Use este identificador para citar ou linkar para este item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1001607
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dc.contributor.authorRODRIGUES, A. F.pt_BR
dc.contributor.authorNOVOTNY, E. H.pt_BR
dc.contributor.authorOLIVEIRA, R. R.pt_BR
dc.date.accessioned2014-12-04T11:11:11Zpt_BR
dc.date.available2014-12-04T11:11:11Zpt_BR
dc.date.created2014-12-04pt_BR
dc.date.issued2014pt_BR
dc.identifier.citationIn: MEETING OF THE INTERNATIONAL HUMIC SUBSTANCES SOCIETY, 17., 2014, Ioannina. Natural organic matter: structure-dynamics innovative applications: book of abstracts. Ioannina: University of Ioannina, 2014. p. 277-278.pt_BR
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1001607pt_BR
dc.descriptionDuring the late nineteenth century, some areas in Rio de Janeiro - Brazil - has undergone remarkable transformation of the forest arising from ancient charcoal activity carried out by ex-slaves. Nowadays, in the area of abandoned ancient kilns, it is possible identify charcoal in the soil. The charcoal weathering, in another anthropic soil, the Terra Preta de Índios (TPI), generated a peculiar soil organic matter, i.e very recalcitrant and with high cation exchange capacity (CEC), resulting in a resilient soil against degradation by intensive use. Thus, the structural comparison, by 13C Nuclear Magnetic Resonance, of the humic acids (HA) from paleo-charcoal kiln and from TPI facilitate to confirm the hypothesis that the natural weathering of charcoal in the soil generate this peculiar organic matter. The result showed that the HA from paleo-charcoal kiln in Rio de Janeiro show similar features from TPI, i.e: policondensed aromatic rings heavily functionalised with carboxylic groups.pt_BR
dc.language.isoengeng
dc.rightsopenAccesseng
dc.subjectCarvoariapt_BR
dc.subjectTerra Preta de Índiospt_BR
dc.subjectCarbono pirogênicopt_BR
dc.subjectRessonância magnética nuclear do carbono-13pt_BR
dc.titleChemical composition of humic acids extracted from soils influenced by ancient charcoal production in Rio de Janeiro - Brazil.pt_BR
dc.typeArtigo em anais e proceedingspt_BR
dc.date.updated2014-12-04T11:11:11Zpt_BR
dc.subject.thesagroCarvão vegetalpt_BR
dc.subject.thesagroCarbonopt_BR
dc.subject.nalthesaurusCharcoalpt_BR
dc.subject.nalthesaurusCarbonpt_BR
riaa.ainfo.id1001607pt_BR
riaa.ainfo.lastupdate2014-12-04pt_BR
dc.contributor.institutionA. F. RODRIGUES, PUC-RJ; ETELVINO HENRIQUE NOVOTNY, CNPS; R. R. OLIVEIRA, PUC-RJ.pt_BR
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