摘要
考查介质pH、温度、吸附时间、树脂量等因素对吸附过程的影响。实验结果表明:氨基膦酸树脂(APAR)对镥(Ⅲ)的吸附在pH=5.64的HAc-NaAc的缓冲溶液中为最佳。25℃时静态饱和吸附量为330.5 mg/g(树脂)。用0.5 mol/L的HC l溶液作为解析剂,解析率为95.4%;氨基膦酸树脂对镥(Ⅲ)的表观吸附活化能Ea=37.3 kJ/mol,表观吸附速率常数k298=2.47×10-5-s1,测得热力学参数分别为ΔH=7.86 kJ/mol,ΔG=-4.42 kJ/mol,ΔS=42.5 Jmo-l1K-1,等温吸附服从Freundlich经验式。树脂功能基与镥(Ⅲ)的配位比约为2∶1。
This paper deals with the adsorption behavior of a novel chelate resin, amino methylene phosphonic acid resin （APAR） for Lu（ Ⅲ ） and the influences of medium pH, adsorption temperature, adsorption time, etc. APAR resin has a good adsorption ability for Lu（ Ⅲ ） in the HAe-NaAe medium at pH = 5.64. The static adsorption capacity of APAR for Lu（ Ⅲ ） at 25 ℃ is 330. 5 mg · g^-1. The elution rate of Lu（ Ⅲ ） adsorbed on APAR is 95.4% with 0. 5 mol · L^-1 HCl. The apparent adsorption rate constant is k298 = 2.47 × 10^-5 s^-1. The apparent activation energy of APAR resin for Lu（ Ⅲ ） is 37.3 kJ · mol^-1. The adsorption behavior of APAR for Lu（ Ⅲ ） obeys the Freundlich isotherm. The thermodynamic adsorption parameters are △H = 7.86 kJ · mol^-1, △G = -4. 42 kJ · mol^-1, and △S = 42. 5 J · mol^-1 · K^-1 , respectively. The coordinate ratio of the functional radical to Lu （ Ⅲ ） is approximately 2 ： 1.
出处
《矿物学报》
CAS
CSCD
北大核心
2008年第4期488-492,共5页
Acta Mineralogica Sinica
基金
浙江省自然科学基金项目(No.201027)
浙江省教育厅科研资助项目(No.20040551)
关键词
氨基膦酸树脂
吸附行为
吸附机理
镥(Ⅲ)
amino methylene phosphonic acid resin
adsorption behavior
adsorption mechanism
lutetium（ Ⅲ）
