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Use este identificador para citar o ir al link de este elemento: http://hdl.handle.net/1843/54404
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Campo DCValorIdioma
dc.creatorDaniel Vieira de Sousapt_BR
dc.creatorLuciano Moura Guimarãespt_BR
dc.creatorJorlandio Francisco Félixpt_BR
dc.creatorJoão Carlos Kerpt_BR
dc.creatorCarlos Ernesto Gonçalves Reynaud Schaeferpt_BR
dc.creatorMaria Jacqueline Rodetpt_BR
dc.date.accessioned2023-06-02T20:08:16Z-
dc.date.available2023-06-02T20:08:16Z-
dc.date.issued2020-
dc.citation.volume15pt_BR
dc.citation.issue3pt_BR
dc.identifier.doihttps://doi.org/10.1371/journal.pone.0229447pt_BR
dc.identifier.issn1932-6203pt_BR
dc.identifier.urihttp://hdl.handle.net/1843/54404-
dc.description.resumoThe presence of biochar with high carbon accumulation capacity and nutrient adsorption is causally associated with archeological soils. Although this type of soil organic matter has been known for a long time, the knowledge of its structure and environmental behavior is still limited. This work used Raman spectroscopy to obtain structural information and identify alterations in biochar particles. To this end, we studied biochar particles found in an archaeological site with a temporal window lasting 12451 to 11080 yr cal BP. The molecular, structural and sp2/sp3 characteristics of the charcoal particles were determined at the time of burning and associated with the temperature, time and characteristics of the burnt material. We propose that the process of oxidation of the biochar occurs during the first 2000 years after its genesis. The oxidation process is a reflection of decreases in the number of defects related to sp2 bonds on amorphous carbons and increases in the number of defects associated with ionic impurities, which clearly indicate the interaction between biochar particles and the soil matrix. The data confirm the hypothesis that the persistence of biochar in the environment is due to its graphite structure and suggest that over a 12000 year timeframe, biochar particles undergo several changes that occur in the disordered phase and are rapidly oxidized.pt_BR
dc.description.sponsorshipOutra Agênciapt_BR
dc.format.mimetypepdfpt_BR
dc.languageengpt_BR
dc.publisherUniversidade Federal de Minas Geraispt_BR
dc.publisher.countryBrasilpt_BR
dc.publisher.departmentFAF - DEPARTAMENTO DE ANTROPOLOGIA E ARQUEOLOGIApt_BR
dc.publisher.initialsUFMGpt_BR
dc.relation.ispartofPlos onept_BR
dc.rightsAcesso Abertopt_BR
dc.subjectBiocharpt_BR
dc.subjectCarbon accumulationpt_BR
dc.subjectArchaeological sitept_BR
dc.subjectProcess of oxidationpt_BR
dc.subject.otherBiocharpt_BR
dc.subject.otherCarbonopt_BR
dc.subject.otherSítios arqueológicospt_BR
dc.subject.otherOxidaçãopt_BR
dc.titleDynamic of the structural alteration of biochar in ancient Anthrosol over a long timescale by Raman spectroscopypt_BR
dc.typeArtigo de Periódicopt_BR
dc.url.externahttps://journals.plos.org/plosone/article?id=10.1371/journal.pone.0229447pt_BR
dc.identifier.orcidhttp://orcid.org/0000-0002-3647-2945pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0003-0986-1854pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0001-7060-1598pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0001-5742-5999pt_BR
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