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| Effects of Cu2+ adsorption on release of Aluminum in variable charge soil and constant charge soil |
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| Abstract: |
| Effects of pH on the amounts of change-available aluminum under different copper ion concentrations in two variable charge soils and two constant charge soils were studied. The results showed that the amount of changeavailable aluminum occurred by Cu2+ exchange increased with the increase of Cu2+ concentration. The order of changeavailable aluminum desorption was Ferralsol>Acrisol>Yellow-brown soil>Brown soil. When the pH value was over 3.6 (constant charge soils) or over 4.0(variable charge soils), the content of charge-available aluminum was almost neglected. It can be deduced that not the adsorption of Cu2+ but the pH is the main reason which occurred the change of changeavailable aluminum. |
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