摘要
本研究旨在评估纳滤膜技术在稀土浸出液膜法提浓过程中的应用潜力。从稀土离子截留与抗污染性能方面,对商业膜进行了筛选,发现提高硫酸钙饱和溶解度是提高浓缩倍率的关键。进一步深入研究了硫酸钙溶解度与纳滤膜过程的关系,并对纳滤膜的分离工艺进行了优化。通过调节溶液的pH,有效控制了硫酸钙在膜表面的沉积现象,进而提高了膜处理的效率以及稀土离子的浓缩倍率。此外,应用Hermia模型分析了不同运行条件下膜污染的影响,为膜清洗和延长使用寿命提供了理论依据。本研究为稀土浸出液的提浓提供了一种高效且环保的解决方案,具有显著的应用前景。
This paper evaluates the potential of nanofiltration membrane technology for concentrating rare earth elements.Commercial nanofiltration membranes were screened in terms of rare earth ion retention and anti-fouling performance,and it was found that improving the saturated solubility of calcium sulfate is the key to improving the concentration rate.Further investigations were conducted to explore the relationship between CaSO_(4) solubility and solution conditions,leading to the optimization of the nanofiltration process.Adjusting the solution pH effectively controlled CaSO_(4) scaling on the membrane surface,improving membrane performance and increasing rare earth ion concentration.Additionally,the impact of membrane fouling under various operating conditions was analyzed using the Hermia model,providing a theoretical foundation for membrane cleaning and extending service life.This study offers an efficient and environmentally friendly solution for concentrating rare earth leach solutions,with significant application potential.
作者
张荟钦
赵泓竣
付正军
庄力
董凯
贾添智
曹雪丽
孙世鹏
ZHANG Huiqin;ZHAO Hongjun;FU Zhengjun;ZHUANG Li;DONG Kai;JIA Tianzhi;CAO Xueli;SUN Shipeng(NJTECH University Suzhou Future Membrane Technology Innovation Center,Suzhou 215519,Jiangsu,China;State Key Laboratory of Materials-Oriented Chemical Engineering,College of Chemical Engineering,Nanjing Tech University,Nanjing 211816,Jiangsu,China;Weihua Membrane(Kunshan)Technology Company,Kunshan 215337,Jiangsu,China;Jiangsu Jiuwu High-Tech Company,Nanjing 211806,Jiangsu,China;Jianghai Environmental Protection Company,Changzhou 213017,Jiangsu,China)
出处
《化工学报》
北大核心
2025年第8期4095-4107,共13页
CIESC Journal
基金
国家重点研发计划项目(2023YFE0100900)
国家自然科学基金面上项目(22478181)
江苏省创新能力建设计划——江苏省技术创新中心课题项目(BM2021804)
西南林业大学西南山地森林资源保育与利用教育部重点实验室开放课题项目(LXXK-2023M12)。
关键词
纳滤
浓缩
膜污染
稀土元素分离
溶解性
nanofiltration
concentration
membrane fouling
rare earth element separation
solubility
作者简介
第一作者:张荟钦(1984-),男,博士,zhanghuiqin@jsfmtic.com;通信作者:曹雪丽(1987-),女,博士,副教授,cxl@njtech.edu.cn;通信作者:贾添智(1994-),男,博士,jiatianzhi@jsfmtic.com。
