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Thallium in aquatic environments and the factors controlling Tl behavior

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Abstract

Although thallium (Tl) usually exists in a very low level in the natural environment, it is highly toxic. With the development of mining and metallurgical industry and the wide application of Tl in the field of high technologies, Tl poses an increasing threat to the ecological environment and human health. This paper summarizes the research results of the toxicity of Tl as well as the distribution, occurrence forms, migration, and transformation mechanism of Tl in rivers, lakes, mining areas, estuaries, coastal waters, and oceans. It also discusses the influence mechanisms of pH, redox potential, suspended particulate matters, photochemical reaction, natural minerals, cation/anion, organic matters, and microorganisms on the environmental behavior of Tl. This paper points out the shortcomings of Tl research methods in water environment, and looks forward to the future development directions: First, the technology for separating Tl(III) and Tl(I) is still immature, especially it is difficult to effectively separate Tl(III) and Tl(I) in seawater. Second, the development of many advanced in situ detection technologies will bring great convenience to the studies of the dynamic mechanisms of Tl migration and transformation in the environments. Third, adsorption is the most effective mechanism to remove Tl from water, in which modified metal oxides or macrocyclic organic compounds have high application potential.

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Funding

This study was supported by the Natural Science Foundation of Shandong Province, China (ZR2020MD074).

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Wen Zhuang: Investigation, resources, data curation, writing−original draft and editing. Jinming Song: Conceptualization, methodology, supervision, writing−review and editing.

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Correspondence to Wen Zhuang or Jinming Song.

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The authors declare no competing interests.

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Responsible Editor: Christian Gagnon

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Zhuang, W., Song, J. Thallium in aquatic environments and the factors controlling Tl behavior . Environ Sci Pollut Res 28, 35472–35487 (2021). https://doi.org/10.1007/s11356-021-14388-2

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  • DOI: https://doi.org/10.1007/s11356-021-14388-2

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