k]fluoranthene were also analysed by both diffuse reflectance and laser induced fluorescence. Diffuse reflectance spectra of the fluorescent spot from non irradiated plates showed small differences when compared with those obtained from irradiated plates. These spectral differences are compatible with formation of less conjugated compounds during irradiation. Fluorescence and time resolved fluorescence spectra observed after irradiation were identical to those obtained with benzo[k]fluoranthene in methanol. On plates holding silica, PAH degradation requires longer periods of solar irradiation when compared with those plates containing silica impregnated with TiO2. Glass plates impregnated with TiO2 also showed very rapid PAH degradation. |
publishDate |
2005 |
dc.date.none.fl_str_mv |
2005-06-01 |
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=S0100-40422005000300009 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422005000300009 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
10.1590/S0100-40422005000300009 |
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.28 n.3 2005 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_ |
1750318104549785600 |