Unsupervised pattern-recognition and radiological risk assessment applied to the evaluation of behavior of rare earth elements, Th, and U in monazite sand.

Autor: Wyatt NLP; Spectrometry Atomic Laboratory (LEA)/LabPetro, Department of Chemistry, Federal University of Espírito Santo, Vitória, ES, 29075-910, Brazil., Costa VC; Spectrometry Atomic Laboratory (LEA)/LabPetro, Department of Chemistry, Federal University of Espírito Santo, Vitória, ES, 29075-910, Brazil., de Souza JR; Spectrometry Atomic Laboratory (LEA)/LabPetro, Department of Chemistry, Federal University of Espírito Santo, Vitória, ES, 29075-910, Brazil., Ferde M; Spectrometry Atomic Laboratory (LEA)/LabPetro, Department of Chemistry, Federal University of Espírito Santo, Vitória, ES, 29075-910, Brazil., Costa FS; Department of Chemistry, Federal University of Paraná, Curitiba, PR, 81531-980, Brazil., Neris JB; Department of Chemistry, Universidade Federal Do São Carlos, São Carlos, SP, 13565-905, Brazil., Brandão GP; Spectrometry Atomic Laboratory (LEA)/LabPetro, Department of Chemistry, Federal University of Espírito Santo, Vitória, ES, 29075-910, Brazil., Guedes WN; Embrapa Instrumentation, São Carlos, SP, 13560-970, Brazil., Carneiro MTWD; Spectrometry Atomic Laboratory (LEA)/LabPetro, Department of Chemistry, Federal University of Espírito Santo, Vitória, ES, 29075-910, Brazil. mariacarneiro@hotmail.com.
Jazyk: angličtina
Zdroj: Environmental science and pollution research international [Environ Sci Pollut Res Int] 2022 Nov; Vol. 29 (55), pp. 83417-83425. Date of Electronic Publication: 2022 Jun 28.
DOI: 10.1007/s11356-022-21632-w
Abstrakt: The Brazilian coast is rich in monazite which is found in beach sand deposits. In this study, the composition of the monazite sands from beaches of State of Espírito Santo, Brazil, was investigated. The concentrations of rare earth elements (REEs), Th, and U were determined by inductively coupled plasma mass spectrometry (ICP-MS). In the studied region, the mean concentration of investigated elements increased in the following order: Tm < Yb < Ho < Lu < Eu < Er < Tb < Dy < U < Y < Th < Gd < Sm < Pr < Nd < La < Ce. The sampling sites were classified into three clusters and discriminated by the concentrations of REEs, Th, and U found. In general, the radiological risk indices were higher than the established limits, and the risk of developing cancer was estimated to be higher than the world average.
(© 2022. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)
Databáze: MEDLINE
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