Dynamic of the structural alteration of biochar in ancient Anthrosol over a long timescale by Raman spectroscopy

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dc.creatorDaniel Vieira de Sousa
dc.creatorLuciano Moura Guimarães
dc.creatorJorlandio Francisco Félix
dc.creatorJoão Carlos Ker
dc.creatorCarlos Ernesto Gonçalves Reynaud Schaefer
dc.creatorMaria Jacqueline Rodet
dc.date.accessioned2023-06-02T20:08:16Z
dc.date.accessioned2025-09-08T23:12:28Z
dc.date.available2023-06-02T20:08:16Z
dc.date.issued2020
dc.description.sponsorshipOutra Agência
dc.format.mimetypepdf
dc.identifier.doihttps://doi.org/10.1371/journal.pone.0229447
dc.identifier.issn1932-6203
dc.identifier.urihttps://hdl.handle.net/1843/54404
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofPlos one
dc.rightsAcesso Aberto
dc.subjectBiochar
dc.subjectCarbono
dc.subjectSítios arqueológicos
dc.subjectOxidação
dc.subject.otherBiochar
dc.subject.otherCarbon accumulation
dc.subject.otherArchaeological site
dc.subject.otherProcess of oxidation
dc.titleDynamic of the structural alteration of biochar in ancient Anthrosol over a long timescale by Raman spectroscopy
dc.typeArtigo de periódico
local.citation.issue3
local.citation.volume15
local.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.
local.identifier.orcidhttp://orcid.org/0000-0002-3647-2945
local.identifier.orcidhttps://orcid.org/0000-0003-0986-1854
local.identifier.orcidhttps://orcid.org/0000-0001-7060-1598
local.identifier.orcidhttps://orcid.org/0000-0001-5742-5999
local.publisher.countryBrasil
local.publisher.departmentFAF - DEPARTAMENTO DE ANTROPOLOGIA E ARQUEOLOGIA
local.publisher.initialsUFMG
local.url.externahttps://journals.plos.org/plosone/article?id=10.1371/journal.pone.0229447

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