Mercury fractionation in tropical soils: A critical point of view

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.creatorVasques, Isabela Cristina Filardi-
Autor(es): dc.creatorEgreja Filho, Fernando Barboza-
Autor(es): dc.creatorMorais, Everton G.-
Autor(es): dc.creatorLima, Francielle R. D.-
Autor(es): dc.creatorOliveira, Jakeline R.-
Autor(es): dc.creatorPereira, Polyana-
Autor(es): dc.creatorGuilherme, Luiz Roberto Guimarães-
Autor(es): dc.creatorMarques, João José-
Data de aceite: dc.date.accessioned2026-02-09T11:46:02Z-
Data de disponibilização: dc.date.available2026-02-09T11:46:02Z-
Data de envio: dc.date.issued2020-08-31-
Data de envio: dc.date.issued2020-08-31-
Data de envio: dc.date.issued2020-10-
Fonte completa do material: dc.identifierhttps://repositorio.ufla.br/handle/1/42727-
Fonte completa do material: dc.identifierhttps://doi.org/10.1016/j.chemosphere.2020.127114-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1147005-
Descrição: dc.descriptionProblems related to specificity and re-precipitation of metals in sequential chemical extractions can impair their routine use. In order to test the efficiency of a sequential chemical procedure, model compounds composed by soil components commonly found in tropical soils such as goethite, Al-goethite, ferrihydrite, hematite, bauxite, and humic acid were incubated with either Hg(NO3)2 or HgSO4 and submitted to chemical extraction. The procedure aims to assess: (i) water soluble Hg; (ii) bioaccessible Hg at pH near human stomach; (iii) Hg associated with organic matter; (iv) reduced Hg; (v) Hg associated with Fe, Al, and Mn oxides; and, (vi) residual Hg. This procedure was also tested via single and sequential extractions using the surface and subsurface samples of two tropical soils, i.e., a Rhodic Acrudox and a Typic Hapludox, with and without lime application. Soil samples were submitted to an adsorption experiment with HgCl2 and a high adsorption percentage was observed. The majority of Hg at both single and sequential procedure was extracted by an acetic acid solution (pH = 2). Liming, soil depth, and soil type were not determinative on Hg extractability. The sequential extraction applied showed a lack specificity of Hg fractions, confirmed by the model components.-
Idioma: dc.languageen-
Publicador: dc.publisherElsevier-
Direitos: dc.rightsrestrictAccess-
???dc.source???: dc.sourceChemosphere-
Palavras-chave: dc.subjectModel compounds-
Palavras-chave: dc.subjectSequential chemical extraction-
Palavras-chave: dc.subjectSingle chemical extraction-
Palavras-chave: dc.subjectMercúrio - Fracionamento-
Palavras-chave: dc.subjectCompostos-modelo-
Palavras-chave: dc.subjectExtração química-
Título: dc.titleMercury fractionation in tropical soils: A critical point of view-
Tipo de arquivo: dc.typeArtigo-
Aparece nas coleções:Repositório Institucional da Universidade Federal de Lavras (RIUFLA)

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