EPR and DRIFT spectroscopic characterization of humic fractions during composting of sawdust and paper mill sludge

Detalhes bibliográficos
Autor(a) principal: Maia, Claudia Maria Branco de Freitas
Data de Publicação: 2012
Outros Autores: Fukamachi, Cristiane Regina Budziak, Piccolo, Alessandro, Mangrich, Antonio Sálvio
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Pesquisa Florestal Brasileira (Online)
Texto Completo: https://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/303
Resumo: The spectroscopic characteristics (DRIFT, UV-visible and EPR) of humic fractions were studied during composting of sawdust and paper mill sludge. Infrared spectroscopy reveals a compost rich in hydroxyl and alkyl groups and carboxylates and carbohydrates. The alkyl fraction is abundant in the humic acids and humin. The decreasing of the E4/E6 ratio during composting indicates an enhancement of the organic chains number, with conjugated double bonds. This decreasing would correspond to a reduction of the lignin content and/or formation of porphyrins. The EPR shows that humin presents the highest concentration of free radical and the lowest intensities of the Fe3+.
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spelling EPR and DRIFT spectroscopic characterization of humic fractions during composting of sawdust and paper mill sludgeCaracterização espectroscópica (RPE e DRIFT) das frações húmicas durante a compostagem de lodo de fábrica de papel e serragemHumic substancesUV-VisHumificationSubstâncias húmicasUV-visHumificaçãoThe spectroscopic characteristics (DRIFT, UV-visible and EPR) of humic fractions were studied during composting of sawdust and paper mill sludge. Infrared spectroscopy reveals a compost rich in hydroxyl and alkyl groups and carboxylates and carbohydrates. The alkyl fraction is abundant in the humic acids and humin. The decreasing of the E4/E6 ratio during composting indicates an enhancement of the organic chains number, with conjugated double bonds. This decreasing would correspond to a reduction of the lignin content and/or formation of porphyrins. The EPR shows that humin presents the highest concentration of free radical and the lowest intensities of the Fe3+.The spectroscopic characteristics (DRIFT, UV-visible and EPR) of As características espectroscópicas (DRIFT, UV-visível e RPE) das frações húmicas foram estudadas durante a compostagem de serragem e lodo de fábrica de papel. A espectroscopia de infravermelho (DRIFT) revelou um composto rico em hidroxilas, carboxilatos, alquilas e carboidratos. A fração alifática está concentrada nos ácidos húmicos e na humina. A diminuição da razão E4/E6 durante a compostagem indica um aumento de cadeias orgânicas com ligações duplas conjugadas. Esta redução corresponderia a uma diminuição do teor de lignina e/ou a formação de porfirinas. O RPE mostrou que a humina apresenta a concentração mais alta de radicais livres e a menor concentração de Fe3+ livre.Embrapa Florestas2012-06-13info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/30310.4336/2012.pfb.32.70.01Pesquisa Florestal Brasileira; v. 32 n. 70 (2012): abr./jun.; 117Pesquisa Florestal Brasileira; Vol. 32 No. 70 (2012): abr./jun.; 1171983-26051809-3647reponame:Pesquisa Florestal Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAenghttps://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/303/260Copyright (c) 2012 Claudia Maria Branco de Freitas Maia, Cristiane Regina Budziak Fukamachi, Alessandro Piccolo, Antonio Sálvio Mangrichhttps://creativecommons.org/licenses/by-nc-nd/4.0info:eu-repo/semantics/openAccessMaia, Claudia Maria Branco de FreitasFukamachi, Cristiane Regina BudziakPiccolo, AlessandroMangrich, Antonio Sálvio2017-04-28T12:56:44Zoai:pfb.cnpf.embrapa.br/pfb:article/303Revistahttps://pfb.cnpf.embrapa.br/pfb/index.php/pfb/PUBhttps://pfb.cnpf.embrapa.br/pfb/index.php/pfb/oaipfb@embrapa.br || revista.pfb@gmail.com || patricia.mattos@embrapa.br1983-26051809-3647opendoar:2017-04-28T12:56:44Pesquisa Florestal Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv EPR and DRIFT spectroscopic characterization of humic fractions during composting of sawdust and paper mill sludge
