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钒和磷在土壤中的竞争吸附与迁移特性研究

Keywords: ,,竞争,吸附与迁移,土壤

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Abstract:

应用批培养法和土柱法分别研究了钒和磷在两种美国耕地土壤(Sharkey重粘土和Cecil壤沙土)中的竞争吸附与迁移特征。结果表明,Sharkey重粘土对V表现出非常强的吸持能力,快速的吸持反应表现出了近似于平衡吸附的特征。加P对Sharkey土壤吸持V的能力没有明显的影响。Cecil壤沙土对V的吸附表现为快速的平衡吸附,不过其吸持能力要明显地小于Sharkey重粘土,而且,在前期被Cecil吸持的V会随培养时间的延长而部分被解吸出来。Sharkey对P的吸持能力略小于对V的吸持能力,且动态吸附特性比较明显。Cecil对P的吸附能力非常弱,V在Cecil沙壤土中的竞争吸附能力大于P。Cecil壤沙土对P和V,尤其是对V的吸持具有动态吸附的特征。

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