Removal of 2,4,6-Trichlorophenol by Iron and Manganese Oxides / Granular Activated Carbon with H2O2
Iron and manganese oxides/granular activated carbon composite (GACFM) was prepared via a chemical coprecipitation route, followed by a heat treatment at elevated temperature. The as–prepared GACFM was characterized by X-ray diffraction (XRD) and infrared spectroscopy (FTIR). The main iron and manganese oxides actually present in the composites were mainly composed of Fe3O4 ,Mn3O4 and (FeO)x(MnO)1-x. The adsorption and catalytic properties of GACFM and some conditions effects such as H2O2, pH , temperature and CO32- were studied for the removal of 2,4,6-trichlorophenol (TCP) from aqueous medium. The adsorption of TCP on GACFM obeyed the Freundlich isotherms. When the initial concentration of H2O2 was 0.4mg/L , 5mg/L TCP removal rate was maximum on the GACFM. The treatment of TCP could be carried out at initial pH under 7.0. CO32- can scavenge •OH in solution and decreased TCP removal. In the whole, GACFM was satisfactory absorbent and catalyst for the removal of chlorophenol from water.
Zhengyi Jiang, Xianghua Liu and Jinglong Bu
Z. Z. Liu et al., "Removal of 2,4,6-Trichlorophenol by Iron and Manganese Oxides / Granular Activated Carbon with H2O2", Advanced Materials Research, Vols. 154-155, pp. 28-33, 2011