Decomposition Kinetics of Trichloroethylene by Fenton's Reaction that Uses Iron Powder

Abstract

In this study, we used iron powder and hydrogen peroxide, and investigated the kinetics of decomposition of TCE by the Fenton's reaction. As a result, the decomposition of TCE with iron powder was found to occur after some introduction period, which is not observed for that with ferrous iron. Excepting the period, the decomposition rate was found to be analyzes as the first order reaction. The obtained first reaction constants are found to be proportional to the iron powder concentration, but the reaction order to hydrogen peroxide changed with the range of its concentration. At its relatively high concentration of hydrogen peroxide, the reaction order for the concentration of hydrogen peroxide became negative.