PEROXYMONOSULFATE - AN ALTERNATIVE TO HYDROGEN-PEROXIDE FOR THE CONTROL OF HYDROGEN-SULFIDE

The oxidation of total dissolved sulfide, where S(-II) = H2S + HS- + S2-, by peroxymonosulfate, HSO5-, has been studied in wastewater. Peroxymonosulfate was found a more rapid and efficient oxidant of S(-II) than either H2O2 or Fe(II). The combination of peroxymonosulfate and hydrogen peroxide was additive in terms of S(-II) oxidation, while the combination of peroxymonosulfate and Fe(II) resulted in a decrease in the effectiveness of Fe(II) as an oxidant. Peroxymonosulfate has been shown to be a viable alternative to H2O2 for the control of sulfide-induced corrosion in concrete sewers.