Study on Adsorption Behavior of Rare Earth Complexes on Nanometer-Size Titanium Dioxide with ICP-AES
来源期刊：JOURNAL OF RARE EARTHS2003年第4期
论文作者：江祖成 胡斌 梁沛 秦永超
Key words：inorganic metallic materials; nanometer TiO2; Eu complexes; adsorption; speciation; rare earths;
Abstract: A new method of using nanometer TiO2 as solid-phase extractant coupled with ICP-AES was proposed for speciation of rare earth elements. The adsorption behavior of rare earth complexes on nanometer TiO2 was investigated. Effect of pH value, contact time, elution solution and interfering ions on the recovery of the rare earth complexes were studied. A quantitative recovery (>90%) was found in the pH range of 4～9.0 for Eu-citric, 4.5～9.0 for Eu-oxine and Eu-HIBA, and 6.5～9.0 for Eu3+. Eu-EDTA can not be adsorbed in the pH range studied. There is large difference in the adsorption behavior on nanometer TiO2 between rare earth element and its complexes. The possibility of application of nanometer TiO2 on the speciation of rare earth element was explored.
江祖成1，胡斌1，梁沛1，秦永超1
(1.Department of Chemistry, Wuhan University, Wuhan 430072, China)
Abstract:A new method of using nanometer TiO2 as solid-phase extractant coupled with ICP-AES was proposed for speciation of rare earth elements. The adsorption behavior of rare earth complexes on nanometer TiO2 was investigated. Effect of pH value, contact time, elution solution and interfering ions on the recovery of the rare earth complexes were studied. A quantitative recovery (>90%) was found in the pH range of 4～9.0 for Eu-citric, 4.5～9.0 for Eu-oxine and Eu-HIBA, and 6.5～9.0 for Eu3+. Eu-EDTA can not be adsorbed in the pH range studied. There is large difference in the adsorption behavior on nanometer TiO2 between rare earth element and its complexes. The possibility of application of nanometer TiO2 on the speciation of rare earth element was explored.
Key words:inorganic metallic materials; nanometer TiO2; Eu complexes; adsorption; speciation; rare earths;
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