The adsorption behavior and mechanism of amino methylene phosphonic acid resin (APAR) for praseodymium(Ⅲ) is investigated.The apparent rate constant is k 298 =2.89×10 -5 sec -1 .The adsorption behavior of APAR f...The adsorption behavior and mechanism of amino methylene phosphonic acid resin (APAR) for praseodymium(Ⅲ) is investigated.The apparent rate constant is k 298 =2.89×10 -5 sec -1 .The adsorption behavior of APAR for Pr(Ⅲ) abides the Freundlich isotherm.The adsorption thermodynamic parameters such as enthalpy change ΔH°,free energy change ΔG° and entropy change ΔS° of adsorption (APAR) for Pr(Ⅲ) are 6.38kJ·mol -1 ,-5.27kJ·mol -1 ,39.1J·mol -1 ·K -1 ,respectively.Activation energy Ea=8.39kJ·mol -1 .The coordination molar ratio of the functional group of APAR to Pr(Ⅲ) was confirmed by chemical analysis and IR spectrometry.展开更多
文摘The adsorption behavior and mechanism of amino methylene phosphonic acid resin (APAR) for praseodymium(Ⅲ) is investigated.The apparent rate constant is k 298 =2.89×10 -5 sec -1 .The adsorption behavior of APAR for Pr(Ⅲ) abides the Freundlich isotherm.The adsorption thermodynamic parameters such as enthalpy change ΔH°,free energy change ΔG° and entropy change ΔS° of adsorption (APAR) for Pr(Ⅲ) are 6.38kJ·mol -1 ,-5.27kJ·mol -1 ,39.1J·mol -1 ·K -1 ,respectively.Activation energy Ea=8.39kJ·mol -1 .The coordination molar ratio of the functional group of APAR to Pr(Ⅲ) was confirmed by chemical analysis and IR spectrometry.
