Fig. 4: Identification of active species.

Effects of various concentrations of (a) methanol, (b) tert-butanol, (c) 1,4-benzoquinone, and (d) NaN3 on the efficiency of chloramphenicol oxidation. Electron paramagnetic resonance spectra of (e) 1O2 and \({{{\rm{O}}}_{2}}^{\cdot -}\) and (f) \(\cdot {\rm{OH}}\) and \({{{\rm{SO}}}_{4}}^{\cdot -}\). DMPO: 5,5-dimethyl-1-pyrroline-N-oxide; TEMP: 2,2,6,6-tetramethyl-4-piperidinyloxyl.