Acid-resistant bismuth-doped antimony for effective Sr2+ adsorption in nitric acid solutions

IF 7.7 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Environmental Research Pub Date : 2025-03-29 DOI:10.1016/j.envres.2025.121476

Yifu Hu, Zhi Cao, Zhongwei Yuan, Wentao Wang, Qi Chen, Guoan Ye, Taihong Yan

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Abstract

⁹⁰Sr, a radioactive fission product in high-level liquid waste (HLLW), poses long-term environmental risks due to potential waterborne dispersion. A bismuth-doped Sb₂O₅ material (BiSb-0.1) was synthesized in this work to effectively remove strontium from simulated high-level liquid waste (HLLW). The maximum adsorption capacity attained 51.69 mg/g for Sr²⁺ in a 0.1 mol/L HNO₃ solution. The adsorption data were well-fitted by the pseudo-second-order kinetic model and the Freundlich isotherm model. According to the thermodynamic parameters, the Sr²⁺ adsorption procedures are endothermic. Additionally, BiSb-0.1 demonstrated notable stability against γ-irradiation. Various characterization methods and DFT calculations have proved that the mechanism of Sr²⁺ adsorption is the exchange between Sr²⁺ and H⁺ in Sb−OH and the coordination between O atom and Sr²⁺.

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来源期刊

Environmental Research 环境科学-公共卫生、环境卫生与职业卫生

CiteScore

12.60

自引率

8.40%

发文量

2480

审稿时长

4.7 months

期刊介绍： The Environmental Research journal presents a broad range of interdisciplinary research, focused on addressing worldwide environmental concerns and featuring innovative findings. Our publication strives to explore relevant anthropogenic issues across various environmental sectors, showcasing practical applications in real-life settings.