Enhanced Photocatalytic Degradation of Humic Acid in Fe2O3 Aqueous Suspension by increasing Ca2+ strength Under a Blue Light Irradiation
This study aimed at improving the photocatalytic oxidation of humic acids (HA) in α-Fe2O3 suspensions by adding calcium cationic ion (Ca2+). A visible light photocatalyst of α-Fe2O3 was prepared by co-precipitation method and characterized by X-ray diffraction (XRD) and scanning electron microscope（SEM）. First a set of tests was conducted in the dark to study the adsorption of HA onto α-Fe2O3 in suspensions at different calcium concentrations. Then the photocatalytic degradation of HA under blue light irradiation was investigated in the presence of calcium ion. A set of comparison of photolysis, adsorption, photocatalysis was also studied. The results showed that the adsorption behavior between HA and α-Fe2O3 played a very important role during the photocatalytic oxidation process. The photocatalytic oxidation could be enhanced at neutral pH by increasing the cation strength. The present findings may be valuable for the treatment of HA in natural water under solar light irradiation.
Guangyue Ding Caixia Li Caimei Fan Yanping Sun
College of Chemistry and Chemical Engineering Taiyuan University of Technology Taiyuan, China
国际会议
成都
英文
1-4
2010-06-18（万方平台首次上网日期，不代表论文的发表时间）