Identification and quantification of iron oxides by diffuse reflectance spectroscopy with Praying Mantis accessory and integration sphere

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual de Maringá (UEM)-
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.creatorCanton, Leila Cristina-
Autor(es): dc.creatorSouza Júnior, Ivan Granemann de-
Autor(es): dc.creatorSilva, Laércio Santos [UNESP]-
Autor(es): dc.creatorMarques Júnior, José [UNESP]-
Autor(es): dc.creatorCosta, Antonio Carlos Saraiva da-
Data de aceite: dc.date.accessioned2022-02-22T00:47:24Z-
Data de disponibilização: dc.date.available2022-02-22T00:47:24Z-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2020-12-31-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.catena.2020.104899-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/206536-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/206536-
Descrição: dc.descriptionSoil color is one of the main attributes used in the Brazilian System of Soil Classification and is related to the presence and concentration of iron oxides. This work aimed to identify and quantify the iron oxides (hematite, goethite and maghemite) present in soils and synthetic minerals and compare the diffuse reflectance spectroscopy (DRS) data equipped with the Integration Sphere (DRS-IS) or the Praying Mantis (DRS-PM) accessories with reference values obtained by XRD. Four samples of synthetic iron oxides (hematite, goethite, maghemite, magnetite) and two samples of aluminosilicates (kaolinite and smectite) were selected along with the A and Bw Horizons from 6 Oxisols of the State of Paraná-Brazil. The soils were characterized on their physical and mineralogical attributes and organic carbon content. All minerals, soil samples, soils clay fractions treated and not treated with the boiling 5 M NaOH procedure and with 1.8 M H2SO4 were analyzed using the integration sphere, the Praying Mantis accessory and color determined in the Munsell scale using a Minolta CR 400 spectroradiometer. The DRS-PM, by means of the second derivative of Kubelka-Munk function was very promising for identification and quantification of hematite for presenting results close to those obtained by XRD. Otherwise, the quantification of goethite was overestimated in both DRS's measurements due to the presence of organic matter. It was not possible to identify and quantify the presence of maghemite in soils and mixture minerals samples using both DRSs accessories due to the superposition of secondary bands of goethite, hematite, and the magnetite on the maghemite spectrum. The presence of maghemite in the soil material induces an overestimation of hematite content by DRS. The estimation of the Hm/(Hm + Gt) and Gt/(Gt + Hm) ratios by both accessories presented good correlation with data obtained by XRD.-
Descrição: dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionFundação Araucária-
Descrição: dc.descriptionDepartment of Agronomy State University of Maringá (UEM) Department of Agronomy, Avenida Colombo 5790, Maringá-
Descrição: dc.descriptionDepartment of Soils and Fertilizers Faculty of Agrarian and Veterinary Sciences São Paulo State University (FCAV/UNESP), Jaboticabal-
Descrição: dc.descriptionDepartment of Soils and Fertilizers Faculty of Agrarian and Veterinary Sciences São Paulo State University (FCAV/UNESP), Jaboticabal-
Idioma: dc.languageen-
Relação: dc.relationCatena-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectGoethite-
Palavras-chave: dc.subjectHematite-
Palavras-chave: dc.subjectMaghemite-
Palavras-chave: dc.subjectSoil color-
Palavras-chave: dc.subjectSoil mineralogy-
Palavras-chave: dc.subjectX-rays diffraction-
Título: dc.titleIdentification and quantification of iron oxides by diffuse reflectance spectroscopy with Praying Mantis accessory and integration sphere-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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