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铬变酸-2R负载树脂分离富集微量金和钯

鲍长利, 徐昕, 宋海欧, 张建会, 李俊锋   

  1. 吉林大学 化学学院, 长春 130061
  • 收稿日期:2007-10-15 修回日期:1900-01-01 出版日期:2008-01-26 发布日期:2008-01-26
  • 通讯作者: 鲍长利

Separation and Reconcen of Trace Gold and Palladium with Chromotrope-2R Loaded Resin

BAO Changli, XU Xin, SONG Haiou, ZHANG Jianhui, LI Junfeng   

  1. College of Chemistry, Jilin University, Changchun 130061, China
  • Received:2007-10-15 Revised:1900-01-01 Online:2008-01-26 Published:2008-01-26
  • Contact: BAO Changli

摘要: 以铬变酸-2R(CT-2R)作为螯合剂, D296强碱性阴离子交换树脂作为载体制备具有螯合基团的负载树脂, 并用红外光谱对其CT-2R负载树脂结构进行鉴定, 给出了负载树脂的吸附性能及分离富集Au(Ⅲ)和Pd(Ⅱ)的最佳条件. 结果表明, 在pH=1.0的HCl介质中, Au和Pd的氯络阴离子被吸附在树脂上与大量贱金属元素分离. 用0.1 mol/L HCl40 g/L硫脲溶液以0.5 mL/min的流速进行洗脱, 树脂结构不被破坏, 可重复使用. 通过原子吸收光谱对标准样品的测定, 相对标准偏差(n=6)为5.72%和7.89%.

关键词: 铬变酸-2R, 负载树脂, 分离富集, 金,

Abstract: The loaded resin containing chelating group was prepared with chromotrope-2R as chelating agent,D296 strongly basic anion exchange resin as carrier and the structure of the CT-2R loaded resin was proved by means of infrared (IR) spectra. The adsorption properties of loaded resin and optimum conditions for the separation and preconcentration of Au (Ⅲ) and Pd (Ⅱ) were studied. The results show that chlorocomplex anion of Au and Pd in pH=1.0 HCl solution can be adsorbed on CT2R loaded resin and separated from many other base metals. Au and Pd on the resin were eluted with 0.1 mol/L HCl40 g/L thiourea solution at a flow rate of 0.5 mL/min. The resin is retreated and reused easily. The standard samples determined by atomic absorption spectrometry, the relative standard deviations (n=6) of Au and Pd are 5.72% and 7.89%, respectively.

Key words: chromotrope-2R, loaded resin, separation and precon centration, gold, palladium

中图分类号: 

  • O652.6