Peroxymonosulfate: An Alternative to Hydrogen Peroxide for the Control of Hydrogen Sulfide

The oxidation of total dissolved sulfide, where S (-II)= H_2S + HS + S_2^-, by peroxymonosulfate, HSO_5-, has been studied in wastewater. Peroxymonosulfate was found a more rapid and efficient oxidant of S (-II) than either H_2O_2 or Fe(II). The combination of per oxymonosulfate 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. Peroxy monosulfate has been shown to be a viable alternative to H_2O_2 for the control of sulfide-induced corrosion in concrete sewers.