BRIEF RESEARCH REPORT article
Front. Environ. Sci.
Sec. Toxicology, Pollution and the Environment
This article is part of the Research TopicNovel Materials for Hazardous Waste DisposalView all articles
One-Step Hydrothermal Synthesis of Bismuth Sulfide Aerogel for Efficient iodine Capture
Provisionally accepted
Renren WangHao XiaoYi TanLuo ChenYuhang ZhouRunfeng XieChuan TanYifei YangCheng LiuHengyang WangJunxiao YangTao Duan
Lin Zhu*- Southwest University of Science and Technology, Mianyang, China
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The efficient capture of radioactive iodine is critical for nuclear safety due to its high mobility and toxicity. Bismuth sulfide (Bi2S3) aerogel, synthesized via a one-step hydrothermal method, demonstrate exceptional iodine adsorption performance. Characterization by SEM and BET confirmed the material's porous structure, which facilitated iodine uptake. Batch experiments revealed a high adsorption capacity of 1204 mg/g, with kinetics and isotherms well-described by the pseudo-second-order model and Freundlich isotherm, respectively, indicating that the adsorption process is dominated by chemisorption. The adsorption mechanism involves iodine phase transfer and subsequent formation of stable BiI3 phases, ensuring long-term immobilization. The Bi2S3 aerogel demonstrates superior chemical and thermal stability, high capture efficiency and cost-effectiveness, further highlight its practical potential for nuclear waste management. This work advances the design of bismuth-based adsorbents by combining high capacity, stability, and scalable synthesis, offering a sustainable solution for radioactive iodine capture.
Keywords: bismuth sulfide aerogel, Biotemplated, Iodine, Adsorption, Immobilization
Received: 21 Sep 2025; Accepted: 11 Nov 2025.
Copyright: © 2025 Wang, Xiao, Tan, Chen, Zhou, Xie, Tan, Yang, Liu, Wang, Yang, Duan and Zhu. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Lin Zhu, zhulin@swust.edu.cn
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