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.
出处
《化学研究与应用》
CAS
CSCD
北大核心
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)
关键词
HD-2树脂
吸附
机理
镝
HD - 2 resin
adsorption behavior
adsorption mechamism
Dysprosium
