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生态学报 2001
Effect of calcium carbonate on adsorption and desorption of cadmium in soils
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Abstract:
A batch experiment was conducted to study the effect of calcium carbonate on the adsorption and desorption of Cd in three kinds of soils.The solution of different Cd concentrations prepared with CdCl 2 was equilibrated with soil samples by shaking for 12 hours and 1mol/L KNO 3 was used to extract the exchangeable Cd.The effect of calcium carbonate was investigated by removal of calcium carbonate (by 0.5mol/L pH5.0 NaAc HAc) in castanozem soil and by adding of calcium carbonate (1.0%) to leached cinnamon soil,brown earth and castanozem soil,respectively.The results showed that (1) the total amounts of Cd adsorption and specific Cd adsorption were increased in the following order:leached cinnamon soil
