Your browser doesn't support javascript.
loading
Geochemical signatures and natural background values of rare earth elements in soils of Brazilian Amazon.
Ferreira, Matheus da Silva; Fontes, Maurício Paulo Ferreira; Bellato, Carlos Roberto; Marques Neto, José de Oliveira; Lima, Hedinaldo Narciso; Fendorf, Scott.
Afiliação
  • Ferreira MDS; Department of Soil Science, Federal University of Viçosa, Viçosa, Minas Gerais, 36570-900, Brazil. Electronic address: matheus.s.ferreira@ufv.br.
  • Fontes MPF; Department of Soil Science, Federal University of Viçosa, Viçosa, Minas Gerais, 36570-900, Brazil. Electronic address: mpfontes@ufv.br.
  • Bellato CR; Department of Chemistry, Federal University of Viçosa, Viçosa, Minas Gerais, 36570-900, Brazil. Electronic address: bellato@ufv.br.
  • Marques Neto JO; Department of Chemistry, Federal University of Viçosa, Viçosa, Minas Gerais, 36570-900, Brazil. Electronic address: jose.o.neto@ufv.br.
  • Lima HN; Hedinaldo Narciso Lima, Department of Agricultural Engineering and Soils, Federal University of Amazonas, Manaus, Amazonas, 69080-900, Brazil. Electronic address: hedinaldo@ufam.edu.br.
  • Fendorf S; Scott Fendorf, Department of Earth System Science, Stanford University, Stanford, CA, 94305, USA. Electronic address: fendorf@stanford.edu.
Environ Pollut ; 277: 116743, 2021 May 15.
Article em En | MEDLINE | ID: mdl-33640811
Rare earth elements (REEs) are generally defined as a homogenous group of elements with similar physical-chemical properties, encompassing Y and Sc and the lanthanides elements series. Natural REEs contents in soils depend on the parent material, the soil genesis processes and can be gradually added to the soil by anthropogenic activities. The REEs have been considered emerging pollutants in several countries, so the establishment of regulatory guidelines is necessary to avoid environmental contamination. In Brazil, REE soils data are restricted to some regions, and knowledge about them in the Amazon soils is scarce, although this biome covers more than 40% of the Brazilian territory. Thus, the objectives of this study were to determine the REE content in soils of two hydrographic basins (Solimões and Rio Negro) of the Amazon biome, establish their Quality Reference Values (QRV) and to investigate the existence of enrichment of REEs in urban soils. The ΣREE(Y + Sc) content of Solimões surface samples was 109.28 mg kg-1 and the ΣREE(Y + Sc) content in the subsurface samples was 94.11 mg kg-1. In soils of Rio Negro basin, the ΣREE(Y + Sc) was 43.95 15 mg kg-1 surface samples and 38.40 mg kg-1 in subsurface samples. The ΣREE(Y + Sc) in urban topsoils samples was 38.62 mg kg-1. The REEs contents pattern in three studied areas are influenced in different amplitude by natural soil properties. The REEs content in urban topsoils were slightly higher than the Rio Negro pristine soils, but the ecological risk was low. QRVs recommend for Solimões soils ranged from 0.01 (Lu) to 145.6 mg kg-1 (Ce) and for Rio Negro soils ranged from 0.05 (Lu) to 15.8 mg kg-1 (Ce).
Assuntos
Palavras-chave
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Poluentes do Solo / Metais Terras Raras País/Região como assunto: America do sul / Brasil Idioma: En Revista: Environ Pollut Assunto da revista: SAUDE AMBIENTAL Ano de publicação: 2021 Tipo de documento: Article País de publicação: Reino Unido
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Poluentes do Solo / Metais Terras Raras País/Região como assunto: America do sul / Brasil Idioma: En Revista: Environ Pollut Assunto da revista: SAUDE AMBIENTAL Ano de publicação: 2021 Tipo de documento: Article País de publicação: Reino Unido