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Thorium content in soil, water and sediment samples and fluvial sediment-associated transport in a catchment system with a semiarid-coastal interface, Brazil.
Nascimento, Rennan Cabral; da Silva, Yuri Jacques Agra Bezerra; do Nascimento, Clístenes Williams Araújo; da Silva, Ygor Jacques Agra Bezerra; da Silva, Rayanna Jacques Agra Bezerra; Collins, Adrian L.
Afiliação
  • Nascimento RC; Agronomy Department, Federal Rural University of Pernambuco (UFRPE), Dom Manuel de Medeiros Street, s/n, Dois Irmãos, Recife, PE, 52171-900, Brazil.
  • da Silva YJAB; Agronomy Department, Federal University of Piaui (UFPI), Planalto horizonte, Bom Jesus, PI, 64900-000, Brazil. yurijacques@ufpi.edu.br.
  • do Nascimento CWA; Agronomy Department, Federal Rural University of Pernambuco (UFRPE), Dom Manuel de Medeiros Street, s/n, Dois Irmãos, Recife, PE, 52171-900, Brazil.
  • da Silva YJAB; Agronomy Department, Federal Rural University of Pernambuco (UFRPE), Dom Manuel de Medeiros Street, s/n, Dois Irmãos, Recife, PE, 52171-900, Brazil.
  • da Silva RJAB; Agronomy Department, Federal Rural University of Pernambuco (UFRPE), Dom Manuel de Medeiros Street, s/n, Dois Irmãos, Recife, PE, 52171-900, Brazil.
  • Collins AL; Sustainable Agriculture Sciences, Rothamsted Research, North Wyke, Okehampton, EX20 2SB, UK.
Environ Sci Pollut Res Int ; 26(32): 33532-33540, 2019 Nov.
Article em En | MEDLINE | ID: mdl-31578680
Thorium (Th) is one of the main sources of natural radiation to ecosystems. However, data regarding Th concentrations in rocks, soil, water and sediments are currently scarce. Accordingly, this study aimed to establish background concentrations and quality reference values (QRVs) for Th in the environmentally impacted Ipojuca River catchment in Brazil, where the weathering of granites releases Th into the environment. Additionally, the study aimed to calculate Th fluxes in water, and both bed and suspended sediment. The mean Th concentration in the study catchment soils was 28.6 mg kg-1. The QRV for Th was estimated to be 21 mg kg-1 and 86.3 Bq kg-1. Bed and suspended sediment-associated concentrations ranged from 2.8 to 32.9 mg kg-1. Suspended sediment-associated discharge (3.42 t year-1) accounted for more than 99% of the total Th flux, while the dissolved phase transport was negligible in comparison. At the downstream cross section in the study catchment, suspended sediment samples exhibited Th concentrations similar to those observed in rivers impacted by mining activities. The discharge of sediment to the ocean from the study area is mainly triggered by soil erosion processes in the hotspot region (middle-inferior course). It is essential to identify Th hotspots before establishing environmental policies regarding human health and environmental protection.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Monitoramento Ambiental / Tório / Poluentes Ambientais Tipo de estudo: Risk_factors_studies País/Região como assunto: America do sul / Brasil Idioma: En Revista: Environ Sci Pollut Res Int Assunto da revista: SAUDE AMBIENTAL / TOXICOLOGIA Ano de publicação: 2019 Tipo de documento: Article País de afiliação: Brasil País de publicação: Alemanha
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Monitoramento Ambiental / Tório / Poluentes Ambientais Tipo de estudo: Risk_factors_studies País/Região como assunto: America do sul / Brasil Idioma: En Revista: Environ Sci Pollut Res Int Assunto da revista: SAUDE AMBIENTAL / TOXICOLOGIA Ano de publicação: 2019 Tipo de documento: Article País de afiliação: Brasil País de publicação: Alemanha