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材料导报  2025, Vol. 39 Issue (4): 23120006-6    https://doi.org/10.11896/cldb.23120006
  无机非金属及其复合材料 |
氯化锂溶液中钾离子的吸附去除研究
李志录1,2, 王敏1,2,*
1 中国科学院青海盐湖研究所,盐湖资源绿色高值利用重点实验室,西宁 810018
2 青海省盐湖资源化学重点实验室,西宁 810018
Study on Adsorption and Removal of Potassium Ions from Lithium Chloride Solution
LI Zhilu1,2, WANG Min1,2,*
1 Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810018, China
2 Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Xining 810018, China
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摘要 锂盐产品的纯度影响其经济价值和实际应用,因此将制备的吸附剂应用于高浓度氯化锂溶液中钾离子的吸附去除对锂盐产品的提纯具有较大的意义。采用水热法和喷雾干燥法分别制得具有钾吸附能力的沸石粉体吸附剂和微颗粒吸附剂,然后探究其在含有钾杂质的锂溶液中的静态吸附性能和动态吸附性能。同时为更好地探究吸附过程机制,采用吸附方程描述和分析动力学过程,并考察吸附脱附循环过程中吸附剂的溶损。结果表明,制备的沸石分子筛粉体和颗粒具有良好的吸附性能,颗粒吸附剂静态吸附饱和容量可达到32 mg/g,而动态吸附过程的吸附饱和容量为21 mg/g,并且在吸附过程中吸附剂对K+具有良好的选择性。进一步采用吸附方程拟合动力学模型时发现二级吸附模型具有更好的拟合相关性,拟合相关系数R2＞0.999,同时吸附剂具有较低的溶损量。
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李志录
王敏
关键词:  锂盐产品提纯  吸附分离  K+去除  动态吸附  沸石分子筛    
Abstract: The purity of lithium products affects its economic value and practical application, so it is of great significance to apply the prepared adsorbent to the adsorption and removal of potassium ions in lithium chloride high concentration. This work used hydrothermal method and spray drying method to prepare zeolite powder adsorbent and microparticle adsorbent with potassium adsorption ability, respectively, and then investigated their static adsorption and dynamic adsorption performance in lithium solution containing potassium impurities. Meanwhile, in order to better explore the adsorption process, the adsorption equations were used to describe and analyze the kinetic process, and the dissolution loss of the adsorbent during the adsorption and desorption cycle was investigated. The results showed that the prepared zeolite powders and particles contained good static adsorption performance. The static adsorption capacity of the particle adsorbent can reach 32 mg/g, and the adsorption saturation capacity according to the dynamic adsorption process was 21 mg/g and the adsorbent contributed good selectivity for K+ in the adsorption process. When the adsorption equation was used to fit the kinetic model, it was found that the second-order adsorption model had a better fitting correlation coefficient (R2＞0.999) and the adsorbent had a low dissolution loss.
Key words:  purification of lithium salt products    adsorption and separation    K+ removal    dynamic adsorption    zeolite molecular sieve
出版日期:  2025-02-25      发布日期:  2025-02-18
ZTFLH:  TQ131.1  
基金资助: 国家自然科学基金(U20A20138)
通讯作者:  *王敏,中国科学院青海盐湖研究所研究员、学术委员会主任、博士研究生导师。目前主要从事盐湖钾、锂、硼、镁资源综合开发利用及产业化研究。wangmin@isl.ac.cn   
作者简介:  李志录,中国科学院青海盐湖研究所工程师,在王敏研究员的指导下进行研究。目前主要研究领域为盐湖资源高效分离。
引用本文:    
李志录, 王敏. 氯化锂溶液中钾离子的吸附去除研究[J]. 材料导报, 2025, 39(4): 23120006-6.
LI Zhilu, WANG Min. Study on Adsorption and Removal of Potassium Ions from Lithium Chloride Solution. Materials Reports, 2025, 39(4): 23120006-6.
链接本文:  
https://www.mater-rep.com/CN/10.11896/cldb.23120006  或          https://www.mater-rep.com/CN/Y2025/V39/I4/23120006
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