应用化学 ›› 2025, Vol. 42 ›› Issue (1): 95-106.DOI: 10.19894/j.issn.1000-0518.240262

• 研究论文 • 上一篇    下一篇

(2-乙基己基胺基)甲基膦酸单-2-乙基己基酯浸渍树脂对钪的选择性吸附及应用

杨剑峰1,2, 李艳玲1(), 韩经露1,2, 李松松1,2, 廖伍平1,2,3()   

  1. 1.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
    2.中国科学技术大学应用化学与工程学院,合肥 230026
    3.中国科学院赣江创新研究院,赣州 341000
  • 收稿日期:2024-08-13 接受日期:2024-12-19 出版日期:2025-01-01 发布日期:2025-01-24
  • 通讯作者: 李艳玲,廖伍平
  • 基金资助:
    国家自然科学基金(92262301)

Selective Adsorption of Scandium by (2-Ethylhexylamino) Methyl Phosphonic Acid Mono-2-Ethylhexyl Ester Impregnated Resin and Its Application

Jian-Feng YANG1,2, Yan-Ling LI1(), Jing-Lu HAN1,2, Song-Song LI1,2, Wu-Ping LIAO1,2,3()   

  1. 1.State Key Laboratory of Rare Earth Resource Utilization,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China
    2.School of Applied Chemistry and Engineering,University of Science and Technology of China,Hefei 230026,China
    3.Ganjiang Innovation Academy,Chinese Academy of Sciences,Ganzhou 341000,China
  • Received:2024-08-13 Accepted:2024-12-19 Published:2025-01-01 Online:2025-01-24
  • Contact: Yan-Ling LI,Wu-Ping LIAO
  • About author:wpliao@ciac.ac.cn
    liyanling@ciac.ac.cn
  • Supported by:
    the National Natural Science Foundation of China(92262301)

摘要:

将(2-乙基己基胺基)甲基膦酸单-2-乙基己基酯(HEHAMP,H2L2)浸渍到大孔树脂Pre-XAD-16上制得了浸渍树脂(SIRs-HEHAMP),研究了在硫酸介质中SIRs-HEHAMP对钪的吸附性能,考察了反应时间、溶液酸度、硫酸氢根离子浓度、树脂用量以及温度等因素对钪吸附的影响,发现SIRs-HEHAMP浸渍树脂对Sc3+的吸附量随着反应时间的增加而逐渐增大; 在高酸度范围下,SIRs-HEHAMP浸渍树脂对Sc3+的吸附率随着酸度的增大而略有降低,而在pH值范围内对Sc3+的吸附率几乎没有影响; 在吸附过程中硫酸氢根没有参与配位; 温度对Sc3+的吸附几乎没有影响; SIRs-HEHAMP吸附Sc3+的过程符合准二级动力学模型; 测定了浸渍树脂对钪的饱和负载量(以Sc2O3计)为36.29 mg/g,并对SIRs-HEHAMP浸渍树脂、HEHAMP萃取剂以及支撑基质Pre-XAD-16进行了红外光谱与TG-DSC表征,结果表明,HEHAMP成功浸渍到支撑基质Pre-XAD-16上。 将SIRs-HEHAMP浸渍树脂用于从模拟赤泥浸出液中吸附和分离钪。 Sc3+的吸附率为51.71%,TiO2+吸附率为42.50%,几乎不吸附Al3+,Fe3+和稀土离子吸附率均在20%以下,Sc/Ti分离系数为1.45; 加入质量分数为6%的H2O2时,SIRs-HEHAMP浸渍树脂对Sc3+吸附率提升到63.17%,TiO2+和Fe3+的吸附率下降,其余金属离子基本不吸附,Sc/Ti分离系数提高至6.94,表明该浸渍树脂可以应用于从赤泥浸出液中分离回收钪。

关键词: (2-乙基己基胺基)甲基膦酸单-2-乙基己基酯, 钪, 浸渍树脂, 吸附, 分离

Abstract:

The (2-ethylhexylamino) methyl phosphonic acid mono-2-ethylhexyl ester (HEHAMP) impregnated resin was prepared by loading α-amino acid phosphine extractant, known as HEHAMP, onto macroporous resin Pre-XAD-16. The study investigates the adsorption properties of scandium in a sulfuric acid medium, examining the impacts of reaction time, acidity, concentration of hydrogen sulfate ions, resin dosage and temperature. It was found that the adsorption capacity of scandium increased gradually with the increase of reaction time. Under high acidity conditions, the adsorption rate of Sc3+ by SIRs-HEHAMP impregnated resin slightly decreased with increasing acidity, while within the pH range there was almost no effect on the adsorption rate of Sc3+. During the adsorption process, HSO4- did not participate in coordination. Temperature had almost no effect on the adsorption of Sc3+. The adsorption process of Sc3+ by SIRs-HEHAMP followed a pseudo-second-order kinetic model. The saturated adsorption capacity of the resin for scandium (expressed as Sc2O3) was 36.29 mg/g. Infrared spectroscopy and TG-DSC characterization were conducted on SIRs-HEHAMP impregnated resin, HEHAMP extractant, and the macroporous resin Pre-XAD-16. The results indicated that HEHAMP was successfully impregnated onto the supporting matrix Pre-XAD-16. The application of HEHAMP impregnated resin to the adsorption and recovery of Sc(Ⅲ) from a simulated sulfuric acid leaching solution of red mud was also explored. The adsorption rate of Sc(Ⅲ) was determined to be 51.71%, while that of Ti(Ⅳ) was 42.50% and Al(Ⅲ) showed negligible adsorption,the adsorption rates for Fe(Ⅲ) and rare earth ions were below 20%, and the separation factor between Sc(Ⅲ) and Ti(Ⅳ) (SF(Se/Ti)) was 1.45. By introducing 6% (mass percent) hydrogen peroxide, the adsorption rate of Sc(Ⅲ) improved to 63.17%, the adsorption rates of Ti(Ⅳ) and Fe(Ⅲ) weredecreased, while other metal ions showed negligible adsorption. The separation factors between Sc(Ⅲ) and Ti(Ⅳ) (SF(Se/Ti)) reached 6.94, indicating an enhancement in selectivity for scandium over titanium in the adsorption process.

Key words: (2-Ethylhexylamino) methyl phosphonic acid mono-2-ethylhexyl ester, Scandium, Impregnated resin, Adsorption, Separation

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