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BIBTEX RIS

Determinação da composição isotópica de estrôncio em águas naturais: exemplos de sua aplicação em águas subsuperficiais da zona costeira na região Bragantina-PA

2007; Brazilian Chemical Society; Volume: 30; Issue: 4 Linguagem: Inglês

10.1590/s0100-40422007000400012

ISSN

1678-7064

Autores

Adriana Oliveira Bordalo, Cândido Augusto Veloso Moura, T. Scheller,

Tópico(s)

Water Quality and Pollution Assessment

Resumo

ZONE OF BRAGANTINA REGION, PARÁ.Analytical procedures used for determining the concentrations and isotope composition of strontium in subsurface waters, by mass spectrometry, are described.Sampling was performed in coastal plateaus, salt marsh and mangrove environments in the coastal region of Pará.Coastal plateau waters have δ 87 Sr between 1.51 and 6.26‰ and Sr concentration bellow 58 ppb.Salt marsh waters show δ 87 Sr between 0.55 and 0.90‰ and Sr concentration between 93 and 114 ppm, while mangrove waters have δ 87 Sr‰ around zero and Sr concentration above 15 ppm.Differences in the 87 Sr/ 86 Sr ratio in these subsurface waters are detected, as well as seasonal variations in the coastal pleteau waters.

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