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210PO en organismos marinos consumidos por la población sevillana

Authors: Díaz-Francés, Inmaculada; Mantero, Juan; Manjón, Guillermo; García-Tenorio, R.;

210PO en organismos marinos consumidos por la población sevillana

Abstract

[ES]: El 210Po es un radionucleido de la serie natural del uranio presente en los distintos compartimentos naturales y que se caracteriza por presentar una alta radiotóxicidad y tener un comportamiento bioacumulativo en determinados tejidos en seres vivos. Por lo tanto, contribuiye a la dosis recibida en organismos del medio marino y, consecuentemente tras su ingesta, a las dosis por ingestión en la población que los consuma. Este trabajo muestra la dosis asociada a dicho consumo sobre un amplio espectro de especies marinas frecuentemente consumidas en Sevilla. Las muestras fueron cocinadas en la forma habitual de consumo y tras este proceso, se ha llevado a cabo un proceso de digestión mediante microondas con una posterior medida del 210Po por espectrometría alfa. Los valores de 210Po encontrados varían hasta en tres órdenes de magnitud (desde 0,09±0,01 Bq/kg peso húmedo en sepia preparada a la plancha hasta 140±4 Bqkg-1 en boquerones en vinagre) generando estos últimos una dosis de 340 Sv/año estimada sobre la base de un consumo típico de esta especie. Los resultados obtenidos ponen de manifiesto las altas concentraciones de 210Po en algunas especies marinas consumidas con asiduidad por la población sevillana que son, por otra parte, en la mayoría de los casos uno o varios órdenes de magnitud superiores a las determinadas para otros radionucleidos pertenecientes a su misma serie radiactiva natural como los isótopos de Uranio (234U y 238U). Ello, unido a su alta radiotoxicidad, convierte al 210Po en el radionucleido natural que contribuye en mayor proporción a la dosis por ingestión recibida por la población sevillana debida al consumo de estos productos.

[EN]: 210Po is a natural radionuclide belonging to the uranium series that can be found in different conpartments in the environment. It is characterized for presenting a high radiotoxicity and a bioaccumulative behavior in some biological tissues. This is why it contributes strongly to the dose received by marine organisms, and consequently after consumption, to the ingestion dose in the population that consume them. This work shows the doses ssociated with this consumption on a wide range of marine species frequently consumed in Seville. The samples were cooked in the usual way they are ingested. After this process, a microwave digestion was carried out followed by a final measurement of 210Po via alpha spectrometry. The values found for 210Po range up to three orders of magnitude (from 0.09 ± 0.01 Bqkg-1 wet weight in prepared grilled cuttlefish to 140 ± 4 Bqkg-1 in anchovies in vinegar) generating the last one a dose of 340 Sv/year, estimated on the basis of a typical consumption of this species. With these results, it is proved the high concentrations of 210Po in marine species regularly consumed by the population of Seville. Compared to other radionuclides belonging to the same natural radioactive series, uranium isotopes (234U and 238U) has, in most cases, one or several orders of magnitude lower concentrations than polonium isotopes. This fact together with the high radiotoxicity of polonium, makes the 210Po as the natural radionuclide that contributes the most to the ingestion dose received by the population of Seville due to consumption of these products.

Trabajo presentado al 2º congreso conjunto de las Sociedades Españolas de Física Médica y de Protección Radiológica (XVIII Congreso Nacional SEFM/XIII Congreso Nacional de SEPR) celebrado en Sevilla del 10 al 13 de Mayo de 2011.

Peer reviewed

Country
Spain
Related Organizations
Keywords

Polonium, Ingestion doses, Bioacumulación, Organismos marinos, Marine biota, Polonio

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selected citations
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This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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