Enhanced adsorption behavior of Nd（Ⅲ） onto Dll3-Ⅲ resin from aqueous solution

An enhanced adsorption and desorption procedure of Nd（Ⅲ） onto D113-Ⅲ resin were prepared with various chemical methods. Batch studies were carried out with various pH, contact time, temperature and initial concentrations, and then column studies were conducted. The results showed that the optimal ad...

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Bibliographic Details
Published in中国稀土学报：英文版 Vol. 29; no. 10; pp. 979 - 985
Main Author 熊春华 陈昕怡 姚彩萍
Format Journal Article
LanguageEnglish
Published 2011
Subjects
动力学模型
吸附条件
树脂
水溶液
热力学参数
红外光谱技术
行为
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Summary:An enhanced adsorption and desorption procedure of Nd（Ⅲ） onto D113-Ⅲ resin were prepared with various chemical methods. Batch studies were carried out with various pH, contact time, temperature and initial concentrations, and then column studies were conducted. The results showed that the optimal adsorption condition was at pH value of 6.90. The process was fast initially and arrived equilibrium within 60 h. The resin exhibited a high Nd（Ⅲ） uptake as 232.56 mg/g at 298 K. The adsorption data fitted well with pseudo-second-order kinetic model. Thermodynamic parameters were studied, which indicated that the adsorption process was spontaneous and endothermic. Thomas model was delineated here to predict the breakthrough curves based on the experimental column study data. In the elution test, 1 mol/L HCl solution could achieve a satisfactory elution rate, which indicated that D113-1/1 resin could be regenerated and reused. Finally, the IR spectroscopic technique was undertaken, and a novel adsorption mechanism was proposed.
Bibliography:11-2788/TF
XIONG Chunhua , CHEN Xinyi , YAO Caiping（Department of Applied Chemistry, Zhejiang Gongshang University, Hangzhou 310012, China）
Nd（Ⅲ）; D113-Ⅲ resin; enhanced adsorption; novel mechanism; rare earths
An enhanced adsorption and desorption procedure of Nd（Ⅲ） onto D113-Ⅲ resin were prepared with various chemical methods. Batch studies were carried out with various pH, contact time, temperature and initial concentrations, and then column studies were conducted. The results showed that the optimal adsorption condition was at pH value of 6.90. The process was fast initially and arrived equilibrium within 60 h. The resin exhibited a high Nd（Ⅲ） uptake as 232.56 mg/g at 298 K. The adsorption data fitted well with pseudo-second-order kinetic model. Thermodynamic parameters were studied, which indicated that the adsorption process was spontaneous and endothermic. Thomas model was delineated here to predict the breakthrough curves based on the experimental column study data. In the elution test, 1 mol/L HCl solution could achieve a satisfactory elution rate, which indicated that D113-1/1 resin could be regenerated and reused. Finally, the IR spectroscopic technique was undertaken, and a novel adsorption mechanism was proposed.
ISSN:1002-0721
2509-4963