Electrodegradation of Acid Mixture Dye through the Employment of Cu/Fe Macro-Corrosion Galvanic Cell in Na2SO4 Synthetic Wastewater.

Mateusz Kuczyński,Mateusz Łuba,Paweł Wojtacha,Tomasz Mikołajczyk,Piotr Sołowiej,Bogusław Pierożyński,Agnieszka Jasiecka-Mikołajczyk,Lech Smoczyński

doi:10.3390/molecules26154580

Mateusz Kuczyński, Mateusz Łuba + Show 6 more

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https://doi.org/10.3390/molecules26154580

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Abstract

Traditional wastewater purification processes are based on a combination of physical, chemical, and biological methods; however, typical electrochemical techniques for removing pollutants require large amounts of electrical energy. In this study, we report on a process of wastewater purification, through continuous anodic dissolution of iron anode for aerated Cu/Fe galvanic cell in synthetic Na2SO4 wastewater solution. Electrochemical experiments were conducted by means of a laboratory size electrolyzer, where electrocoagulation along with electrooxidation phenomena were examined for wastewater containing Acid Mixture dye. The above was visualized through the employment of electrochemical (cyclic voltammetry and ac impedance spectroscopy techniques) along with instrumental spectroscopy analyses.

Highlights

Published: 29 July 2021Large amounts of different dyes that are present in industrial wastewaters are responsible for serious environmental and health problems [1,2]
Among various groups of textile dyes, particular attention should be paid to the so-called azo dyes
Various studies conducted in recent years have confirmed serious toxicity, as well as mutagenic and carcinogenic effects of some azo dyes, including their metabolites [6,7,8,9,10]

Summary

Introduction

Large amounts of different dyes that are present in industrial wastewaters are responsible for serious environmental and health problems [1,2]. Among various groups of textile dyes, particular attention should be paid to the so-called azo dyes. This specific group of coloring agents is characterized with the presence of one or more azo groups (-N=N-) [3,4,5]. Large concentrations of azo-type dyes in water have a direct impact on the conditions of all organisms living in a biosystem, which, most importantly, are transferred to human populations. The above, combined with severe environmental pollutions, have led scientists to consider the development of novel, more efficient treatment methods for the dye-based industrial wastewaters

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