中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 35 No. 3 March 2025 |
（1. Key Laboratory of Green Utilization of Critical Non-metallic Mineral Resources, Ministry of Education, Wuhan University of Technology, Wuhan 430070, China;
2. School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China;
3. Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan 430070, China;
4. State Environmental Protection Key Laboratory of Mineral Metallurgical Resources Utilization and Pollution Control, Wuhan University of Science and Technology, Wuhan 430081, China;
5. Zhejiang New Era Zhongneng Recycling Technology Co., Ltd., Shaoxing 312000, China;
6. Powerchina Eco-environmental Group Co., Ltd., Shenzhen 518102, China）
Abstract:The adsorption kinetics of polystyrene [1-butyl-3-methylimidazolium][bis(2,4,4-trimethylpentyl)phosphinate] (PS[C4mim][C272]) towards V(V) in acidic leachate was explored under ultrasound. The effects of ultrasonic power and V(V) concentration on the adsorption performance of PS[C4mim][C272] were investigated. The results showed that ultrasonic radiation significantly shortened the adsorption equilibrium time and improved the adsorption performance of PS[C4mim][C272] compared with the conventional oscillation. At an ultrasonic power of 200 W, the equilibrium adsorption capacity of PS[C4mim][C272] reached its maximum of 311.58 mg/g. The kinetic model fitting results showed that the adsorption process of PS[C4mim][C272] strictly followed the pseudo-second-order kinetic model under ultrasound. Analysis using the shrinking core model and the Weber-Morris model showed that the adsorption process of PS[C4mim][C272] was primarily controlled by intra-particle diffusion mechanism. The adsorption isotherm model study showed that the Langmuir isotherm model could effectively fit the adsorption process of PS[C4mim][C272] under ultrasound.
Key words: kinetics; ultrasound; vanadium; polystyrene [1-butyl-3-methylimidazolium][bis(2,4,4-trimethylpentyl)- phosphinate]; conventional oscillation; adsorption
