改性粉煤灰吸附甲苯的实验研究

Experimental Research on Adsorption of Toluene by Modified Fly Ash

粉煤灰是电厂的典型废弃物,且具有一定的吸附能力,可作为一种较为经济的吸附剂供人们使用。为提高和改善其吸附性能,采用酸改性方法和微波联合酸碱改性方法制备了两种改性粉煤灰,对比原粉煤灰,探究了两种改性粉煤灰对于甲苯的吸附性能,并通过SEM和BET对粉煤灰改性前后进行表征。结果表明:酸改性粉煤灰吸附甲苯达到吸附饱和时间为380 min,最大甲苯吸附量为39 mg/g,微波联合酸碱改性粉煤灰性能最好,反应达到吸附饱和时间为470 min左右,对甲苯的最大吸附量达到48 mg/g。

Fly ash is a typical waste in power plants, and has a certain adsorption capacity, which can be used as a relatively economical adsorbent for people to use.In order to improve its adsorption performance, two kinds of modified fly ash were prepared by acid modification method and microwave combined acid modification method.The adsorption properties of ash for toluene were characterized by SEM and BET before and after modification of fly ash.The results show that the acid-modified fly ash adsorbs toluene and the adsorption saturation time is 380 min, and the maximum toluene adsorption capacity is 39 mg/g.The maximum adsorption capacity of toluene can reach to 48 mg/g.