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研究了BK110树脂在HAc-NaAc缓冲体系中对铒离子的吸附及解吸的行为,在pH=5.60时吸附最佳。静态饱和吸附容量为256mg.g-1(树脂),用0.3mol.L-1～2.0mol.L-1HCl可定量洗脱;测得吸附速率常数k298=4.28×10-5sec-1,表观活化能Ea=26.0kJ.mol-1;吸附服从Freundlich经验式;热力学参数ΔH=12.2kJ.mol-1。用化学和红外光谱等方法探讨了吸附机理。
The adsorption and desorption behavior of BK110 on erbium ions in HAc-NaAc buffer system was investigated. The best adsorption was obtained at pH = 5.60. The static saturated adsorption capacity was 256mg.g-1 (resin), with 0.3mol.L-1 ~ 2.0mol.L-1HCl quantitative elution; measured adsorption rate constant k298 = 4.28 × 10-5sec-1, the apparent Activation energy Ea = 26.0kJ.mol-1; adsorption obeys Freundlich empirical formula; thermodynamic parameter ΔH = 12.2kJ · mol-1. The adsorption mechanism was discussed by chemical and infrared spectroscopy.