应用化学 ›› 2025, Vol. 42 ›› Issue (9): 1245-1256.DOI: 10.19894/j.issn.1000-0518.250086

• 研究论文 • 上一篇    下一篇

基于(2-乙基己基胺基)甲基膦酸单-2-乙基己基酯的离子印迹材料及其在微量钪去除方面的应用

李成1, 李艳玲2(), 李松松2, 罗小龙1(), 邓必成3,4, 廖伍平2,3,4   

  1. 1.长春工业大学化学与生命科学学院,长春 130022
    2.中国科学院长春应用化学研究所,稀土资源利用国家重点实验室,长春 130022
    3.中国科学院赣江创新研究院,材料与化学研究所,赣州 341000
    4.中国科学院江西稀土研究院,材料与化学研究所,赣州 341000
  • 收稿日期:2025-02-28 接受日期:2025-07-24 出版日期:2025-09-01 发布日期:2025-09-28
  • 通讯作者: 李艳玲,罗小龙
  • 基金资助:
    国家重点研发项目(2022YFC2905201)

Preparation of Ion-Imprinted Material Based on 2-Ethylhexylamino Methyl Phosphonic Acid Mono-2-Ethylhexyl Ester Extractant and Its Application for the Removal of Trace Scandium

Cheng LI1, Yan-Ling LI2(), Song-Song LI2, Xiao-Long LUO1(), Bi-Cheng DENG3,4, Wu-Ping LIAO2,3,4   

  1. 1.College of Chemistry and Life Sciences,Changchun University of Technology,Changchun 130022,China
    2.State Key Laboratory of Rare Earth Resources Utilization,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China
    3.Institute of Material and Chemistry,Ganjiang Innovation Academy,Chinese Academy of Sciences,Ganzhou 341000,China
    4.Institute of Rare Earths Material and Chemistry,Jiangxi Institute of Rare Earths,Chinese Academy of Sciences,Ganzhou 341000,China
  • Received:2025-02-28 Accepted:2025-07-24 Published:2025-09-01 Online:2025-09-28
  • Contact: Yan-Ling LI,Xiao-Long LUO
  • About author:luoxiaolong890419@163.com
    liyanling@ciac.ac.cn
  • Supported by:
    the National Key Research and Development Project(2022YFC2905201)

摘要:

以(2-乙基己基胺基)甲基膦酸单-2-乙基己基酯(HEHAMP)萃取Sc3+的饱和萃合物为模板制备了离子印迹材料P-IIM,并对其进行了傅里叶变换红外光谱(FT-IR)、热重分析(TGA)和扫描电子显微镜(SEM)等表征,发现当萃取剂质量分数大于50%时,材料难以成型。 进一步研究了P-IIM在盐酸介质中对Sc3+的吸附性能,考察了萃取剂质量、溶液初始pH值、吸附时间、初始Sc3+浓度和其他金属离子如铁和稀土等对Sc3+吸附的影响。 结果表明,P-IIM对Sc3+的吸附量随着萃取剂含量增加而逐渐增大,而随着溶液初始pH值升高先增大后减小,当pH值为2时吸附量最大; P-IIM吸附Sc3+的过程符合准二级动力学模型,并以单层吸附为主。 P-IIM可用于从稀土溶液中吸附去除微量钪(Ⅲ),其对Sc3+的吸附去除率超过98%。

关键词: (2-乙基己基胺基)甲基膦酸单-2-乙基己基酯, 离子印迹材料, 吸附, 钪, 选择性

Abstract:

Ion-imprinted material P-IIM was prepared using Sc3+-2-ethylhexylamino methyl phosphonic acid mono-2-ethylhexyl ester (HEHAMP) chelate as a template for the selective adsorption of scandium and characterized by Fourier transform infrared (FT-IR) spectrometer, thermal gravimetric analyzer (TGA), and scanning electron microscopy (SEM), etc. P-IIM can not be obtained when the percentage of HEHAMP extractant is more than 50%. The adsorption of Sc3+ ions in chloride solution by P-IIM was investigated and the effects of extractant mass, initial pH value, time, initial Sc3+ concentration and other coexisting metals were evaluated. The adsorption of Sc3+ by P-IIM increases gradually with the increasing content of HEHAMP extractant, while it first increases and then decreases as the initial pH of the solution increases. The adsorption capacity is the highest when the pH is 2. The adsorption of Sc3+ follows a quasi-two-stage kinetic model and is dominated by monolayer adsorption. P-IIM can be applied in the removal of trace scandium from rare earth solutions. The removal rate of scandium is more than 98%.

Key words: 2-Ethylhexylamino methyl phosphonic acid mono-2-ethylhexyl ester, Ion-imprinted material, Adsorption, Scandium, Selectivity

中图分类号: