期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 367, 期 -, 页码 706-714出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2019.01.027
关键词
Natural radioactivity; Bivalve molluscs; Geographical origin; Fingerprinting; Dosimetric evaluation
The presence of natural and artificial radionuclides in the marine environment produces the accumulation of radionuclides in bivalve molluscs consumed by humans, and therefore it could result in a radiological hazard. In this study, the activity concentrations of Po-210, K-40, Pb-210 and Th-234 were determined in different types of bivalve molluscs sampled during the period of May 2014-June 2015, along coastal areas from the Andalusian region (South of Spain), through alpha-particle spectrometry and low-level gamma-ray spectrometry. The activity concentrations of Po-210; K-40; Pb-210 and Th-234 varied between 40 +/- 2 and 515 +/- 9 Bq kg(-1) dry weight (d.w.); 121 +/- 7 and 674 +/- 34 Bq kg(-1) d.w.; ND (lower than limit of detection) and 73 10 Bq kg(-1) d.w.; and ND and 126 +/- 27 Bq kg(-1) d.w., respectively. The committed effective dose to humans was calculated to range from 41 to 479 mu Sv year(-1). Both activity concentrations and dose levels were comparable to previous studies from other countries. Finally, a multivariate statistical analysis of natural radioactivity content allowed the discrimination between bivalve molluscs from Atlantic and Mediterranean coasts.
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