| D301树脂吸附铼(Ⅶ)的研究(英文) |
| Adsorption of Rhenium(Ⅶ) with D301 Resin |
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| 摘要: 本文研究了D301树脂对铼(Ⅶ)的吸附性能，结果表明在T=298 K，pH=2.7的HAc-NaAc缓冲溶液中静态饱和吸附容量为715 mg·g-1；0.5~5.0 mol·L-1 HCl溶液可以不同程度地解吸树脂上的铼，其中4.0 mol·L-1 HCl作为解吸剂时，一次解吸率可达100%。反应开始阶段的表观吸附速率常数k298 K=7.2×10-5 s-1；等温吸附服从Freundlich经验式；吸附反应的ΔH=-4.4 kJ·mol-1；吸附物中树脂功能基与Re(Ⅶ)的物质的量比约为1∶1。并用化学法和红外光谱探讨了吸附机理。 |
| 关键词: D301树脂 铼 吸附 |
| 基金项目: |
| Abstract: The adsorption properties of D301 resin (D301R) for Re(Ⅶ) were investigated. The statically saturated adsorption capacity is 715 mg·g-1 at 298 K in HAc-NaAc medium at pH 2.7. Re(Ⅶ) adsorbed on D301R can be eluted by 0.5~5.0 mol·L-1 HCl and the elution percentage is as high as 100% in 4.0 mol·L-1 HCl solution. The apparent adsorption rate constant of D301R for Re(Ⅶ) at the initial stage is k298 K=7.2×10-5 s-1. The adsorption behavior obeys the Freundlich empirical formula. The thermodynamic adsorption parameter, enthalpy change ΔH is -4.4 kJ·mol-1. The molar ratio of the functional group of D301R to Re(Ⅶ) is about 1∶1. The adsorption mechanism of D301R for Re(Ⅶ) was examined by using chemical method and IR spectrometry. |
| Keywords: D301 resin rhenium adsorption |
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| 摘要点击次数: 1834 |
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| 吴香梅,舒增年.D301树脂吸附铼(Ⅶ)的研究(英文)[J].无机化学学报,2009,25(7):1227-1232. |
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