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Bed and suspended sediment-associated rare earth element concentrations and fluxes in a polluted Brazilian river system.
da Silva, Yuri Jacques Agra Bezerra; do Nascimento, Clístenes Williams Araújo; da Silva, Ygor Jacques Agra Bezerra; Amorim, Fábio Farias; Cantalice, José Ramon Barros; Singh, Vijay P; Collins, Adrian L.
Afiliação
  • 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.
  • Amorim FF; Agronomy Department, Federal Rural University of Pernambuco (UFRPE), Dom Manuel de Medeiros street, s/n - Dois Irmãos, Recife, PE, 52171-900, Brazil.
  • Cantalice JRB; Agronomy Department, Federal Rural University of Pernambuco (UFRPE), Dom Manuel de Medeiros street, s/n - Dois Irmãos, Recife, PE, 52171-900, Brazil.
  • Singh VP; Biological and Agricultural Engineering Department, Zachry Department of Civil Engineering, Texas A&M University, College Station, TX, 77843-2117, USA.
  • Collins AL; Sustainable Agriculture Sciences, Rothamsted Research, North Wyke, Okehampton, EX20 2SB, UK.
Environ Sci Pollut Res Int ; 25(34): 34426-34437, 2018 Dec.
Article em En | MEDLINE | ID: mdl-30306445
Rare earth elements (REEs) have been recently recognized as emergent pollutants in rivers. However, data regarding REE fluxes in association with either bed or suspended are scarce. To address this knowledge gap, we determined the concentrations and fluxes of La, Ce, Pr, Nd, Sm, Eu, Gd, Yb, Lu, Dy, Er, Ho, Tb, and Tm in bed and suspended sediment samples of a representative polluted Brazilian River. Sediment-associated data on REEs were placed in the context of corresponding background concentrations in soils under natural conditions along the Ipojuca watershed. Light rare earth elements (LREEs) comprised more than 94% of the total REEs associated with bed and suspended sediments. Suspended sediments accounted for more than 95% of the total REE flux. The Ce and Nd fluxes of about 7 t year-1 underscore the importance of including REEs in future estimations of global suspended sediment-associated element fluxes. In contrast, bedload often transported less than 0.0007 t year-1 of each REE. The main sources of pollution in the Ipojuca River are anthropogenic, likely due to domestic effluent and waste water from industrial and agricultural operations-major causes of sediment-associated Gd transport in polluted streams.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Poluentes Químicos da Água / Sedimentos Geológicos / Metais Terras Raras 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: 2018 Tipo de documento: Article País de afiliação: Brasil País de publicação: Alemanha
Texto completo
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Poluentes Químicos da Água / Sedimentos Geológicos / Metais Terras Raras 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: 2018 Tipo de documento: Article País de afiliação: Brasil País de publicação: Alemanha