Xu Yuan, Xu Weiwei, Yan Xiaoci, Li Guang, Qu Haonan, Periyasami Govindasami, Li Haibing, Cheng Jing
State Key Laboratory of Green Pesticide, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China.
Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia.
Langmuir. 2024 Oct 22;40(42):22346-22354. doi: 10.1021/acs.langmuir.4c03059. Epub 2024 Oct 8.
Efficient adsorption and separation of rare earth from other similar rare earth wastewater has become an urgent demand for resource utilization of ion-type rare earth minerals in China. Herein, thulium (Tm) ion-imprinted graphene oxide (GO)-doped polyether sulfone (PES) membranes (GO-TII/PES-2 membranes) were prepared, in which ion-imprinted graphene oxide was applied as an efficient Tm ionic ligand in the imprinted layer and polyether sulfone was applied as a carrier in the membrane matrix to achieve the selective adsorption and separation of Tm and neighboring rare earth ions. Combined with an ion rectifier, the separation and purification performances of Tm were explored. The separation factors β, β(, β and β in the dynamic adsorption process increased significantly from 1.22, 1.04, 1.04, and 1.02 for nonimprinting to 3.07, 3.91, 3.91, and 3.33 for imprinted membranes. The GO-TII/PES-2 membrane adsorbed about three times more Tm than the nonionic-imprinted (GO-NII/PES) membrane by adding a color developer and quantifying Tm based on a fast and easy UV-photometric method. After eight dynamic permeations, the adsorption of Tm by the GO-TII/PES-2 membrane decreased by only 13%, indicating that the membrane has good reuse performance. Additionally, the investigation examined the influence of Tm on wheat seed germination, underscoring its potential application in agriculture and the importance of adsorbing and separating rare earth ions.
从其他类似稀土废水中高效吸附和分离稀土已成为我国离子型稀土矿资源利用的迫切需求。在此，制备了铥（Tm）离子印迹氧化石墨烯（GO）掺杂聚醚砜（PES）膜（GO-TII/PES-2膜），其中离子印迹氧化石墨烯在印迹层中作为高效的Tm离子配体，聚醚砜在膜基质中作为载体，以实现Tm与相邻稀土离子的选择性吸附和分离。结合离子整流器，探索了Tm的分离和纯化性能。动态吸附过程中的分离因子β、β(、β和β从非印迹的1.22、1.04、1.04和1.02显著增加到印迹膜的3.07、3.91、3.91和3.33。通过添加显色剂并基于快速简便的紫外光度法对Tm进行定量，GO-TII/PES-2膜对Tm的吸附量是非离子印迹（GO-NII/PES）膜的约三倍。经过八次动态渗透后，GO-TII/PES-2膜对Tm的吸附量仅下降了13%，表明该膜具有良好的重复使用性能。此外，该研究考察了Tm对小麦种子萌发的影响，强调了其在农业中的潜在应用以及吸附和分离稀土离子的重要性。
