Zerovalent iron

Metallic iron Venn diagram showing the overlap between ZVIs and PRBs Zerovalent iron (ZVI) describes forms of iron metal that are proposed for use in the environmental remediation of contaminated soil and groundwater. Model AModel BClick either image to enlarge ZVI operates by electron transfer from Fe0 toward some organochlorine compounds, a common class of pollutants. The remediation process is proposed to generate Fe2+ and Cl− and halide-free organic products, all of which are relatively innocuous. Nanoscale ZVIs (nZVIs) are commonly used in remediation of chlorinated compounds and other pollutants. Type of ZVI click to enlarge Bulk Fe. Cast iron, consisting of scrap iron of construction grade, has been used as a reactive material for permeable reactive barriers (PRB) for groundwater remediation. Reactions are generally believed to occur on the Fe (oxide) surface; however, graphite inclusions can also serve as reaction sites. Nanoscale Fe. In addition to using macroscale iron in PRBs, nanoparticles (1-100 nm diameter) of zerovalent iron (nZVI) are effective. Zn. Zinc has shown much higher reactivity toward pentachlorophenol than iron. This indicates that zinc may be used as a