Pedosphere 3(4): 299--308, 1993
ISSN 1002-0160/CN 32-1315/P
©1993 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Adsorption and Desorption of Exogenous Rare Earth Elements in Soils:Ⅰ. Rate and Forms of Rare Earth Elements Sorbed |
| ZHU JIAN-GUO, XING GUANG-XI, S. YAMASAKI, A. TSUMURA |
| LMCP, Institute of Soil Science, Academia Sinica, P. O. Box 821. Nanfng 210008 |
| ABSTRACT |
| Adsorption and desorption of exogenous rare earth elements (REE) in soils were studied. Results showed that soils had strong adsorbability for REE and the rate of adsorption of REE was over 95% of the added REE in these tests. The characteristics of adsorption isotherms corresponded well with the both Freundlich and Temkin equations, but deviated from the Langmuir equation. The adsorption of REE tended to increase with the rising of soil pH. A sequential extraction method used for studing the desorption and distribution of REE sorbed in soils are also discussed. |
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| Citation: Zhu, J. G., Xing, G. X., Yamasaki, S. and Tsumura, A. 1993. Adsorption and Desorption of Exogenous Rare Earth Elements in Soils:Ⅰ. Rate and Forms of Rare Earth Elements Sorbed. Pedosphere. 3(4): 299-308. |
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