Assessment of Sr-90, Cs-137, natural radionuclides and metals in marine fish species consumed in the city of São Paulo - Brazil
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2018
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INTERNATIONAL SYMPOSIUM ON NUCLEAR AND ENVIRONMENTAL RADIOCHEMICAL ANALYSIS, 13th
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The study of artificial radionuclides dispersion into the environment is very important to control the
nuclear waste discharges, nuclear accidents and nuclear weapons testing. The accident in Fukushima
Daiichi Nuclear Power Plant on 11 March 2011, released several radionuclides in the marine
environment by aerial deposition and liquid discharge, with various level of radioactivity. The 90Sr
and 137Cs were two of the elements released into the environment, 90Sr is estimated that its
atmospheric releases ranged from 3.3.10-3 to 0.14 PBq, and 137Cs is estimated that its atmospheric
releases ranged from 7 to 20 PBq. The 90Sr and 137Cs are produced by nuclear fission with a physical
half-life of 28.79 years and 30.15 years, respectively. The natural radionuclides (210Pb, 226Ra and
228Ra) were determined to check the reference values. The concentrations of metals were determined
to compare with the values of the maximum limits of the regulation.
The aim of this study is to quantify the concentration of the 90Sr, 137Cs, natural radionuclides and
metals in the muscles of marine fish species most consumed in São Paulo city. The species and
scientific names of the fishes analyzed were bluefish (pomatomus saltatrix), croaker (micropogonias
furnieri), hake (merluccius merluccius), Smooth-hounds nei (Mustelus spp.), sardine (sardinella
brasiliensis) and mullet (Mugil brasiliensis). The determination of 90Sr by liquid scintillation counting
(LSC) measurement was performed using a 1220 Quantulus™ Ultra Low Level Liquid Scintillation
Spectrometer. The 137Cs and natural radionuclides were measured by gamma spectrometry, using an
HPGe detector. The metals concentration was determined by instrumental neutron activation analysis
(INAA).
The results obtained in this study can be used to ensure the quality of the fish consumed in the São
Paulo city.
Como referenciar
NISTI, M.B.; SAUEIA, C.H.R.; CASTILHO, B.; MAZZILLI, B.P. Assessment of Sr-90, Cs-137, natural radionuclides and metals in marine fish species consumed in the city of São Paulo - Brazil. In: INTERNATIONAL SYMPOSIUM ON NUCLEAR AND ENVIRONMENTAL RADIOCHEMICAL ANALYSIS, 13th, September 17-20, 2018, Cambridge, UK. Abstract... p. 68-68. Disponível em: http://repositorio.ipen.br/handle/123456789/30102. Acesso em: 24 Mar 2026.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.