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<p>The study examined the concentrations of <sup>210</sup>Po and <sup>210</sup>Pb in various marine finfish from the Cochin Islands in Kerala. The findings revealed that pelagic fish had higher levels of <sup>210</sup>Po, while bottom-dwelling species showed increased concentrations of <sup>210</sup>Pb. The overall activity concentrations ranged from 12.6 ± 1.6 to 56.3 ± 2.8&#xa0;Bq&#xa0;kg⁻<sup>1</sup> for <sup>210</sup>Po and from 9.0 ± 0.5 to 52.1 ± 2.8&#xa0;Bq&#xa0;kg⁻<sup>1</sup> for <sup>210</sup>Pb. Among the species studied, pelagic planktivores, such as <i>Escualosa thoracata</i>, exhibited the highest concentrations and bioaccumulation factors. The ratios of <sup>210</sup>Po to <sup>210</sup>Pb were greater than 1 in pelagic species, but less than 1 in bottom-dwelling species. Activity concentrations of <sup>210</sup>Po and <sup>210</sup>Pb varied significantly according to taxonomy, environment, and feeding habits, but no significant differences were observed between sampling stations. The annual committed effective doses (ACEDs) for both radionuclides fell within the ICRP safety limits of 1–20&#xa0;mSv y⁻<sup>1</sup>, indicating minimal health risks associated with fish consumption.</p>

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Analysis of 210Po and 210Pb in finfishes from Cochin Islands: health risk implications

  • 期刊论文

  • 发表日期：

    2025年5月8日

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  • Jayaseeli Malar Adaikalam,
  • Mohan Feroz Khan

摘要

The study examined the concentrations of 210Po and 210Pb in various marine finfish from the Cochin Islands in Kerala. The findings revealed that pelagic fish had higher levels of 210Po, while bottom-dwelling species showed increased concentrations of 210Pb. The overall activity concentrations ranged from 12.6 ± 1.6 to 56.3 ± 2.8 Bq kg⁻1 for 210Po and from 9.0 ± 0.5 to 52.1 ± 2.8 Bq kg⁻1 for 210Pb. Among the species studied, pelagic planktivores, such as Escualosa thoracata, exhibited the highest concentrations and bioaccumulation factors. The ratios of 210Po to 210Pb were greater than 1 in pelagic species, but less than 1 in bottom-dwelling species. Activity concentrations of 210Po and 210Pb varied significantly according to taxonomy, environment, and feeding habits, but no significant differences were observed between sampling stations. The annual committed effective doses (ACEDs) for both radionuclides fell within the ICRP safety limits of 1–20 mSv y⁻1, indicating minimal health risks associated with fish consumption.