shows a frst-order dependence of nitrate
denitrification on Fe0 dosage, presumably because the
reactive Fe0 site concentration increases proportionally
with the Fe0 concentration. In low stoichiometric excess
of Fe0 particles, the reaction rate linearly increased with
increasing amounts of iron to 200 mg/l nitrate solution
and in higher dosage (>50 g/l), its change became very
small. The dependence of nitrate removal rate on iron
content may be expressed by the equation of enzyme
reaction type as follows: