Effect Mechanisms of Humic Acid on Adsorption of Cadmium in Montmorillonite

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Effect Mechanisms of Humic Acid on Adsorption of Cadmium in Montmorillonite

更新时间：2024-11-07

- Effect Mechanisms of Humic Acid on Adsorption of Cadmium in Montmorillonite
- Issue 4, Pages: 177-180(2007)
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- Published：2007
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Effect Mechanisms of Humic Acid on Adsorption of Cadmium in Montmorillonite[J]. 2007, (4): 177-180.
DOI：

Effect Mechanisms of Humic Acid on Adsorption of Cadmium in Montmorillonite[J]. 2007, (4): 177-180. DOI：

摘要

实验研究了腐殖酸存在下重金属元素镉(Cd2 )在蒙脱石表面的吸附过程

对比研究了两种不同腐殖酸对吸附机理的影响。结果表明

重金属离子在蒙脱石表面的吸附作用受介质pH的影响。加入腐殖酸后吸附产生滞后现象

蒙脱石先吸附腐殖酸

之后转变为腐殖酸和蒙脱石共同吸附Cd2 作用

吸附量较单独吸附过程更大。吸附机理与腐殖酸的投加量和投加方式有关。

Abstract

The adsorption mechanisms of cadmium on montmorillonite were investigated and the effects of different kinds of humic acid on adsorption mechanisms were revealed.It was found that adsorption amount of Cd2 increased as pH value of ambient solution increased.After humic acid added

the adsorption of Cd was logged because humic acid adsorptions took precedence of Cd2 .Then co-adsorptions of Cd2 were carried through between humic acid and montmorillonite. So the quantity of adsorption was greater than adsorption without humic acid.In addition

the adsorption mechanisms were related to the dose and its added manner of humic acid.

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