The methylene blue（MB）removal abilities of raw activated carbon and iron/cerium modified raw activated carbon（Fe–Ce-AC）by adsorption were researched and compared.The characteristics of Fe–Ce-AC were examined by ...The methylene blue（MB）removal abilities of raw activated carbon and iron/cerium modified raw activated carbon（Fe–Ce-AC）by adsorption were researched and compared.The characteristics of Fe–Ce-AC were examined by N2adsorption,zeta potential measurement,FTIR,Raman,XRD,XPS,SEM and EDS.After modification,the following phenomena occurred：The BET surface area,average pore diameter and total pore volume decreased;the degree of graphitization also decreased.Moreover,the presence of Fe3O4led to Fe–Ce-AC having magnetic properties,which makes it easy to separate from dye wastewater in an external magnetic field and subsequently recycle.In addition,the equilibrium isotherms and kinetics of MB adsorption on raw activated carbon and Fe–Ce-AC were systematically examined.The equilibrium adsorption data indicated that the adsorption behavior followed the Langmuir isotherm,and the pseudo-second-order model matched the kinetic data well.Compared with raw activated carbon,the maximum monolayer adsorption capacity of Fe–Ce-AC increased by27.31%.According to the experimental results,Fe–Ce-AC can be used as an effective adsorbent for the removal of MB from dye wastewater.展开更多
基金the Specialized Research Fund for the National Natural Science Foundation of China (Nos.21567013, 51504119)the National High Technology Research and Development Program (863) of China (No. 2015AA020201)+1 种基金the Yunnan Applied Basic Research Project (No.2015FB129)the Yunnan Provincial Science and Technology Innovation Talents Scheme Technological Leading Talent (No.2013HA002)
文摘The methylene blue（MB）removal abilities of raw activated carbon and iron/cerium modified raw activated carbon（Fe–Ce-AC）by adsorption were researched and compared.The characteristics of Fe–Ce-AC were examined by N2adsorption,zeta potential measurement,FTIR,Raman,XRD,XPS,SEM and EDS.After modification,the following phenomena occurred：The BET surface area,average pore diameter and total pore volume decreased;the degree of graphitization also decreased.Moreover,the presence of Fe3O4led to Fe–Ce-AC having magnetic properties,which makes it easy to separate from dye wastewater in an external magnetic field and subsequently recycle.In addition,the equilibrium isotherms and kinetics of MB adsorption on raw activated carbon and Fe–Ce-AC were systematically examined.The equilibrium adsorption data indicated that the adsorption behavior followed the Langmuir isotherm,and the pseudo-second-order model matched the kinetic data well.Compared with raw activated carbon,the maximum monolayer adsorption capacity of Fe–Ce-AC increased by27.31%.According to the experimental results,Fe–Ce-AC can be used as an effective adsorbent for the removal of MB from dye wastewater.
