Abstract: Lithium manganese oxide precursor was prepared by hydrothermal reaction of monoclinic type γ-MnOOH with LiOH solution. The ion-sieve material was obtained by acid treatment of the precursor through H+/Li+ ion exchange. The materials of γ-MnOOH, Li-MnO and H-MnO were characterized by XRD and SEM. The adsorption behavior of the ion-sieve material to lithium from salt lake brine was investigated. The ion-sieve material showed a 37 mg/g lithium uptake from salt lake brine with the high ratio of magnesium to lithium, proven to have a large uptake capacity and a high selectivity.

Key words: ion-sieve material, salt lake brine, lithium, adsorption

摘要： 以γ-MnOOH和LiOH溶液为原料，水热法合成离子筛前驱体锂锰氧化物，经酸洗抽提出锂离子，得到离子筛材料，对产物γ-MnOOH, Li-MnO和H-MnO进行了XRD和SEM表征. 研究了离子筛材料对盐湖卤水中锂的吸附性能. 实验结果表明，离子筛材料对高镁锂比盐湖卤水中Li+的最大吸附量为37 mg/g，具有吸附容量大、选择性高的优点.

关键词: 离子筛材料, 盐湖卤水, 锂, 吸附