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<p>Soil-soil solution distribution coefficients (<i>K</i><sub>d</sub>) for <sup>137</sup>Cs in soils (Andosol, Fluvisol, and Cambisol) from two different temperature regions in Japan were measured. The results showed that the <i>K</i><sub>d</sub> values did not differ significantly between warmer and cooler regions for Fluvisol and Cambisol samples, while Andosol samples showed a small but statistically significant regional difference (geometric means: 4.7 × 10<sup>3</sup> L&#xa0;kg<sup>–1</sup> in the cooler region and 2.0 × 10<sup>3</sup> L&#xa0;kg<sup>–1</sup> in the warmer region). Correlation analysis revealed that <i>K</i><sub>d</sub> was mainly affected by exchangeable K, water content, and pH, suggesting that site-specific soil characteristics have a greater impact on radiocesium mobility than temperature differences.</p>

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Comparison of soil-soil solution distribution coefficients of 137Cs using agricultural soils collected from two different temperature regions in Japan

  • 期刊论文

  • 发表日期：

    2026年3月5日

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  • Sergei Danilov,
  • Keiko Tagami,
  • Shigeo Uchida

摘要

Soil-soil solution distribution coefficients (Kd) for 137Cs in soils (Andosol, Fluvisol, and Cambisol) from two different temperature regions in Japan were measured. The results showed that the Kd values did not differ significantly between warmer and cooler regions for Fluvisol and Cambisol samples, while Andosol samples showed a small but statistically significant regional difference (geometric means: 4.7 × 103 L kg–1 in the cooler region and 2.0 × 103 L kg–1 in the warmer region). Correlation analysis revealed that Kd was mainly affected by exchangeable K, water content, and pH, suggesting that site-specific soil characteristics have a greater impact on radiocesium mobility than temperature differences.