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Campo DCValorIdioma
dc.creatorSilva, Ana Paula Valadares da-
dc.creatorSilva, Aline Oliveira-
dc.creatorLima, Francielle Roberta Dias de-
dc.creatorBenedet, Lucas-
dc.creatorFranco, Aline de Jesus-
dc.creatorSouza, Josimara Karina de-
dc.creatorRibeiro Júnior, Alexandre Carvalho-
dc.creatorBatista, Éder Rodrigues-
dc.creatorInda, Alberto Vasconcellos-
dc.creatorCuri, Nilton-
dc.creatorGuilherme, Luiz Roberto Guimarães-
dc.creatorCarneiro, Marco Aurélio Carbone-
dc.date.accessioned2023-02-17T21:32:07Z-
dc.date.available2023-02-17T21:32:07Z-
dc.date.issued2022-12-
dc.identifier.citationSILVA, A. P. V. da et al. Potentially toxic elements in iron mine tailings: Effects of reducing soil pH on available concentrations of toxic elements. Environmental Research, [S.I.], v. 215, 114321, Dec. 2022. DOI: https://doi.org/10.1016/j.envres.2022.114321.pt_BR
dc.identifier.urihttps://doi.org/10.1016/j.envres.2022.114321pt_BR
dc.identifier.urihttp://repositorio.ufla.br/jspui/handle/1/56038-
dc.description.abstractTailings from iron mining are characterized by high concentrations of iron and manganese oxides, as well as high pH values. With these characteristics, most of the potentially toxic elements (PTE) contained in the tailings are somewhat unavailable. The aim of the present study was to evaluate how a reduction in the pH of iron mine tailings may affect PTE availabilities. The tailings were collected on the banks of the Gualaxo do Norte River (Mariana, MG, Brazil), one of the main areas impacted by the rupture of the Fundão Dam (Barragem de Fundão). A completely randomized experimental design was used, including five pH values (6.4, 5.4, 4.3, 3.7, and 3.4) and five replications. The concentrations of the PTE (Ba, Cr, Cd, Co, Cu, Fe, Mn, Pb, Ni, and Zn) were determined after extraction following different methodologies: USEPA 3051A, DTPA, Mehlich-1, Mehlich-3, and distilled water. A comparison of the available concentrations of the elements in the tailings with those in a soil not impacted by tailings shows that Cr, Cd, Cu, Fe, Mn, Ni, Ba, and Co were higher in the soil impacted by the tailings. The different methods used for evaluating the availability of PTE in the tailings at various pH exhibited the following decreasing order in relation to the quantity extracted: Mehlich-3 > Mehlich-1 > DTPA > distilled water. However, regarding sensitivity to change in pH, the order was DTPA > water > Mehlich-1 > Mehlich-3. The increases in the concentrations of PTE due to the reduction in the pH of the tailings did not lead to concentrations that exceed the limits of Brazilian regulations. The DTPA extractant exhibited higher coefficients of correlation between the PTE concentrations and the pH of the tailings, proving to be suitable for use in areas affected by the deposition of iron mine tailings.pt_BR
dc.languageenpt_BR
dc.publisherElsevierpt_BR
dc.rightsrestrictAccesspt_BR
dc.sourceEnvironmental Researchpt_BR
dc.subjectFundão dampt_BR
dc.subjectSoil extractantspt_BR
dc.subjectEnvironmental degradationpt_BR
dc.subjectSoil contaminationpt_BR
dc.subjectSolos - Contaminaçãopt_BR
dc.subjectDegradação ambientalpt_BR
dc.subjectRejeitos de mineraçãopt_BR
dc.titlePotentially toxic elements in iron mine tailings: Effects of reducing soil pH on available concentrations of toxic elementspt_BR
dc.typeArtigopt_BR
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