Fe–Mn binary oxide flower-like 3-dimensional nanostructure synthesized from hydrothermal procedure was used to remove arsenic (As) from aqueous solution. The samples were characterized with XRD, SEM and FTIR. SEM images revealed that the Fe–Mn binary oxide was dispersing flower-like sphere with the diameter of 500 − 800 nm and the width of petal was of 20 − 30 nm. Sorption of the As to Fe–Mn binary oxide reached equilibrium in less than 180 s, which was the much faster than that of pure MnO2 and amorphous iron manganese binary oxide. The adsorption isotherm was agreed well to the Freundlich adsorption model with adsorption capacities of 26.5 mg/g, when the equilibrium concentration of 34.5 mg/L. The effect of temperature revealed that the adsorption of As was an exothermic, and the adsorption was decreased with increasing temperature 20 − 70 °C. The removal percentage of As by Fe–Mn binary oxide reached 100% from aqueous solution at pH 4.0 − 6.0. The Fe–Mn binary oxide nano-flowers are a potential high efficient nanomaterial for removal of As from water.
- Fe–Mn binary oxide
- First received 22 July 2015.
- Accepted in revised form 26 October 2015.
- © IWA Publishing 2015