不同改性方法对粉煤灰比表面积和粒径分布的影响

Preparation of Modified Fly Ash and Its Adsorption Properties for Heavy Metals

粉煤灰表面疏松多孔,比表面积较大,具有一定的吸附性能。但粉煤灰部分的孔道是封闭的,直接用于废水处理的效果并不理想。本研究选取HCl、H2SO4、炭化的方式对粉煤灰进行改性。通过改性打通粉煤灰封闭的孔道,提升其比表面积和物理化学性能,为粉煤灰的资源化利用提供理论支持。

The surface of fly ash is porous and porous,and its specific surface area is large.However,the pore of fly ash is closed,and the result is not satisfactory.In this study,HCl,H2SO4 and carbonization modification methods were used to modify fly ash.By modifying and opening the closed pore of fly ash,the specific surface area and physical and chemical properties of fly ash can be improved,which provides theoretical support for the resource utilization of fly ash.