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
Patricio A Riveros,et al.提出了一种从氨基膦酸树脂上洗脱Sb(Ⅴ)的有效方法,此法在工业上已用于控制铜电解液中锑的质量浓度。与Sb(Ⅲ)不同,用HCl和其他试剂洗脱,Sb(Ⅴ)特别难从氨基膦酸树脂上洗脱,因此,工业实践中,树脂颗粒上S...Patricio A Riveros,et al.提出了一种从氨基膦酸树脂上洗脱Sb(Ⅴ)的有效方法,此法在工业上已用于控制铜电解液中锑的质量浓度。与Sb(Ⅲ)不同,用HCl和其他试剂洗脱,Sb(Ⅴ)特别难从氨基膦酸树脂上洗脱,因此,工业实践中,树脂颗粒上Sb(Ⅴ)逐渐累积,降低了树脂的容量和寿命。试验发现,含0.5~1.0 g/L硫脲的5~7 mol/L HCl溶液是Sb(Ⅴ)的有效洗脱剂。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.