首页|D001型阳离子交换树脂吸附锂的性能研究

D001型阳离子交换树脂吸附锂的性能研究

Research on the Performance of Lithium Adsorption of D001 Type Cation Exchange Resin

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目的 为了满足锂电池发展对锂需求量的快速增长需求,需要从盐湖卤水中开发一种低成本高效益且环保的方法.方法 以D001为吸附剂,通过扫描电子显微镜(SEM)、N2吸附脱附曲线对其结构进行表征,采用静态吸附试验研究了 D001投加量、溶液pH、吸附时间和溶液初始浓度等因素对D001吸附锂的性能影响.结果 在pH为2~8时,D001对锂具有较高的吸附容量,在pH为8时,D001对锂的吸附容量最大,达到11.9mg/g,其吸附实验数据更符合准二级动力学模型和Freundlich等温吸附模型.在循环5次后,D001对锂的吸附容量可以稳定在11.0mg/g以上,但溶液中Mg2+的存在对D001吸附锂有一定的负面影响.根据X射线光电子能谱(XPS)结果,分析了 D001吸附锂的吸附机制,主要受到N和O影响,发生络合反应.结论 D001对锂具有一定的吸附能力,且循环性能稳定.
Objective In order to cope with the rapidly growing demand for lithium in the development of lithium batteries,it is necessary to develop a cost-effective and environment friendly method from the brine of salt lakes.Methods The resinD001 was used as the adsorbent,and its structure was characterized by scanning electron mi-croscopy(SEM)and N2 adsorption and desorption curves.The static adsorption tests were used to study the effects of factors such as the resinD001 dosage,solution pH,adsorption time,and initial concentration of solution on the performance of lithium adsorption of D001.Results D001 had a high capacityof lithium adsorption at pH 2~8,the maximum reaching 11.9mg/g at pH 8.The adsorption experimental data were more consistent with the quasi-secondary kinetic model and the Freundlich isothermal adsorption model.The adsorption capacity of D001 could be stabilized above 11.0mg/g after 5 cycles,but the presence of Mg2+in the solution had a certain negative effect on the lithium adsorption of D001.Conclusion D001 has a certain capacityof lithium adsorption and stable cycling performance.

resinD001lithiumadsorption propertiesadsorption mechanism

刘少敏、黄笑笑

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安徽理工大学地球与环境学院,安徽 淮南 232001

D001树脂 吸附性能 吸附机制

2024

安徽理工大学学报(自然科学版)
安徽理工大学

安徽理工大学学报(自然科学版)

影响因子:0.331
ISSN:1672-1098
年,卷(期):2024.44(5)