In this study, the degradation of crystal violet (CV) was investigated by diferent oxidation processes; ozone (OZ), peroxone (PO), electrolysis (E), electrolysis/H2O2 (ECP), electroperoxone (EPO), and electrolysis/peroxene/H2O2 (EPOP). Main parameters including contact time, pH, CV concentration, and efect of scavengers were studied. The results showed that all processes were capable of CV decolorization. Among these processes, peroxone and electrolysis/peroxene/H2O2 with efciency about>90% were more efective than other ones. A signifcant decrease in oxidation rate of CV was observed by adding scavengers. This fact was due to higher afnity to react with free radicals. To confrm degradation of CV, FTIR spectra and nitrate ion level were taken. Also, to recognize toxicity the treated wastewater was tested against coliform bac- teria. Growths of Escherichia coli in EMB medium were observed. As a result, it confrms that the treated efuent can be discharged to environment.
