Electrochemical dissolution of steel as a typical catalyst for electro-Fenton oxidation.

Veronika Kočanová,Libor Dušek

doi:10.1007/s00706-016-1688-8

Veronika Kočanová, Libor Dušek

Open Access

https://doi.org/10.1007/s00706-016-1688-8

Copy DOI

Abstract

Although traditional Fenton reaction is known for a long time, it is still a perspective method for removal of pollution from wastewater. Applications of electro-Fenton oxidation are commonly used in wastewater treatment. These methods are classified into groups—electrochemical advanced oxidation processes. Typical catalysts for these technologies are Fe2+ ions. Comparison between two material types of steel was investigated in this paper. Alloy steel Cr–Ni and non-alloy steel were used as a source of Fe2+ ions as catalyst for electro-Fenton oxidation. Electrochemical dissolution was chosen as a method of catalyst dosage. Various parameters were tested depending on the type of material of alloy and non-alloy steel at a time. Corrosion properties were also experimentally tested of both materials of steel anodes. Electrochemically dissolved Fe2+ and Fe3+ sludge could be very well removed from treated water by the sedimentation process. At first the solutions were adjusted, then loosely precipitated, and at the end sedimented. Residual concentrations of iron in the solutions determined by UV/VIS spectrophotometry were in compliance with the threshold limits stated by the government regulation.Graphical abstract

Highlights

In terms of wastewater treatment, commonly used techniques are based on Fenton, respectively electro-Fenton reaction
61035.23 24119.26 18358.88 electrochemical dissolution of a sacrificial anode Steel 17 240 Cr–Ni with a weight loss Dm in 250 cm3 singlechamber electrolytic cell at temperature 25 °C, current I, Electrochemical advanced oxidation processes (EAOPs) which are used in wastewater treatment could be based on electro-Fenton oxidation
Electrochemical dissolution of sacrificial steel anode was tested as an effective method of catalyst dosage

Summary

Introduction

In terms of wastewater treatment, commonly used techniques are based on Fenton, respectively electro-Fenton reaction. These techniques are included in electrochemical advanced oxidation processes (EAOPs) [1]. They could be applied to different types of contaminants of wastewater. The method of electro-Fenton oxidation is applied, especially in wastewater which is polluted by organic substances; see Fig. 1. It can remove drugs, phenol compounds, dyes, pesticides, and herbicides from the treated water [2].

Methods

Conclusion