Caracterização espectroscópica (RPE e DRIFT) das frações húmicas durante a compostagem de lodo de fábrica de papel e serragem
title EPR and DRIFT spectroscopic characterization of humic fractions during composting of sawdust and paper mill sludge
spellingShingle EPR and DRIFT spectroscopic characterization of humic fractions during composting of sawdust and paper mill sludge
Maia, Claudia Maria Branco de Freitas
Humic substances
UV-Vis
Humification
Substâncias húmicas
UV-vis
Humificação
title_short EPR and DRIFT spectroscopic characterization of humic fractions during composting of sawdust and paper mill sludge
title_full EPR and DRIFT spectroscopic characterization of humic fractions during composting of sawdust and paper mill sludge
title_fullStr EPR and DRIFT spectroscopic characterization of humic fractions during composting of sawdust and paper mill sludge
title_full_unstemmed EPR and DRIFT spectroscopic characterization of humic fractions during composting of sawdust and paper mill sludge
title_sort EPR and DRIFT spectroscopic characterization of humic fractions during composting of sawdust and paper mill sludge
author Maia, Claudia Maria Branco de Freitas
author_facet Maia, Claudia Maria Branco de Freitas
Fukamachi, Cristiane Regina Budziak
Piccolo, Alessandro
Mangrich, Antonio Sálvio
author_role author
author2 Fukamachi, Cristiane Regina Budziak
Piccolo, Alessandro
Mangrich, Antonio Sálvio
author2_role author
author
author
dc.contributor.author.fl_str_mv Maia, Claudia Maria Branco de Freitas
Fukamachi, Cristiane Regina Budziak
Piccolo, Alessandro
Mangrich, Antonio Sálvio
dc.subject.por.fl_str_mv Humic substances
UV-Vis
Humification
Substâncias húmicas
UV-vis
Humificação
topic Humic substances
UV-Vis
Humification
Substâncias húmicas
UV-vis
Humificação
description The spectroscopic characteristics (DRIFT, UV-visible and EPR) of humic fractions were studied during composting of sawdust and paper mill sludge. Infrared spectroscopy reveals a compost rich in hydroxyl and alkyl groups and carboxylates and carbohydrates. The alkyl fraction is abundant in the humic acids and humin. The decreasing of the E4/E6 ratio during composting indicates an enhancement of the organic chains number, with conjugated double bonds. This decreasing would correspond to a reduction of the lignin content and/or formation of porphyrins. The EPR shows that humin presents the highest concentration of free radical and the lowest intensities of the Fe3+.
publishDate 2012
dc.date.none.fl_str_mv 2012-06-13
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/303
10.4336/2012.pfb.32.70.01
url https://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/303
identifier_str_mv 10.4336/2012.pfb.32.70.01
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv https://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/303/260
dc.rights.driver.fl_str_mv https://creativecommons.org/licenses/by-nc-nd/4.0
info:eu-repo/semantics/openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/4.0
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Embrapa Florestas
publisher.none.fl_str_mv Embrapa Florestas
dc.source.none.fl_str_mv Pesquisa Florestal Brasileira; v. 32 n. 70 (2012): abr./jun.; 117
Pesquisa Florestal Brasileira; Vol. 32 No. 70 (2012): abr./jun.; 117
1983-2605
1809-3647
reponame:Pesquisa Florestal Brasileira (Online)
instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron:EMBRAPA
instname_str Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron_str EMBRAPA
institution EMBRAPA
reponame_str Pesquisa Florestal Brasileira (Online)
collection Pesquisa Florestal Brasileira (Online)
repository.name.fl_str_mv Pesquisa Florestal Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
repository.mail.fl_str_mv pfb@embrapa.br || revista.pfb@gmail.com || patricia.mattos@embrapa.br
_version_ 1783370933471281152

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