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Please use this identifier to cite or link to this item: http://acervodigital.unesp.br/handle/11449/10026
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dc.contributor.authorRosa, André Henrique-
dc.contributor.authorde Oliveira, L. C.-
dc.contributor.authorBellin, I. C.-
dc.contributor.authorRocha, Julio Cesar-
dc.contributor.authorRomao, LPC-
dc.contributor.authorDias, N. L.-
dc.date.accessioned2014-05-20T13:29:37Z-
dc.date.accessioned2016-10-25T16:48:56Z-
dc.date.available2014-05-20T13:29:37Z-
dc.date.available2016-10-25T16:48:56Z-
dc.date.issued2005-08-01-
dc.identifierhttp://dx.doi.org/10.1016/j.tca.2005.02.001-
dc.identifier.citationThermochimica Acta. Amsterdam: Elsevier B.V., v. 433, n. 1-2, p. 77-82, 2005.-
dc.identifier.issn0040-6031-
dc.identifier.urihttp://hdl.handle.net/11449/10026-
dc.identifier.urihttp://acervodigital.unesp.br/handle/11449/10026-
dc.description.abstractAn investigation was made of the influence of alkaline extraction on the characteristics of humic substances extracted from Brazilian soil samples. Humic substances (HS) from seven different soils samples collected in Brazil were extracted using the procedure recommended by the International Humic Substances Society (IHSS). Soils, HS and humins were characterized by thermogravimetry and differential thermal analysis. About 8 mg of each material (soil, HS and humin) were placed in a platinum crucible and heated continuously from 20 to 750 degrees C at a heating rate of 10 degrees C min(-1) in an atmosphere of synthetic air (100 ml min(-1)). A thermal analysis revealed a difference between the content and structural characteristics of organic matter present in HS and humin fractions in relation to their soils. The results indicated that alkaline extraction alters the characteristics of humic substances during the extraction process, underlining the importance of developing methodologies and analytical procedures that allow organic matter in soils to be studied without extracting it. (c) 2005 Elsevier B.V. All rights reserved.en
dc.format.extent77-82-
dc.language.isoeng-
dc.publisherElsevier B.V.-
dc.sourceWeb of Science-
dc.subjecthumic substancespt
dc.subjecthuminpt
dc.subjectBrazilian soilspt
dc.subjectextractionpt
dc.subjectthermogravimetry and differential thermal analysispt
dc.titleInfluence of alkaline extraction on the characteristics of humic substances in Brazilian soilsen
dc.typeoutro-
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
dc.contributor.institutionUniversidade Federal de Sergipe (UFS)-
dc.description.affiliationSão Paulo State Univ UNESP, Dept Environm Engn, BR-18087180 Sorocaba, SP, Brazil-
dc.description.affiliationUNESP, Inst Chem, Dept Analyt Chem, BR-14800900 Araraquara, SP, Brazil-
dc.description.affiliationFed Univ Sergipe UFS, Dept Chem, BR-49100000 Aracaju, SE, Brazil-
dc.description.affiliationUniv São Paulo State UNESP, Dept Phys & Chem, BR-15385000 Ilha Solteira, SP, Brazil-
dc.description.affiliationUnespSão Paulo State Univ UNESP, Dept Environm Engn, BR-18087180 Sorocaba, SP, Brazil-
dc.description.affiliationUnespUNESP, Inst Chem, Dept Analyt Chem, BR-14800900 Araraquara, SP, Brazil-
dc.description.affiliationUnespUniv São Paulo State UNESP, Dept Phys & Chem, BR-15385000 Ilha Solteira, SP, Brazil-
dc.identifier.doi10.1016/j.tca.2005.02.001-
dc.identifier.wosWOS:000230580600010-
dc.rights.accessRightsAcesso restrito-
dc.relation.ispartofThermochimica Acta-
dc.identifier.orcid0000-0002-2042-018Xpt
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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