In this work, highly crystalline and high aspect ratio α-Fe2O3 nanowire (NWs) were successfully produced by thermal oxidation of iron in water vapor at 800°C. The process was done for 2 h and the NWs were found to be covering the foil uniformly unlike when the oxidation environment was dry whereby the NWs formed were shorted and rather dispersed. The formation of NWs was proposed to be due to a stress-driven surface diffusion during thermal oxidation process. When oxidation was done at 700 oC, we observed coral-like nanostructures. The α-Fe2O3 NWs were then used as adsorbent to remove Cr(VI) from stimulated wastewater. Removal efficiency of 97% in a 225 mg/L Cr(VI) solution was observed indicating very fast removal of Cr(VI) in the presence of the NWs. The kinetic characteristic of the adsorption was fitted to a pseudo-second-order kinetic model, and isothermal studies indicated that the α-Fe2O3 NWs exhibited an adsorption capacity of 66.26 mg/g.