| Enhanced adsorption behavior of Nd（Ⅲ） onto Dll3-Ⅲ resin from aqueous solution |
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| 作者姓名： | 熊春华 陈昕怡 姚彩萍 |
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| 作者单位： | Department of Applied Chemistry, Zhejiang Gongshang University, Hangzhou 310012, China |
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| 基金项目： | Project supported by the National Natural Science Foundation of China （20972138） and the Key Grant of Education Department of Zhejiang Province, China （Z200907459） |
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| 摘 要： | 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 equilibriumwithin 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/LHCl solution could achieve a satisfactory elution rate,which indicated that D113-III resin could be regenerated and reused.Finally,the IRspectroscopic technique was undertaken,and a novel adsorption mechanism was proposed.
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| 关 键 词： | Nd(III) D113-III resin enhanced adsorption novel mechanism rare earths |
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