改性膨润土的制备及其对Cr^(6+)的吸附研究

Preparation of modified bentonite and its adsorption on Cr^(6+)

探讨了膨润土提纯土、有机改性土及锰化改性土在静态吸附条件下吸附Cr6+的最佳条件。同时进行了等温吸附研究,结果表明Freundlich吸附等温线模式能很好地描述改性膨润土对Cr6+的吸附。最后进行了改性膨润土吸附Cr6+的动力学研究,发现改性膨润土对Cr6+具有良好的吸附性能,动力学数据满足准二级动力学方程。

We discuss the best condition of the adsorption on Cr6＋ in the condition of static adsorption by purified,organic modified and manganese modified bentonite.And we do the isotherm adsorption research at the same time.The results show that Freundlich adsorption isotherm model could describe the adsorption of modified bentonite on Cr6＋ well.Finally,we do dynamics study on the adsorption of modified bentonite on Cr6＋,and find that the modified bentonite has good performance on absorbing Cr6＋,the dynamic data meet with the quasi-second order kinetic equation.