摘要
研究了γ AlOOH自水溶液中对Eu(Ⅲ )离子及其配合物的吸附。结果表明 :①吸附等温线符合Langmuir极限公式 ;②Eu(Ⅲ )离子吸附的表观活化能为 43 .43kJ·moI- 1 ;③吸附百分率随溶液pH值增大而增大 ,S形曲线在pH =4.0～ 6.5出现突跃 ;④Eu(Ⅲ )离子及其配合物的形态和表面基团电荷分布随溶液pH值变化而变化 ,γ AlOOH对配合物的吸附也随之而变 ;配体能抑制水解 ,pH >7仍然存在吸附作用 ;氨基乙酸和碳基水杨酸配合物的吸附曲线与Eu(Ⅲ )离子接近 ,而多元羟基酸配合物的吸附曲线与Eu(Ⅲ )离子有较大差异。
Adsorption of Eu (Ⅲ) ion and its complexes from aqueous solution of γAlOOH were studied. Results showed that the adsorption isotherm accorded with the limited Lagmuir equation, and the adsorption obeyed the first order kinetic equation. The activation energy for adsorption process was 43.43?kJ/mol and the pH value of solution effected obviously on the adsorption of Eu (Ⅲ) ion, with the adsorption edge at pH 4.0～6.5. The adsorption technique can be used in alkali range on the basis of chelating agents such as EDTA, restrained the hydrolysis of Eu (Ⅲ), but the complexing agents such as amino acid, have little effects on the adsorption.
出处
《云南化工》
CAS
2003年第3期34-36,73,共4页
Yunnan Chemical Technology
基金
云南省科委应用基础研究基金 ( 98B0 14M )
