Electrochemical Degradation of Industrial Dyes in Wastewater through the Dissolution of Aluminum Sacrificial Anode of Cu/Al Macro-Corrosion Galvanic Cell.

Mateusz Łuba,Bogusław Pierożyński,Tomasz Mikołajczyk,Lech Smoczyński,Mateusz Kuczyński,Paweł Wojtacha

doi:10.3390/molecules25184108

Mateusz Łuba, Bogusław Pierożyński + Show 4 more

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https://doi.org/10.3390/molecules25184108

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Abstract

This paper reports on the process of industrial-type wastewater purification carried-out through continuous anodic dissolution of aluminum alloy sacrificial anode for artificially aerated Cu-Al alloy galvanic (macro-corrosion) cells and synthetically prepared wastewater solutions. Electrochemical experiments were performed by means of a laboratory size electrolyzer unit, where the electrocoagulation process along with surface-induced electrooxidation phenomena were examined for wastewater containing Acid Mixture and Disperse Red 167 dyes. Final reduction of the dyes concentrations came to 32 and 99% for Acid Mixture and Disperse Red 167, correspondingly. The above was visualized through the employment of electrochemical (cyclic voltammetry and a.c. impedance spectroscopy techniques) and instrumental spectroscopy analyses.

Highlights

Water makes an environment for many living organisms, where its quality is crucial for human beings, animals, numerous plants, their habitats, and the ecosystem as a whole
An open-circuit voltage parameter for the Cu/Al alloy galvanic cell was examined in aerated, Na2 SO4- supporting electrolyte
Efficient purification of azo dye-based wastewater could successfully be performed through a combination of electrocoagulation and surface electrooxidation processes through the employment of

Summary

Introduction

Water makes an environment for many living organisms, where its quality is crucial for human beings, animals, numerous plants, their habitats, and the ecosystem as a whole. Today maintaining proper purity of water has become of superior importance, for local economies, and from the global point of view. Numerous important methods have been developed for wastewater treatment These primarily include a combination of the following techniques: physical, mechanical, biological, chemical and others. The process of the purification of wastewater from various pollutants is divided into five successive steps, which comprise: preliminary treatment or pre-treatment of wastewater (physical and mechanical), primary treatment (physico-chemical and chemical), secondary treatment or purification (chemical and biological), tertiary or final treatment (physical and chemical), and final treatment of the formed sludge [1,2]. Researchers from around the world strive to improve the commonly used wastewater treatment methods in order to reduce their total costs, optimize efficiency, and to diminish the production of intermediate pollutants

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