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<p>The performance of TK100 resin was evaluated for the rapid and selective preconcentration of <sup>226</sup>Ra for environmental water matrices. High radium uptake was observed in 0.01&#xa0;M HNO<sub>3</sub> and 0.01&#xa0;M HCl, with weight distribution ratio above 1000&#xa0;mL·g<sup>−1</sup>, and &gt; 95% retention achieved within 15&#xa0;min. Adsorption decreased significantly at ≥ 0.1&#xa0;M HNO<sub>3</sub> and 0.1&#xa0;M HCl, with D<sub>w</sub> values decreasing from the order of 10<sup>3</sup> to 10&#xa0;mL·g<sup>−1</sup>. A similar decline was observed at high salinity, defining the operational matrix limits. Column tests confirmed that &gt; 90% of <sup>226</sup>Ra was eluted with 10–15&#xa0;mL of 0.1&#xa0;M acid (HNO<sub>3</sub>, HCl). These findings demonstrate the suitability of TK100 for routine preconcentration of <sup>226</sup>Ra in routine environmental monitoring.</p>

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Performance assessment of TK100 resin for rapid and selective radium retention from environmental waters

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年5月8日

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  • M. Gongora,
  • J. Martínez,
  • A. Peñalver,
  • C. Aguilar,
  • F. Borrull

摘要

The performance of TK100 resin was evaluated for the rapid and selective preconcentration of 226Ra for environmental water matrices. High radium uptake was observed in 0.01 M HNO3 and 0.01 M HCl, with weight distribution ratio above 1000 mL·g−1, and > 95% retention achieved within 15 min. Adsorption decreased significantly at ≥ 0.1 M HNO3 and 0.1 M HCl, with Dw values decreasing from the order of 103 to 10 mL·g−1. A similar decline was observed at high salinity, defining the operational matrix limits. Column tests confirmed that > 90% of 226Ra was eluted with 10–15 mL of 0.1 M acid (HNO3, HCl). These findings demonstrate the suitability of TK100 for routine preconcentration of 226Ra in routine environmental monitoring.