水处理用多孔悬浮陶粒表面磁/炭改性的应用研究

Study on magnetic/active carbon composite coating modification for porous suspension ceramsite

在多孔陶粒表面覆盖磁性Fe3O4/活性炭复合涂层进行改性,以增强其吸附性能,对各种工艺参数如浸渍比、炭化温度、活化温度、活化时间、磁性粉体添加量进行了研究,结果表明,活性炭原料中KOH/葡萄糖浸渍比为4、炭化温度400℃、活化温度850℃,活化时间1h、磁性粉体添加量为10%为最佳,改性后陶粒的亚甲基蓝吸附去除率(88.1%)是改性前的3.15倍,效果显著。

To enhance the adsorption performance of porous suspension ceramsite（psc）,this paper describes experiments in which Fe3O4 and activated carbon composite were coated onto the surface of porous suspension ceramsite,and this composite media was used for sorption experiment with methylene blue solution,conducted a study on the various process parameters,such as the impregnation ratio,carbonization temperature,the activation temperature,activation time,the magnetic powder added amount,the results show that： the optimum conditions for modification of porous suspension ceramsite are at a KOH/glucose ratio of 4.0,a carbonization temperature of 400℃,an activation temperature of 850℃ and a hold time of 2h,a magnetic powder dosage by 10%.The adsorption removal efficiency of methylene blue solution（1mg/L） by modified ceramsite reached 88.1%,wich was 3.15 times as unmodified ceramsite.The modification was very effective.