Organo-mineral associations in a Spodosol from northern Brazil

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dc.contributor.authorClabel, J. L.
dc.contributor.authorNicolodelli, G.
dc.contributor.authorSenesi, G. S.
dc.contributor.authorMontes, C. R.
dc.contributor.authorPerruci, N. A. Felicio [UNESP]
dc.contributor.authorBezzon, V. D. N. [UNESP]
dc.contributor.authorBalogh, D. T.
dc.contributor.authorMilori, D. M. B. P.
dc.contributor.institutionEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Federal de Santa Catarina (UFSC)
dc.contributor.institutionCNR
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2021-06-25T11:20:59Z
dc.date.available2021-06-25T11:20:59Z
dc.date.issued2020-09-01
dc.description.abstractThe associations between organic and mineral matter in the horizons of an Amazonian humiluvic Spodosol profile were studied by investigating the composition of the constituent organic compounds, the surface wettability and the relationships among the chemical, structural, and microstructural properties using Fourier Transform Infrared (FTIR) spectroscopy and contact angle (CA) analysis. With increasing the profile depth, the C-H FTIR absorption decreased accompanied by a relative increase in C = O FTIR absorption. A number of significant correlations were found between the experimental variables measured. In particular, the positive correlation between soil organic carbon (SOC) (1.43 to 31.13 g kg(-1)) and intensity of aromatic structural C = C peak at 1620 cm(-1) downward the soil profile suggested the existence of higher amounts of more stable organic compounds with depth. The negative correlation between the intensity of aliphatic structures peaks from 3000 to 2800 cm(-1) and the clay minerals content indicated an increasing soil wettability with depth. The relative affinity of organic matter to mineral surfaces changed as a function of the mineral type distribution along the soil profile. As well, the chemical composition of organic matter and the type of phase fractions influenced whole soil wettability based on the SOC/clay relation to CA. (C) 2020 Elsevier B.V. All rights reserved.en
dc.description.affiliationEmbrapa Instrumentat, POB 741, BR-13560970 Sao Carlos, SP, Brazil
dc.description.affiliationUniv Sao Paulo, Sao Carlos Inst Phys, POB 369, BR-13560970 Sao Carlos, SP, Brazil
dc.description.affiliationUniv Fed Santa Catarina, Dept Phys, POB 476, BR-88040900 Florianopolis, SC, Brazil
dc.description.affiliationCNR, Ist Sci & Tecnol Plasmi ISTP, Sede Bari, Via Amendola 122-D, I-70126 Bari, Italy
dc.description.affiliationUniv Sao Paulo, Ctr Nucl Energy Agr, POB 09, BR-13418900 Piracicaba, SP, Brazil
dc.description.affiliationSao Paulo State Univ, Inst Chem, POB 09, BR-14800900 Araraquara, SP, Brazil
dc.description.affiliationUnespSao Paulo State Univ, Inst Chem, POB 09, BR-14800900 Araraquara, SP, Brazil
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipIdCNPq: 402624/2015-7
dc.format.extent10
dc.identifierhttp://dx.doi.org/10.1016/j.geodrs.2020.e00303
dc.identifier.citationGeoderma Regional. Amsterdam: Elsevier, v. 22, 10 p., 2020.
dc.identifier.doi10.1016/j.geodrs.2020.e00303
dc.identifier.issn2352-0094
dc.identifier.urihttp://hdl.handle.net/11449/208802
dc.identifier.wosWOS:000568759600006
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofGeoderma Regional
dc.sourceWeb of Science
dc.subjectAmazon humiluvic Spodosol
dc.subjectOrganic matter
dc.subjectMinerals
dc.subjectContact angle
dc.titleOrgano-mineral associations in a Spodosol from northern Brazilen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.

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