Data/hora: 23/06/2024 10:24:37

Biblioteca(s): | Embrapa Florestas.
Data corrente: | 06/08/2012
Data da última atualização: | 09/01/2015
Autoria: | MAIA, C. M. B. de F.; FUKAMACHI, C. R. B.; PICCOLO, A.; MANGRICH, A. S.
Afiliação: | CLAUDIA MARIA BRANCO DE F MAIA, CNPF; CRISTIANE REGINA BUDZIAK FUKAMACHI, UFPR; ALESSANDRO PICCOLO, Università di Napoli Federico II; ANTONIO SÁLVIO MANGRICH, UFPR.
Título: | EPR and DRIFT spectroscopic characterization of humic fractions during composting of sawdust and paper mill sludge.
Ano de publicação: | 2012
Fonte/Imprenta: | Pesquisa Florestal Brasileira, Colombo, v. 32, n. 70, p.117-122, abr./jun. 2012.
Idioma: | Inglês
Conteúdo: | 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+.
Palavras-Chave: | Humificação; Substância húmica; UV-vis.
Categoria do assunto: | --
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/102705/1/2012-API-Maia-EPRandDRIFT.pdf
Registro original: | Embrapa Florestas (CNPF)
Exemplares: | CNPF - (50125-1) - UMT - AP - DD -  -  -  - DIS