Bioaccumulation of natural radionuclides in molluscs from the Ebro Delta area
- 203 Downloads
210Po, 210Pb, 234U, 238U, 232Th and 230Th were analysed in the edible part of four different species of bivalves typically produced and consumed in the Ebro Delta area. The results show that the main contributor to the radioactive content in these species was 210Po, with values ranging between 263.1 ± 26.6 and 813.0 ± 72.9 Bq/kg (d.w.), which are higher than the usual reported activity levels in other geographical areas. This can probably be attributed to the activities of a phosphate industrial plant located upstream on the Ebro River, which may lead to enhanced levels of naturally occurring radioactive isotopes in the aquatic ecosystem. To determine the possible impact on health, the committed effective doses through the consumption of the different species were evaluated and the cumulative total annual effective dose for their consumption was estimated to 187.6 μSv/year, which is in the range of 200–1000 μSv/year given by UNSCEAR.
KeywordsNatural radionuclides Molluscs Annual ingestion doses
- AESSAN (Agencia Española de Seguridad Alimentaria y Nutrición; Ministerio de Sanidad; Servicios Sociales e Igualdad) (2011) Tablas ENIDE. http://aesan.msssi.gob.es/AESAN/web/evaluacion_riesgos/seccion/datos_consumo.shtml. Accessed 2 Sept 2015
- IAEA (2003) International basic safety standard for protection against ionizing radiations and for the safety of radiation sources. IAEA, ViennaGoogle Scholar
- Raja P, Shahul Hameed P (2010) Study on the distribution and bioaccumulation of natural radionuclides, Po-210 and Pb-210 in Parangipettai Coast, South East Coast of India. Indian. J Mar Sci 39:449–455Google Scholar
- UNSCEAR (2008) United Nations Scientific Committee on the Effects of Atomic Radiation UNSCEAR 2008 Report to the General Assembly, with scientific annexesGoogle Scholar