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<p>The objective of this study is to investigate the distribution of natural and artificial radionuclides among different particle size fractions of the sediment samples collected from the coastal region surrounding Tarapur Atomic Power Station, India. The collected sediment samples were divided into different size fractions, followed by radioactivity measurement using gamma spectrometry with an HPGe detector system. The radioactivity concentration in different size fractions was correlated with the physicochemical parameters, including pH, organic matter content, CEC, elemental composition (such as percentage nitrogen, carbon, and hydrogen), and sediment distribution coefficient (K<sub>d</sub>). No significant correlation between radionuclide activity and particle size fractions was found, suggesting that the physical factors, such as surface area and particle sizes, are not the prime factors controlling the radionuclide distribution in the sediment at Tarapur coastal line. The distribution was uneven across different size fractions, but some radionuclide activities correlated positively with physicochemical parameters. The findings of the study emphasize focusing on sediment chemistry rather than granulometry for understanding radionuclide behavior, which is critical for environmental monitoring and risk assessment.</p>

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Particle size distribution of radionuclides in sediment samples near Tarapur site, India and their correlation with physicochemical parameters

  • 期刊论文

  • 发表日期：

    2026年2月19日

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  • Pratibha,
  • A. Baburajan,
  • R. H. Gaikwad,
  • I. V. Saradhi,
  • A. Vinod Kumar

摘要

The objective of this study is to investigate the distribution of natural and artificial radionuclides among different particle size fractions of the sediment samples collected from the coastal region surrounding Tarapur Atomic Power Station, India. The collected sediment samples were divided into different size fractions, followed by radioactivity measurement using gamma spectrometry with an HPGe detector system. The radioactivity concentration in different size fractions was correlated with the physicochemical parameters, including pH, organic matter content, CEC, elemental composition (such as percentage nitrogen, carbon, and hydrogen), and sediment distribution coefficient (Kd). No significant correlation between radionuclide activity and particle size fractions was found, suggesting that the physical factors, such as surface area and particle sizes, are not the prime factors controlling the radionuclide distribution in the sediment at Tarapur coastal line. The distribution was uneven across different size fractions, but some radionuclide activities correlated positively with physicochemical parameters. The findings of the study emphasize focusing on sediment chemistry rather than granulometry for understanding radionuclide behavior, which is critical for environmental monitoring and risk assessment.