Mechanical attrition as a method to produce zero valent iron is reviewed. The suggested mechanisms for formation of microstructures are discussed for ball milling of single component powders, mechanical alloying of multicomponent powders. The characteristic parameters of the products were de terminated by XRD and SEM methods. Hexavalent Cr(VI) is a known carcinogen, which forms relatively soluble precipitates, resulting in the persistence of relatively high concentrations of dissolved Cr(VI) in aquifers affected by Cr(VI) contamination. In this study, zero valent iron has been demonstrated effective for treatment of cation Cr(VI) in water.