摘要
研究了采用喷雾干燥法和离子液体法制备不同形貌(球状和核壳状)γ-AlOOH前驱体,再采用机械化学法制备Li-Al层状吸附剂(吸附剂A,球状γ-AlOOH;吸附剂B,核壳状γ-AlOOH),借助XRD、SEM、FT-IR和N2吸附—脱附技术对所制备吸附剂物相、结构、形貌等进行表征,考察了其对锂的吸附性能和机制。结果表明:吸附剂A和B的有效成分均为锂铝层状氢氧化物;不同形貌前驱体形成的吸附剂的层状结构不同;吸附剂A的比表面积大于吸附剂B;二者对锂的吸附过程均符合准二级动力学和Langmuir模型,最大吸附量分别为12.08 mg/g和9.89 mg/g,且吸附选择性较高。
Preparation of the γ-AlOOH precursors with different morphologies(spherical and nuclear shell) were prepared by spray drying method and ionic liquid method, and the preparation of Li-Al layered adsorbents(adsorbent A(spherical γ-AlOOH) and B(core-shell γ-AlOOH)) by mechanochemical method were studied.The phase, structure, morphology of the prepared adsorbent were characterized by XRD,SEM,FT-IR and N2adsorption—desorption techniques.The adsorption performance and mechanism of lithium were investigated.The results show that the active ingredients of adsorbents A and B are both lithium-aluminum layered hydroxides.The lamellar structures of the adsorbents formed by precursors with different morphologies is different, and the specific surface area of adsorbent A is larger than that of adsorbent B.The adsorption processes of both adsorbents for lithium are in accordance with the pseudo-second-order and Langmuir model, and the maximum adsorption capacities are 12.08 mg/g and 9.89 mg/g, respectively.The adsorption selectivity of the adsorbent for lithium is relatively higher.
作者
王丁
胡雨佳
李中林
吕凤程
吴成志
陈俊雪
李义兵
WANG Ding;HU Yujia;LI Zhonglin;LYU Fengcheng;WU Chengzhi;CHEN Junxue;LI Yibing(School of Materials Science and Engineering,Guilin University of Technology,Guilin 541000,China;Collaborative Innovation Center for Exploration of Nonferrous Metal Deposits and Efficient Utilization of Resources in Guangxi,Guilin University of Technology,Guilin 541000,China)
出处
《湿法冶金》
CAS
北大核心
2023年第1期37-44,共8页
Hydrometallurgy of China
基金
广西科技计划项目(重大专项)(桂科AA22067077)
广西科技计划项目(重大专项)(桂科AA22068077)
广西科技计划项目(重大专项)(桂科AA22068078)
广西科技计划项目(重大专项)(桂科AA17204100)。
关键词
γ-AlOOH
层状锂铝氢氧化物
锂
吸附
性能
γ-AlOOH
lithium-aluminum layered hydroxide
lithium
adsorption
performance
