λ-MnO2 was prepared by column method from normal spinel LiMn2 O4 with purity of 99.38%.The influence of LiMn2 O4 grain size and acidity of leaching solution on the lithium leaching process was studied.The results show that the appropriate range of LiMn2O4 grain size was 60- 160 meshes and the concentration of leaching solution HCl was 0.1 mol·L-1.The adsorption capacity Q of λ-MnO2 for lithium increased with the increase of pH and changed markedly at pH 6.0- 10.0. It was 3.80mmol/ g at pH 12.0. The distribution coefficients Kd of Li + and Na + were 3. 406 × 104 and 2. 300 respectively, and the separation coefftcient aLiNa was 1.481×104 at pH 6.5. As a result, λ-MnO2 is a high performance ion-sieve material for lithium ion.
参考文献
| [1] | K Ooi;Y Miyai;S Katoh et al.Topotactic Li + Insertion to λ-MnO2 in the Aqueous Phase[J].Langmuir,1989,5:150-157. |
| [2] | Y Onodera;T Iwasakl;H Hayashi et al.Preparation Method and Lithium Adsorption Property of λ-MnO2-Silica Composite[J].Journal of Chemistry Letters,1990,23:1801. |
| [3] | Sagara;W B Ning;I Yoshida .Preparation and Adsorption Properties of λ-MnO2-Cellulose Hybrid-Type Ion-Exchanger of Lithium Ion from Seawater[J].Separation Science and Technology,1989,24(14):1227. |
| [4] | J C Hunter .Preparation of a New Crystal form of Manganese Dioxide: λ-MnO2[J].Journal of Solid State Chemistry,1981,39:142. |
| [5] | Kenta Ooi;yoshitaka Miyai;Shunsaku Katoh;Hiroshi Maeda Mitsuo Abe.The pH Titration Study of Lithium Ion Adsorption on λ-MnO2[J].Journal of Bull Chem Soc,1988:407. |
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