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

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dc.contributorCLAUDIA MARIA BRANCO DE F MAIA, CNPF; CRISTIANE REGINA BUDZIAK FUKAMACHI, UFPR; ALESSANDRO PICCOLO, Università di Napoli Federico II; ANTONIO SÁLVIO MANGRICH, UFPR.
dc.creatorMAIA, C. M. B. de F.
dc.creatorFUKAMACHI, C. R. B.
dc.creatorPICCOLO, A.
dc.creatorMANGRICH, A. S.
dc.date2012-08-06T11:11:11Z
dc.date2012-08-06T11:11:11Z
dc.date2012-08-06
dc.date2012
dc.date2015-01-09T11:11:11Z
dc.date.accessioned2026-07-07T03:23:48Z
dc.descriptionThe 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+.
dc.identifierPesquisa Florestal Brasileira, Colombo, v. 32, n. 70, p.117-122, abr./jun. 2012.
dc.identifierhttp://www.alice.cnptia.embrapa.br/alice/handle/doc/930545
dc.identifier.urihttp://hdl.handle.net/123456789/432663
dc.languageeng
dc.rightsopenAccess
dc.subjectSubstância húmica
dc.subjectHumificação
dc.subjectUV-vis
dc.titleEPR and DRIFT spectroscopic characterization of humic fractions during composting of sawdust and paper mill sludge.
dc.typeArtigo de periódico

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