DH-2树脂对镝的吸附及机理  

Studies on the adsorption behavior and mechanism of HD-2 resin for Dysrosium

作　　者：施林妹[1] 莫建军[2] 潘西瑜[1] 熊春华 

机构地区：[1]丽水职业技术学院,浙江丽水323000 [2]丽水学院化学系,浙江丽水323000 [3]浙江工商大学食品生物与环境工程学院,浙江杭州310000

出　　处：《化学研究与应用》2006年第9期1057-1060,共4页Chemical Research and Application

基　　金：浙江资助项目(20040551);浙江省教育厅资助项目(20031146)

摘　　要：研究了镝离子在HD-2树脂上的吸附行为。在HAc-NaAc体系pH=6．20时吸附最佳，测得静态饱和吸附容量为356mg／g（树脂），用0．1-2．0mol／L HCl可定量洗脱，表观速率常数k198=1．16×10^5s^-1，表观活化能Ea=16．1kJ／mol。等温吸附服从Freunilich经验式，吸附热力学参数AH=16．5kJ／mol，AS=58．2J／（mol·K），ΔG298=-0．859kJ／mol。用化学和红外光谱等方法讨论了吸附机理。The adsorption behavior and mechanism of HD - 2 resin for Dy^3＋ is investigated. HD - 2 resin has a good adsorptivity for Dy^3＋ in the HAc-NaAc medium at pH =6. 20. The statically saturated adsorption capacity is 356mg/g·（resin）. Dy^3＋ adsorbed on HD - 2 resin can be eluted quantitatively by using 0. 1-2. 0mol/L hydrochloric acid as an eluant. The apparent rate constant and activation energy are k298 = 1.16×10^5 sec^1 and Ea = 16. 1kJ/mol. The sorption behavior of HD -2 resin for Dy^3＋ obeys the Freundlich isotherm. The sorpfion thermodynamic parmeters of HD -2 resin for Dy^3＋are enthalpy change AH = 16. 5kj/mo] ,free energy change ΔG = - 0.859k J/mol, entropy change AS = 58. 2J/（ mol·K） , respectively. The adsorption mechanism of HD - 2 resin for Dy^3＋ was confirmed by chemical analysis and IR spectrometry.

关 键 词：HD-2树脂 吸附 机理 镝 

分 类 号：O647.314[理学—物理化学]