“…Many studies have been conducted on nitrate reduction by millimetric (Buresh, 1976), (Westerhoff and James, 2003), Su andPuls (2004, 2007), (Rodriguez-Maroto et al, 2009), micrometric (Schaefer et al, 2007), (Huang et al, 1998), and nanoscale iron (Schaefer et al, 2007), (Liou et al, 2005), (Choe et al, 2000), (Chen et al, 2004), (Yang and Lee, 2005), (Li et al, 2006), (Sohn et al, 2006), (Shin and Cha, 2008), (Liou et al, 2006). Most of the above mentioned works investigated the reactions' kinetic, whereas little attention has been devoted to the system in thermodynamic equilibrium.…”