Sorption Behavior and Mechanism of D113 Resin for Erbium
来源期刊：Journal of Rare Earths2007年第S1期
论文作者：姚彩萍
文章页码：169 - 174
摘 要：The sorption behavior and mechanism of a novel macroporous weak acid resin（D113 resin） for Er（Ⅲ） were investigated. The optimal sorption condition of D113 resin for Er（Ⅲ） was pH 6.42 in HAc-NaAc medium. The statically saturated sorption capacity was 272 mg·g-1 at 298 K in HAc-NaAc medium. The Er（Ⅲ） adsorbed on D113 resin could be reductively eluted by the mixed solution of HCl and NaCl. The elution percentage could reach 100%. The resin could be regenerated and reused without apparent decrease of sorption capacity. The apparent sorption rate constant was k298=1.98×10-5 s-1. The apparent activation energy was 8.60 kJ·mol-1. The sorption behavior of D113 resin for Er（Ⅲ） obeyed the Freundlich isotherm and Langmuir isotherm. The sorption parameters of thermodynamics were ΔH=44.0 kJ·mol-1, ΔS=223 J·mol-1·K-1, ΔG298 K=-22.3 kJ·mol-1, respectively. The molar coordination ratio of the functional group of D113 resin to Er（Ⅲ） was 3∶1. The sorption mechanism of D113 resin for Er（Ⅲ） was examined using chemical method and IR spectrometry.
姚彩萍
摘 要：The sorption behavior and mechanism of a novel macroporous weak acid resin（D113 resin） for Er（Ⅲ） were investigated. The optimal sorption condition of D113 resin for Er（Ⅲ） was pH 6.42 in HAc-NaAc medium. The statically saturated sorption capacity was 272 mg·g-1 at 298 K in HAc-NaAc medium. The Er（Ⅲ） adsorbed on D113 resin could be reductively eluted by the mixed solution of HCl and NaCl. The elution percentage could reach 100%. The resin could be regenerated and reused without apparent decrease of sorption capacity. The apparent sorption rate constant was k298=1.98×10-5 s-1. The apparent activation energy was 8.60 kJ·mol-1. The sorption behavior of D113 resin for Er（Ⅲ） obeyed the Freundlich isotherm and Langmuir isotherm. The sorption parameters of thermodynamics were ΔH=44.0 kJ·mol-1, ΔS=223 J·mol-1·K-1, ΔG298 K=-22.3 kJ·mol-1, respectively. The molar coordination ratio of the functional group of D113 resin to Er（Ⅲ） was 3∶1. The sorption mechanism of D113 resin for Er（Ⅲ） was examined using chemical method and IR spectrometry.
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