Evaluation of the radiological dose due to 210Po in commercial clupeid fish collected in the near-shore environment of the high background natural radiation area (HBNRA) on the southwest coast of India

Monitoring 210Po and 210Pb in Some Pelagic Fishes Collected from Malabar Coast of India

“…Populations of small pelagic fish can be adversely affected by a number of factors including food competition, predation at different levels and pollution of coastal waters (James, 2010). Among the different fish species, clupidae have been found to accumulate the most radionuclides which is concordant with the literature values (Sabu et al, 2022). Morwoto et al, (2022) reported a range of 46.4 to 251.6 Bq kg -1 for 210 Po in different pelagic fishes recently from Indonesia which is found higher than our findings.…”

“…Most of the fish's muscle tissue is consumed by humans, which should require a lower 210 Po activity concentration. The annual committed effective dose (CED) was calculated according to the formula published by Sabu et al (2022). The daily intake of radionuclides was determined by multiplying the corresponding element content by the typical daily consumption of each fish species (determined using the household expenditure method; IAEA, 1989).…”

“…After 5 hrs, the activity level of 210 Po was determined using the silver disc counted by alpha spectrophotometry with a limit of detection of 0.3 Bqkg -1 . This technique was used with minor modifications from Sabu et al (2022) and the IAEA-MEL method (IAEA, 1995). The remaining solution was kept for 6 months for the ingrowth of 210 Po from 210 Pb.…”

“…Numerous studies have reported the concentration of 210 Po and 210 Pb in various marine biota around the World (Gouvea et al, 1992;Lubnaet al, 2011;Uddin et al, 2012;Ahmed et al, 2021). In India, several authors have reported 210 Po and 210 Pb concentrations in shellfishes and fin fishes from south-east coast, Gulf of Mannar and Manavalakuruchi (Saiyad and Krishnamoorthy, 2012;Rani et al, 2014;Wesley, 2011, 2016;Khot et al, 2018;Pillai et al, 2019;Sivaperumal et al, 2020;Sabu et al,2022). Due to the enhanced bioaccumulation of 210 Po in the edible flesh of marine life, especially fish, humans are exposed to it through daily ingestion over a long period of time.…”