Influence of soil conditions on the distribution coefficients of 226 Ra in natural soils

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dc.creatorP. Blanco Rodríguez
dc.creatorJ.C. Lozano
dc.creatorF. Vera Tomé
dc.creatorCristina Prieto
dc.creatorAdriana de Souza Medeiros Batista
dc.date.accessioned2023-08-17T20:55:38Z
dc.date.accessioned2025-09-09T01:25:49Z
dc.date.available2023-08-17T20:55:38Z
dc.date.issued2018-04-17
dc.format.mimetypepdf
dc.identifier.issn0045-6535
dc.identifier.urihttps://hdl.handle.net/1843/57912
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofChemosphere
dc.rightsAcesso Restrito
dc.subjectCentrifugação
dc.subjectRádio (Elemento)
dc.subject.otherCentrifugation
dc.subject.otherDistribution coefficient
dc.subject.otherRadium
dc.subject.otherSoil solution
dc.titleInfluence of soil conditions on the distribution coefficients of 226 Ra in natural soils
dc.typeArtigo de periódico
local.citation.epage193
local.citation.issue2018
local.citation.spage188
local.citation.volume205
local.description.resumoIn order to clarify some of the assumptions and approximations about the use of the distribution co efficient Kd for 226Ra in soils, a systematic study has been performed using centrifugation to extract the soil solution. The separated fractions of the soil solution have different kinetics with respect to the sorption process in the soil, which may in turn condition the final chemical composition and even the speciation of the radionuclides in solution. In the experimental design of this study three factors were considered: the moisture level in the incubation process, incubation time and the speed of centrifugation. Also, three levels were chosen for each factor. In order to analyze the influence of the structural characteristics of the soil, this study was performed with three textural fractions: coarse sand, fine sand, and silt and clay, obtained from an only soil. Also, the soil was naturally enriched with radionuclides ofthe 238U series. An analysis of variance (ANOVA) was performed in order to assess the influence of the factors studied on the distribution coefficient of 226Ra. The results indicate that different behaviors can be observed depending on the structural characteristic of the soil. In the case of particle size, the soil with the largest grain size showed that the incubation process parameters influence the equilibrium level achieved, while in the case of the smallest edaphic particles, radium is not homogeneously distributed in the soil solution and the Kd value is dependent on the speed of centrifugation.
local.identifier.orcidhttps://orcid.org/0000-0001-6834-7551
local.publisher.countryBrasil
local.publisher.departmentMED - DEPARTAMENTO DE ANATOMIA E IMAGEM
local.publisher.initialsUFMG
local.url.externahttps://www.sciencedirect.com/science/article/abs/pii/S0045653518307422?via%3Dihub

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