In the presence of S2O82−:3 S2O8−2+→))))2SO4−•4 SO4−•+H2O→SO42−+HO•+H+5 S2O8−2+HO•→HSO4−+SO4−•+12O26 S2O8−2+H•→HSO4−+SO4−•7 S2O8−2+→pyrolysis2SO4−•