Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/72513
Título: | Geo-accumulation indexes of trace elements in sediments from uranium environments (Central Portugal) |
Autor(es): | Antunes, Isabel Margarida Horta Ribeiro Teixeira, Rui Valente, Teresa Maria Fernandes Santos, António |
Palavras-chave: | U-mines stream sediments Contamination indexes Portugal nanomineralogy |
Data: | 2019 |
Editora: | Springer Nature |
Resumo(s): | Stream sediments are usually used as a tool for contamination evaluation. The studied area is an abandoned uranium mine located in Central Portugal, in a not steep area, with altitudes ranging from 360 to 380 m. Geoaccumulation index and contamination factor have been used in the as-sessment of the degree of contamination of stream sediments with toxic metals. The stream sediments are heavily to extremely contaminated in U and Th and moderately to heavily contaminated in As and W. The contami-nation factor is moderate for Al, Cu and Pb, considerably contaminated for As and W, and very highly contaminated for U and Th. The degree of con-tamination is very high. The contamination of stream sediments is mainly related to the erosion and leaching of the mine dumps located in the study area. Furthermore, the con-taminant concentrations tend to decrease downstream of the source, due to hydrodynamic and chemical processes in fluvial systems affected by the mine drainage. |
Tipo: | Artigo em ata de conferência |
URI: | https://hdl.handle.net/1822/72513 |
Arbitragem científica: | yes |
Acesso: | Acesso restrito UMinho |
Aparece nas coleções: | CCT - Comunicações/Communications |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
---|---|---|---|---|
Antunes et al_2019_AJG.pdf Acesso restrito! | 226,71 kB | Adobe PDF | Ver/Abrir |