Year: 2025
Type: article
Abstract: The efficient capture of radioactive iodine is critical for nuclear safety due to its high mobility and toxicity. Bismuth sulfide (Bi 2 S 3 ) aerogel, synthesized via a one-step hydrothermal method, demonstrates exceptional iodine adsorption performance. Characterization by scanning electron microscopy (SEM) and BET confirmed the material’s porous structure, which facilitated iodine uptake. Batch experiments revealed a high adsorption capacity of 1,204 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 BiI 3 phases, ensuring long-term immobilization. The Bi 2 S 3 aerogel demonstrates superior chemical and thermal stability, high capture efficiency, and cost-effectiveness, further highlighting its practical potential for nuclear waste management. This work advances the design of bismuth-based adsorbents by combining high capacity, stability, and scalable synthesis, thereby offering a sustainable solution for radioactive iodine capture.
Authors: Renren Wang, Hao Xiao, Yi Tan, Luo Chen, Yuhang Zhou, Runfeng Xie, Chuan Tan, Yifei Yang, Cheng Liu, Hengyang Wang, Junxiao Yang, Tao Duan, Lin Zhu
Institution: Southwest University of Science and Technology
Language: English
Subfield: Inorganic Chemistry
Field: Chemistry
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $3,801
Awards: G3201912205, G3790058602, G416854609
OpenAlex ID: W4416936238