Please use this identifier to cite or link to this item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/930545
Title: EPR and DRIFT spectroscopic characterization of humic fractions during composting of sawdust and paper mill sludge.
Authors: MAIA, C. M. B. de F.
FUKAMACHI, C. R. B.
PICCOLO, A.
MANGRICH, A. S.
Affiliation: CLAUDIA MARIA BRANCO DE F MAIA, CNPF; CRISTIANE REGINA BUDZIAK FUKAMACHI, UFPR; ALESSANDRO PICCOLO, Università di Napoli Federico II; ANTONIO SÁLVIO MANGRICH, UFPR.
Date Issued: 2012
Citation: Pesquisa Florestal Brasileira, Colombo, v. 32, n. 70, p.117-122, abr./jun. 2012.
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+.
Keywords: Substância húmica
Humificação
UV-vis
Language: en
Type of Material: Artigo de periódico
Access: openAccess
Appears in Collections:Artigo em periódico indexado (CNPF)

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