SHORT COMMUNICATION
First Report of Rare Earth Elements
and Other Chemical Elements in Sediments
of Rivers throughout Chile
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1
Department of Animal Science, Facultad de Ciencias Veterinarias, Universidad de Concepción,
Av. Vicente Méndez 595, Chillán, Chile
2
Departamento de Suelos y Recursos Naturales, Facultad de Agronomía, Universidad de Concepción,
Casilla 537, Chillán, Chile
3
Ecology & Biodiversity Department & Sustainability Research Centre, Facultad de Ciencias de la Vida,
Universidad Andrés Bello, Santiago, Chile
4
Comisión Chilena de Energía Nuclear, Nueva Bilbao 12501, Las Condes, Santiago, Chile
5
Laboratory of Aquatic Environmental Research, Centro de Estudios Avanzados - HUB Ambiental UPLA,
Universidad de Playa Ancha, Valparaíso, Chile
6
Millennium Nucleus INVASAL
7
Cape Horn International Center (CHIC)
Submission date: 2022-01-29
Final revision date: 2022-03-02
Acceptance date: 2022-03-30
Online publication date: 2022-06-20
Publication date: 2022-09-01
Corresponding author
Winfred Espejo
Department of Soils and Natural Resources, Facultad de Agronomía, Universidad de Concepción, Casilla 537, Chillán, Chile, 407003, Chillán, Chile
Pol. J. Environ. Stud. 2022;31(5):4061-4069
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ABSTRACT
The increase in demand for emerging technologies has also increased the presence of rare earth
elements and other lesser-known elements in the environment that were previously stable in the earth’s
crust. The aim of this study was to determine the current status of five rare earth elements such as
cerium (Ce), lanthanum (La), neodymium (Nd), praseodymium (Pr) and yttrium (Y), and barium (Ba),
niobium (Nb), rubidium (Rb), thorium (th) and zirconium (Zr), in superficial sediments from rivers of
northern, central and southern Chile. Data showed that the order of abundance of elements in the river
sediments was Ba > Nd > Pr > La > Ce > Zr > Rb > Y > Th > Nb. We found higher Ba, Ce, La, Nd and
Pr contents in northern and central Chile. Our findings showed that probably these chemical elements
are adsorbed into sediments, which could facilitate remobilization to the water column, thus being
more bioavailable to biota. Considering that rivers of northern and central Chile are usually used for
human consumption and irrigation purposes, further studies to understand the processes involved in the
recycling of elements in the watersheds are necessary. Our results may serve as a basis for environmental
impact studies that are required by the Chilean legislation before any productive investment.
CONFLICT OF INTEREST
The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
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