【摘要】 :研究了铈 ( )在氨基磷酸树脂上的吸附行为。试验结果在 p H5 .0时 ,静态饱和吸附容量为 197m g/g干树脂 ;用 2 mol· L- 1 HCl洗脱 ,洗脱率为 98.1% ;表观速率常数 k2 98=2 .71× 10 - 5 s- 1 ;等温吸附服从 Freundlich经验式 ;吸附反应中的△ Ho =5 0 .0 k J· mol- 1 ,△ So =2 86 J· mol- 1· K- 1 ,△ Go =- 35 .1k J· mol- 1。树脂功能基与Ce3+ 的配比为 2∶ 1;并用红外光谱探讨了树脂与铈的成键。更多还原

【Abstract】 The sorption behavior of amino methylene phosphonic acid resin (APAR)for cerium(Ⅲ)is investigated.Experimental results show that the statically saturated sorption capacity is 197mg/g·resin;Ce(Ⅲ)adsorbed on APAR can be eluted with 2mol·L -1 HCl,elution percentage is 98 1%;The apparent rate constant is k 298 =2 71×10 -5 s -1 ;The sorption behavior of APAR for Ce(Ⅲ) obeys the Freundlich isotherm.The sorption themodynamicparameters such as enthalpy change △H o,free energy change △G o and entropy change △S o of sorption (APAR)for Ce(Ⅲ)are 50 0kJ·mol -1 ,-35 1kJ·mol -1 ,286J·mol -1 ·K -1 ,respectively.The coordination molar ratio of the functional group of APAR to Ce(Ⅲ) is 2∶1.The sorption mechanism of APAR for Ce(Ⅲ) is examined by IR spectrometry.更多还原