To enhance the removal efficiency of metallic mercury(Hg0)

how the Hg0 is oxidized into Hg2+by Fenton reagent and the factors influencing this oxidization process was investigated.For the Fenton reagents with different proportions of Fe3+

Cu2+and Fe2+

the effects of such factors as pH value

SO2 concentration and reaction time on the Hg0 removal efficiency were analyzed.The experimental results indicate that

only when the additive(H2O2)was mixed with the catalyst(Fe-type compounds)in the solution

the solution was able to oxidize Hg0 effectively

using the H2O2 alone or the catalyst alone can not reach a high mercury removal rate.The iron-based Fenton-type additives gave much more promising results compared to the Cu-based Fenton-like additives for Hg0 oxidation

the Fe2+solution was found to perform better than the Fe3+ solution in the overall conversion processes.The pH value of the solution was found to have a significant effect on the oxidation of Hg0 and the optimum solution pH value was 3.0.There was little indication that the presence of SO2 contributed to Hg0 oxidation.The removal efficiency of Hg0 increased with the flue gas' s residence time in the Fenton reagent.