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Employing electro-peroxone process for industrial wastewater treatment: a critical review

Aref Shokri and Mahdi Sanavi Fard

Jundi-Shapur Research Institute, Dezful, Iran

 

E-mail: aref.shokri3@gmail.com

Received: 14 February 2022  Accepted: 4 May 2022

Abstract:

Recently, the electro-peroxone process has advent rapidly as an efficient and new electrochemical advanced oxidation process (EAOP) to treat pollutants, which is operated through in situ generations of H2O2 from cathodic O2 reduction during the ozonation process. The electro-generated hydrogen peroxide leads to the improvement in ozone transformation to hydroxyl radical; hence, the electro-peroxone can considerably improve the treatment performance, total organic carbon (TOC) mineralization, and reduction of ozone-resistant emerging pollutants compared with the traditional ozonation process. Moreover, the main disadvantage of the traditional ozonation process for water treatment is bromate generation during the treatment of bromide-containing water sources, which can be remarkably decreased by the application of this technology. Additionally, because of its enhanced kinetics of contaminant degradation, electro-peroxone offers a more secure, time-efficient, energy-saving, and effective alternative for the reduction of emerging pollutants, compared with different ozone-dependent AOPs including traditional UV/O3 and peroxone (O3/H2O2) methods. Hence, it can offer a suitable, eco-friendly, and cost-effective approach to markedly enhance the efficiency of the current ozonation process. This paper reviews the principles of the electro-peroxone process and compares its efficiency with other methods. The essential reaction mechanisms and experimental parameters that are crucial to the operation, realization, and design of the electro-peroxone, including ozone dosage, applied current, injected ozone flowrate, electrolyte type, electrode setup, solution pH, and type of cathode and anode on electro-peroxone efficiency, are investigated. Moreover, the application of electro-peroxone for water and wastewater treatment is explored. Finally, the challenges in wide-ranging application of electro-peroxone, the future research direction, and its incorporation in wastewater and water treatment systems for viable application are discussed.

Keywords: Electro-peroxone; Synergetic effect; Advanced oxidation processes (AOPs); Hydroxyl radical; Wastewater treatment; Emerging contaminants

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-022-02269-y

 

Chemical Papers 76 (9) 5341–5367 (2022)

Thursday, May 30, 2024

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