Catalytic degradation of organic substances by activated hydrogen peroxide

Abstract EN

This research work compares between catalytic activity of metal iron (II), iron (III) and cobalt (II) to decompose hydrogen peroxide which promoting the oxidative degradation of organic compounds, and to evaluate the catalyst function and study of the effect of the pH on the reaction constants (k).

The research plan is to create models of waste water by adding a known amount of organic substances and then removing these substances by catalytic oxidation, studying the effect of change catalyst type, pH and calculating the reaction rate of the reactions in each.The selected organic substances are crystal violet and toluidine blue (organic dyes), then calculating the change of their concentrations (change in absorption) with time in different catalysts and pHs.

The obtained results showed the optimum pH to activate hydrogen peroxide varies between 8 and 9.

It is also found that cobalt (II) catalyst is more active than iron (II), iron (III) which generates hydroxyl radical from hydrogen peroxide promoting the oxidative degradation.

It confirmed by HPLC that cobalt (II) (at pH 8) catalyzed hydrogen peroxide and completely degrade crystal violet.