5结论 ( 1)土壤表面会同时带有正电荷 ( AEC)、永久 负电荷( CECp) 与可变负电荷( CECv) , 正、负电荷 间不具加和性, 因此土壤可同时吸附以络阴离子 形式存在的核素铀和以阳离子形式存在的锶铯。
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土壤可变负电荷量、阴离子吸附量和电荷零点随海拔升高而趋于增加。
The variable charge amount, the anion adsorption amount and the PZC values of the soils tend to increase with the increase in altitude.
在所研究的样本中，氧化铁和氧化铝是带可变正电荷的亚表面，而氧化硅是带可变负电荷的亚表面。
In the studied samples, iron and aluminium oxide were pH-dependent positive charge surface, silica was pH-dependent negative charge surface.
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