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<p>Thallium (Tl) is a rare and toxic metal present in the Earth’s crust. Its geochemical behavior and mobility closely resemble those of potassium (K). The concentration of Tl in uncontaminated soil typically does not surpass 1 mg/kg. The development and utilization of Tl-containing resources, such as ore mining and cement production, contribute significantly to the contamination of the soil through the release of substantial amounts of Tl. The soil Tl content in severely polluted mining areas can exceed 100 mg/kg, leading to regional Tl pollution and posing a serious threat to the environment and health. Thallium can be readily absorbed by plants, particularly crops, and subsequently enter the human body through the food chain, leading to potential health risks. Currently, comprehensive overview of the entire environmental process of Tl in soil-plant systems remains limited, particularly regarding its migration, accumulation, uptake, detoxification, and remediation mechanisms. Herein, the underlying mechanisms of Tl migration and accumulation within the soil-plant system and the Tl detoxification mechanisms in plants and ecological remediation of contaminated sites were fully elucidated. The review could provide theoretical foundations for future ecological restoration technologies targeting Tl-contaminated soils.</p>

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Environmental Behavior and Migration Accumulation of Thallium in Soil and Plant Systems

  • 期刊论文

  • 发表日期：

    2025年10月17日

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  • Yanying Li,
  • Yisheng Ye,
  • Qiang Zhang,
  • Hongxia Zhu,
  • Mo Xu,
  • Qingning Zhang,
  • Yue Hu

摘要

Thallium (Tl) is a rare and toxic metal present in the Earth’s crust. Its geochemical behavior and mobility closely resemble those of potassium (K). The concentration of Tl in uncontaminated soil typically does not surpass 1 mg/kg. The development and utilization of Tl-containing resources, such as ore mining and cement production, contribute significantly to the contamination of the soil through the release of substantial amounts of Tl. The soil Tl content in severely polluted mining areas can exceed 100 mg/kg, leading to regional Tl pollution and posing a serious threat to the environment and health. Thallium can be readily absorbed by plants, particularly crops, and subsequently enter the human body through the food chain, leading to potential health risks. Currently, comprehensive overview of the entire environmental process of Tl in soil-plant systems remains limited, particularly regarding its migration, accumulation, uptake, detoxification, and remediation mechanisms. Herein, the underlying mechanisms of Tl migration and accumulation within the soil-plant system and the Tl detoxification mechanisms in plants and ecological remediation of contaminated sites were fully elucidated. The review could provide theoretical foundations for future ecological restoration technologies targeting Tl-contaminated soils.