Data/hora: 23/09/2024 19:48:21

Biblioteca(s): 	Embrapa Solos.	
Data corrente: 	11/02/2014	
Data da última atualização: 	04/02/2015	
Autoria: 	ALHO, C. F. B. V.; CROSS, A.; SOHI, S.; RODRIGUES, R. C.; NOVOTNY, E. H.; MAIA, C. M. B. de F.; LELIS, R. C. C.	
Afiliação: 	CARLOS FRANCISCO BRAZÃO VIEIRA ALHO, Wageningen University, Wageningen, the Netherlands; ANDREW CROOS, United Kingdom Biochar Re- search Centre, Edinburgh, United Kingdom; SARAN SOHI, United Kingdom Biochar Re- search Centre, Edinburgh, United Kingdom; RUBEN CASSEL RODRIGUES, CPACT; ETELVINO HENRIQUE NOVOTNY, CNPS; CLAUDIA MARIA BRANCO DE FREITAS MAIA, Embrapa Floresta; ROBERTO CARLOS COSTA LELIS, UFRRJ.	
Título: 	Biochar stable fraction quantification by thermochemical oxidation and assessement by 13C-NMR spectrocopy.	
Ano de publicação: 	2013	
Fonte/Imprenta: 	In: ENCONTRO BRASILEIRO DE SUBSTÂNCIAS HÚMICAS, 10., Santo Antônio de Goiás, GO, 2013. Anais... Porto Alegre: Grupo Brasileiro da Sociedade Internacional de substâncias húmicas, 2013.	
Páginas: 	4p.	
Idioma: 	Português	
Conteúdo: 	Although biochar is often regarded lized into carbon dioxide. However, it is unclear how much of this material is rapidly oxidized, that is, how much remain in the soil for NQPIGTRGTKQFU'&#401;QTVUJCXGDGGPWPFGTVCMGP to develop methodologies to quantify the stable fraction present in biochar, quickly, easily reproducible, and that somehow represents TGCN?GNFEQPFKVKQPU6JGTGHQTGVJGCKOQHVJKU UVWF[YCUVQGXCNWCVGVJGG&#401;GEVQHFK&#401;GTGPV R[TQN[UKU?PCNVGORGTCVWTGUQPVJGUVCDKNKV[QH biochar produced from Eucalyptus dunnii wood by analyzing biochar samples before and after a thermo-chemical oxidation using 13 C NMR spec- troscopy. Stable-C fraction increased as higher R[TQN[UKU?PCNVGORGTCVWTGYCU6JGTOQEJGOical oxidation was responsible for removing labile structures still present as well as aromatic structures less resistant to degradation. Thermo-chemical oxidation was also responsible for the functionalization of biochars, being this ef- HGEVOKNFGTCUJKIJGTR[TQN[UKU?PCNVGORGTCVWTG was. The balance between C storage (Stable-C HTCEVKQPCPFCITQPQOKEDGPG?VU HWPEVKQPCNK\Ction) of biochar should be carefully evaluated, as its characteristics can vary depending on the conditions by which it was produced.	
Palavras-Chave: 	Functionalizatio n; Sta- bility; Thermo-chemical oxidation.	
Thesaurus Nal: 	biochar; carbon sequestration.	
Categoria do assunto: 	P Recursos Naturais, Ciências Ambientais e da Terra	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/item/96985/1/2013ClaudiaMEBSHBiocharStable.pdf	
Registro original: 	Embrapa Solos (CNPS)	
Exemplares: 	CNPS - (17939-1) - UPC - RA - DD - 14.00063 -  - 14.00063 - DIS