Unsupervised pattern-recognition and radiological risk assessment applied to the evaluation of behavior of rare earth elements, Th, and U in monazite sand.
Environ Sci Pollut Res Int
; 29(55): 83417-83425, 2022 Nov.
Article
in En
| MEDLINE
| ID: mdl-35763145
ABSTRACT
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.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Sand
/
Metals, Rare Earth
Type of study:
Etiology_studies
/
Risk_factors_studies
Country/Region as subject:
America do sul
/
Brasil
Language:
En
Journal:
Environ Sci Pollut Res Int
Journal subject:
SAUDE AMBIENTAL
/
TOXICOLOGIA
Year:
2022
Document type:
Article
Affiliation country:
Brazil