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Rising temperatures decrease rare earth element bioavailability and ecological risk in coastal sediments

文献类型: 外文期刊

作者: Gu, Yang-Guang 1 ; Gao, Yanpeng 2 ; Jordan, Richard W. 3 ; Jiang, Shi-Jun 4 ; Huang, Hong-Hui 1 ;

作者机构: 1.Chinese Acad Fishery Sci, South China Sea Fisheries Res Inst, Guangdong Prov Key Lab Fishery Ecol & Environm, Guangzhou 510300, Peoples R China

2.Guangdong Univ Technol, Inst Environm Hlth & Pollut Control, Guangzhou 510006, Peoples R China

3.Yamagata Univ, Fac Sci, Yamagata 9908560, Japan

4.Hainan Univ, State Key Lab Marine Resource Utilizat South China, Haikou 570228, Peoples R China

关键词: Rare earth elements; Bioavailability; Ecotoxicological risk; Temperature effects; Diffusive gradients in thin films; Coastal sediments

期刊名称:ENVIRONMENTAL CHEMISTRY LETTERS ( 影响因子:20.4; 五年影响因子:18.9 )

ISSN: 1610-3653

年卷期: 2025 年

页码:

收录情况: SCI

摘要: Rare earth elements are sedimentary pollutants of increasing health concern, yet the effect of global warming on their bioavailability and toxicity is unknown. To test this, we applied the diffusive gradients in thin films technique to assess the bioavailability of 15 rare earth elements, including lanthanides and yttrium, in sediments at temperatures ranging from 0 to 40 degrees C. We modeled the ecotoxicological risk to aquatic organisms using the species sensitivity distribution-probabilistic risk assessment-inclusion-exclusion principle. Results show that the bioavailability of all rare earth elements decreases by 40% to 70% as temperature increases from 0 to 40 degrees C, indicating reduced mobility and enhanced sediment adsorption. Similarly, the calculated ecotoxicological risk is reduced from 1.75 to 0.08%. This is the first evidence of temperature-driven attenuation of rare earth element risk in sediments, suggesting that global warming should decrease the toxicity of some rare earth elements.

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