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<p>Management of radon emissions from uranium tailings ponds is crucial for public safety. Calcium lignosulfonate (CaLS)-modified red clay is explored as a radon mitigation material in this study. Experiments showed that a 6% CaLS concentration with a three-day curing period optimized radon adsorption, reduced exhalation rates by 30–47% and blocked up to 98.9% of radon. This modification also enhanced the soil strength. The use of CaLS-modified red clay in tailings dams significantly reduced radon emissions, and lowered health risks.</p>

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Experimental study on the efficiency of calcium lignosulfonate-modified red clay for radon mitigation

  • 期刊论文

  • 发表日期：

    2025年3月11日

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  • Yonghong Liu,
  • Changshou Hong,
  • Shao Li,
  • Jiayi Xin,
  • De Huang

摘要

Management of radon emissions from uranium tailings ponds is crucial for public safety. Calcium lignosulfonate (CaLS)-modified red clay is explored as a radon mitigation material in this study. Experiments showed that a 6% CaLS concentration with a three-day curing period optimized radon adsorption, reduced exhalation rates by 30–47% and blocked up to 98.9% of radon. This modification also enhanced the soil strength. The use of CaLS-modified red clay in tailings dams significantly reduced radon emissions, and lowered health risks.