Distribution and annual committed effective dose assessment of 210Po in popular marine species at the near-shore Binh Thuan province, Vietnam

Thanh-Nam Nguyen^a,b, Thanh-Duong Nguyen^c, Van-Hao Duong^c,*, Tai-Tue Nguyen^d,e

^aFaculty of Biology, University of Science, Vietnam National University, Hanoi 100000, Viet Nam

^bCenter for Life Science Research (CELIFE), University of Science, Vietnam National University, Hanoi 100000, Viet Nam

^cHanoi University of Mining and Geology (HUMG), Hanoi 100000, Viet Nam

^dKey Laboratory of Geoenvironment and Climate Change Response, University of Science, Vietnam National University, Hanoi 100000, Viet Nam

^eFaculty of Geology, University of Science, Vietnam National University, Hanoi 100000, Viet Nam

Abstract:

²¹⁰Po concentration in thirty popular marine species (twenty five fishes, four bivalves and one crab) with different habitats, feeding types, and trophic levels at the near-shore Binh Thuan, Vietnam was analyzed using the alpha detectors. The ²¹⁰Po activities were widely ranged from 3.07 ± 0.18 in a fish species (Bumpnose trevally) to 78.6 ±5.3 Bq/kg w.w in a bivalve species (Green mussel) with the average value of 16.6 Bq/kg w.w. The results showed that the species with lower trophic level value have higher ²¹⁰Po concentration. Regarding the feeding types, the ²¹⁰Po concentration in the omnivorous species is about 2.9 times higher than in the carnivorous species. The species living in demersal zone accumulated a high ²¹⁰Po in comparison with species living in reef-associated and pelagic-neritic zones. The calculated annual committed effective dose from ²¹⁰Po due to the ingestion of seafood from demersal zone and bivalve species of the area was significant high.

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