载铁颗粒活性炭的制备及其表征

The preparation and characterization of iron-containing granular activated carbon

本文以废活性炭为原料,氧化铁为添加剂,通过高温煅烧的方法制备载铁颗粒活性炭(IOCGAC)。结果表明,IOCGAC制备的最佳工艺参数为:煅烧终温为900℃,升温速率为6℃·min-1,m(氧化铁)/m(废活性炭)为4∶6,恒温时间为0.5 h,所得产品的比表面积达630.5 m2·g-1,收率为50.9%。对其进行SEM,IR,XRD表征分析,结果表明活性炭的表面负载了一层致密的铁氧化物,且主要以α-Fe、Fe3O4或γ-Fe2O3的形态存在,饱和磁化强度高达66.247 emu·g-1。

Iron-containing granular activated carbon （IOCGAC） was prepared with waste activated carbon and iron oxide by high temperature calcination process. The optimam parameters of the prep- aration process include a terminal sintering temperature of 900 ℃, an increasing heating rate of 6 ℃ · min -1 （ starting from ambient temperature）, a m/m ratio of 4：6 （ the ratio of the mass of ferric oxide to the mass of exhausted activated carbon）, maintained at a thermostatic time of 0.5 h. The maximum specific surface area of the IOCGAC was 630.5 m2· g-1 with a yield of 50.9%. The IOCGAC was characterized by SEM, IR and XRD. The results show that a dense layer of iron oxideis deposited on the surface of the activated carbon, which mainly exists by alpha Fe, Fe3 O4 or gamma Fe2P3, with a saturated magnetization strength of as high as 66. 247 emu · g-1.