Activated Carbon supported Fe(0) nanoparticles (AC-Fe(0)) were applied to the reductive removal of nitrate to investigate the effects of AC support on the reactivity of Fe(0) nanoparticle. XRD, SEM and EDS, XPS analyses on AC-Fe(0) revealed that AC-Fe(0) is more susceptible to oxidation compared to the unsupported Fe(0) nanoparticles, and that the extent of oxidation of the AC-Fe(0) particles will vary depending on the ratios of AC to Fe(0). Nitrate reduction rate of AC-Fe(0) was much slower than that of unsupported Fe(0) nanoparticles. AC-Fe(0) (0.5 : 1) particles reduced the nitrate to ca. 40% of the initial concentration, and AC-Fe(0) (5 : 1) particles performed poorly with only 10% removal of the nitrate. Besides the deactivation of AC-Fe(0) due to corrosion of Fe(0), the mass transport limitation caused by the thick layering of Fe(0) on porous AC seemed to be another negative factor for the decreased reactivity of AC-Fe(0).
United States Environmental Protection Agency. National Primary Drinking Water Regulations: Contaminant Specific Fact Sheets, Inorganic Chemicals, Technical Version; 811-F-95-002a-T; USEPA Office of Water, Washington, DC, (1995). Korean Minister of Environment, Drinking Water Quality Management 5-3, 2011
The EU Water Framework Directive, European Commission Environment, 2000
Clesceri LS, Greenberg AE, Eaton AD, Standard methods for the examination of water and wastewater, 20th Ed., 4-108, American Public Health Association, Washington, DC, 1998
Ponder SM, Ford JR, Darab JG, Mallouk TE, Mater. Res.Soc. Sym. Proc., 556, 1269, 1999