Pedosphere 3(2): 173--180, 1993
ISSN 1002-0160/CN 32-1315/P
©1993 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Cu Secondary Adsorption by Some Variable Charge Soils After Adsorbing SO42- |
| DONG YUAN-VAN, WANG SHU-YU |
| Department of Basic Sciences, Huazhong Agricultural University. Wuhan 430070 |
| ABSTRACT |
| Cu secondary adsorption by three variable charge soils collected from Hubei Province and Hunan Province was investigated. The amount of Cu secondary adsorption increased with that of SO42- elementary adsorption and conformed with the Langmuir, Freundlich and Temkin isotherms. Desorption of secondary-adsorbed Cu indicated that the hysteresis ratio decreased as Cu secondary adsorption increased, which meant that secondry-adsorbed Cu existed not only in the exchangeable form but also in the bridge form and specifically adsorbed form. The amount of Cu secondary adsorption increased with the temperature. |
| Key Words: |
| Citation: Dong, Y. V. and Wang, S. Y. 1993. Cu Secondary Adsorption by Some Variable Charge Soils After Adsorbing SO42-. Pedosphere. 3(2): 173-180. |
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