包覆低共熔溶剂的聚苯乙烯微胶囊吸附Li+的性能研究
Study on Li+adsorption performance of polystyrene microcapsules containing deep eutectic solvents
侯晓静 1王彦旭 1吴可君 1何潮洪1
作者信息
- 1. 浙江大学 化学工程与生物工程学院 浙江省化工高效制造技术重点实验室,浙江 杭州 310058;浙江大学衢州研究院,浙江 衢州 324000
- 折叠
摘要
为实现绿色、低成本从海水中提锂的目标,采用同轴共流微流体技术结合溶剂挥发法制备包覆有低共熔溶剂(甲基三辛基氯化铵/癸酸)的聚苯乙烯微胶囊.所制备的微胶囊颗粒呈均一的球形.将该微胶囊用作萃取Li+吸附剂,系统研究了吸附时间、吸附温度、溶液pH、初始锂浓度和固液比对Li+吸附量和萃取率的影响.结果表明在吸附Li+水溶液时,微胶囊对Li+的最大吸附量为 32 mg·g-1.碱性条件时微胶囊对模拟海水中的Li+吸附分配比为 10.22 L·g-1.
Abstract
To achieve environment friendly and low-cost lithium extraction from seawater,a co-axial microfluidic technology combined with a solvent evaporation method was employed to prepare polystyrene microcapsules coating a deep eutectic solvent(methyl trioctyl ammonium chloride/decanoic acid).The resulting microcapsules exhibits uniform spherical morphology.These microcapsules were employed as Li+adsorbents,and a systematic investigation was conducted to study the effects of adsorption time,temperature,solution pH,initial Li+concentration,and solid-liquid ratio on Li+adsorption capacity and extraction efficiency.The results demonstrate a maximum Li+adsorption capacity of 32 mg·g-1 when adsorbing Li+from aqueous solutions.Furthermore,the distribution ratio of Li+from simulated seawater by microcapsules is 10.22 L·g-1 under alkaline conditions.
关键词
微胶囊/提锂/低共熔溶剂/溶剂挥发法/吸附Key words
microcapsule/extracting lithium/deep eutectic solvent/solvent evaporation method/adsorption引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据