使用Dowex 50WX8树脂通过批量和连续模式的离子交换从水溶液中分离的研究
Amin Ildarabadi1, Maryam Khajenoori2, Fazel Zahakifar3
1Faculty of Chemical, Petroleum and Gas Engineering, Semnan University, Semnan, Iran.
Scientific reports
|July 22, 2025
概括
这项研究成功地将从酸性稀土元素 (REE) 溶液中分离出来,使用了Dowex 50W-X8离子交换树脂. 优化的批量和连续系统证明了高效的Ce (III) 吸收和回收.
科学领域:
- * 化学工程 化学工程
- * 材料科学 材料科学
- * 环境化学 环境化学
背景情况:
- * 稀土元素 (REE) 处理中的酸性溶液对 REE 分离构成挑战.
- *低pH环境需要有效的方法来隔离特定的REEs,如.
研究的目的:
- * 调查离子交换方法,以从酸性溶液中分离.
- *为了优化Ce (III) 分离的条件,使用Dowex 50W-X8树脂进行批量和连续系统.
- * 评估Ce (III) 交换过程的热力学和动力学参数.
主要方法:
- *使用Dowex 50W-X8树脂进行批量和连续的离子交换实验.
- *优化树脂剂量,温度和硫酸度.
- *动力和同热模型 (伪二次,兰木尔) 和热力学分析.
- * 在模拟真实介质中进行树脂再生研究和测试,使用Th (IV) 和Fe (II).
主要成果:
- *最佳批量条件:0.16g树脂,35°C,0.2M H2SO4,达到10.34mgg-1的容量.
- * 伪二次动力学和朗格穆尔异热模型最好地描述了批处理过程.
- *连续系统在26个小时内与托马斯运动模型相适应;用3M H2SO4.4实现了98.81%的脱吸.
- *成功的Ce (III) 分离在含有Th (IV) 和Fe (II) 的模拟溶液中得到证明.
结论:
- * Dowex 50W-X8树脂有效地将Ce (III) 从酸性REE溶液分离出来.
- * 离子交换过程在热力学上是有利的 (内热,自发).
- *优化的批量和连续系统,以及高效的再生,显示了工业应用的潜力.
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