Materiais à base de óxido de ferro para oxidação de compostos presentes no efluente da despolpa do café

Detalhes bibliográficos
Autor(a) principal: Gonçalves,Maraísa
Data de Publicação: 2008
Outros Autores: Guerreiro,Mário César, Oliveira,Luiz Carlos Alves, Rocha,Cristian Luciana da
Tipo de documento: Artigo
Idioma: por
Título da fonte: Química Nova (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422008000700007
Resumo: Materials based on pure iron oxide and impregnated with niobia (Nb2O5) were prepared. Their catalytic activities were tested on the oxidation of compounds present in the wastewater from the processing of coffee berries. Particularly caffeine and catechol were tested. The oxidation reactions were carried out with the following systems (i) UV/H2O2, (ii) photo-Fenton and (iii) heterogeneous Fenton. All materials were characterized with X-ray diffraction, Mössbauer and infrared spectroscopy. Iron was mainly in the forms of goethite and maghemite. The oxidation kinetics were monitored by UV-vis and the oxidation products were monitored by mass spectrometry. The photo-Fenton reaction presented highest oxidation efficiency, removing 98% of all caffeine and catechol contents.
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spelling Materiais à base de óxido de ferro para oxidação de compostos presentes no efluente da despolpa do caféoxidationniobiairon oxideMaterials based on pure iron oxide and impregnated with niobia (Nb2O5) were prepared. Their catalytic activities were tested on the oxidation of compounds present in the wastewater from the processing of coffee berries. Particularly caffeine and catechol were tested. The oxidation reactions were carried out with the following systems (i) UV/H2O2, (ii) photo-Fenton and (iii) heterogeneous Fenton. All materials were characterized with X-ray diffraction, Mössbauer and infrared spectroscopy. Iron was mainly in the forms of goethite and maghemite. The oxidation kinetics were monitored by UV-vis and the oxidation products were monitored by mass spectrometry. The photo-Fenton reaction presented highest oxidation efficiency, removing 98% of all caffeine and catechol contents.Sociedade Brasileira de Química2008-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422008000700007Química Nova v.31 n.7 2008reponame:Química Nova (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0100-40422008000700007info:eu-repo/semantics/openAccessGonçalves,MaraísaGuerreiro,Mário CésarOliveira,Luiz Carlos AlvesRocha,Cristian Luciana dapor2008-12-09T00:00:00Zoai:scielo:S0100-40422008000700007Revistahttps://www.scielo.br/j/qn/ONGhttps://old.scielo.br/oai/scielo-oai.phpquimicanova@sbq.org.br1678-70640100-4042opendoar:2008-12-09T00:00Química Nova (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv Materiais à base de óxido de ferro para oxidação de compostos presentes no efluente da despolpa do café
title Materiais à base de óxido de ferro para oxidação de compostos presentes no efluente da despolpa do café
spellingShingle Materiais à base de óxido de ferro para oxidação de compostos presentes no efluente da despolpa do café
Gonçalves,Maraísa
oxidation
niobia
iron oxide
title_short Materiais à base de óxido de ferro para oxidação de compostos presentes no efluente da despolpa do café
title_full Materiais à base de óxido de ferro para oxidação de compostos presentes no efluente da despolpa do café
title_fullStr Materiais à base de óxido de ferro para oxidação de compostos presentes no efluente da despolpa do café
title_full_unstemmed Materiais à base de óxido de ferro para oxidação de compostos presentes no efluente da despolpa do café
title_sort Materiais à base de óxido de ferro para oxidação de compostos presentes no efluente da despolpa do café
author Gonçalves,Maraísa
author_facet Gonçalves,Maraísa
Guerreiro,Mário César
Oliveira,Luiz Carlos Alves
Rocha,Cristian Luciana da
author_role author
author2 Guerreiro,Mário César
Oliveira,Luiz Carlos Alves
Rocha,Cristian Luciana da
author2_role author
author
author
dc.contributor.author.fl_str_mv Gonçalves,Maraísa
Guerreiro,Mário César
Oliveira,Luiz Carlos Alves
Rocha,Cristian Luciana da
dc.subject.por.fl_str_mv oxidation
niobia
iron oxide
topic oxidation
niobia
iron oxide
description Materials based on pure iron oxide and impregnated with niobia (Nb2O5) were prepared. Their catalytic activities were tested on the oxidation of compounds present in the wastewater from the processing of coffee berries. Particularly caffeine and catechol were tested. The oxidation reactions were carried out with the following systems (i) UV/H2O2, (ii) photo-Fenton and (iii) heterogeneous Fenton. All materials were characterized with X-ray diffraction, Mössbauer and infrared spectroscopy. Iron was mainly in the forms of goethite and maghemite. The oxidation kinetics were monitored by UV-vis and the oxidation products were monitored by mass spectrometry. The photo-Fenton reaction presented highest oxidation efficiency, removing 98% of all caffeine and catechol contents.
publishDate 2008
dc.date.none.fl_str_mv 2008-01-01
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=S0100-40422008000700007
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422008000700007
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv 10.1590/S0100-40422008000700007
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.31 n.7 2008
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
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