【摘要】 系统研究了镝离子在BK110树脂上的吸附行为,实验表明,在pH=5.70的HAc-NaAc介质中吸附最佳。测得静态饱和吸附容量为256mg.g-1(树脂);用0.5mol.L-1~2.0mol.L-1HCl可定量洗脱;表观速率常数k298=2.32×10-5s-1;表观活化能Ea=18.2kJ.mol-1;等温吸附服从Freundlich经验式;吸附热力学参数△H=13.8kJ.mol-1,△S=49.9J.mol-1.K-1,△G=-1.04kJ.mol-1;用化学和红外光谱等方法讨论了吸附机理。更多还原

【Abstract】 The sorption behavior of BK110 resin for Dy(Ⅲ) was investigated.BK110 resin has a good sorption ability for Dy(Ⅲ) in the HAc-NaAc medium at pH=5.70.The statically saturated sorption capacity is 256mg·g-1resin.Dy(Ⅲ) adsorbed on BK110 resin can be eluted quantitatively by using 0.5～2.0 mol· L-1 hydrochloric acid as an eluent.The apparent rate constant is k298=2.32×10-5 sec-1.The apparent activation energy of BK110 for Dy(Ⅲ) is 18.2 kJ·mol-1.The sorption behavior of BK110 for Dy(Ⅲ) obeys the Freundlich isotherm.The sorption parameters of thermodynamic are ΔH=13.8 kJ·mol-1,ΔS=49.9 J·mol-1·K-1,ΔG=-1.04 kJ·mol-1.The sorption mechanism of BK110 resin for Dy3+was confirmed by chemical analysis and IR spectra.更多还原