Degradation of crystal violet (CV) from aqueous solutions using ozone, peroxone, electroperoxone, and electrolysis processes: a comparison study

Mastaneh Abdi,Hooshyar Hossini,Seyed Omid Rastegar,Hazhir Karimi,Mona Balagabri

doi:10.1007/s13201-020-01252-w

Mastaneh Abdi, Hooshyar Hossini + Show 3 more

Open Access

https://doi.org/10.1007/s13201-020-01252-w

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Abstract

In this study, the degradation of crystal violet (CV) was investigated by different 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 effect of scavengers were studied. The results showed that all processes were capable of CV decolorization. Among these processes, peroxone and electrolysis/peroxene/H2O2 with efficiency about > 90% were more effective than other ones. A significant decrease in oxidation rate of CV was observed by adding scavengers. This fact was due to higher affinity to react with free radicals. To confirm degradation of CV, FTIR spectra and nitrate ion level were taken. Also, to recognize toxicity the treated wastewater was tested against coliform bacteria. Growths of Escherichia coli in EMB medium were observed. As a result, it confirms that the treated effluent can be discharged to environment.

Highlights

The triphenylmethane dyes have been extensively used for histological stain and especially Gram’s Method of classifying bacteria
The aim of this study is a comparative study to investigate the decolorization of Crystal Violet (CV) based on different advanced oxidation processes (AOPs) methods including ozone (OZ), peroxone (PO), electrolysis (E), electrolysis/H2O (EP), electroperoxone (EPO), and electrolysis/ peroxone/H2O2 (EPOP)
The effect of ozonation, electrolysis, electrolysis/H2O2, peroxone, electro-peroxene, and electro-peroxene/ H2O2 was examined for decolorization of CV from aqueous solutions

Summary

Introduction

The triphenylmethane dyes have been extensively used for histological stain and especially Gram’s Method of classifying bacteria. They are used as a versatile dye in much industrial application like textile processing industries (Parshetti et al 2011). Various techniques including physiochemical and biological processes such as oxidation, advanced oxidation, adsorption, coagulation, membrane filtration, electrochemical processes, and ultrasonic irradiation have been suggested for degradation of synthetic dyes (Chou et al 1999). Advanced oxidation processes (AOPs) have been considered as an effective and strong process for wastewater treatment because of the involved oxidative radicals (Comninellis et al 2008).

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