Recent Developments in Electrochemical Technology for Water and Wastewater Treatments

Abstract

This paper presents the recent attention in scientific studies and development of electrochemical processes. Electrochemical technology has contributed significantly to the purification of water for better human health and aquatic life forms. In this study, we emphasize the developmental trends of electrochemical technologies, their applications, and recent developments in the context of water and wastewater treatments. Recent studies have made great advances in investigating and optimizing advanced electrochemical oxidation processes in treatment of various organic pollutants, reduction of halogenated contaminants, and disinfection of microorganisms. Besides, electrochemical oxidation processes have been combined with other treatment methods to enable their practical application. Excellent electro-catalytic treatment of contaminant and their by-products was achieved through the application of mixed metal oxides (PbO 2 , SnO 2 , Ti/RuO 2 , etc.), Pt, and boron-doped diamond (BDD) electrodes. Several studies have focused on selective removal of trace pollutants in a complex matrix. These studies have shown the possibility of removing target pollutants with relatively low energy consumption. It can be concluded that enhancement of treatment performance of the present technologies will contribute to a wider application of electrochemical processes in water and wastewater treatment.

Removing of Direct Red 83:1 using α- and HP-α-CDs polymerized with epichlorohydrin: Kinetic and equilibrium studies

“…Current methodology employed to reduce this problem, deals with a combination of chemical, physical and biological techniques. In this sense, adsorption, membranefiltration, coagulation, flocculation, flotation, precipitation, oxidation, aerobic and anaerobic microbial degradation processes, have been developed for the removal of dyes from industrial effluents [5]. However, some of these approaches are expensive, have a very low efficiency or seem to be impracticable because of the production of toxic byproducts [6].…”

Photoctalytic Efficiency of Silver Doped TiO₂-PC500 for Dyes Removal from Water under UV and Solar Radiations: Comparative Study

“…The two dyes used, CR and CV, were from Biochem (Cosne-Cours-sur-Loire, France). HCl, HNO 3 and NaOH of analytical grade were from Fluka. Double distilled water was used through the experiments.…”

“…Several viable processes for wastewaters treatment have been developed. These include physical processes such as adsorption [2], electrochemical processes [3], coagulation, reverse osmosis and membrane processes [4] and chemical processes such as ozonation, ultraviolet (UV) ozonation, Fenton, photo-Fenton etc. [5].…”

Demulsification of Cutting Oil Emulsion by Electro-Oxidation Process: Batch and Continuous Mode

“…Excluding these mediators, • OCl free radicals, nascent oxygen and free chlorine and were formed in electrolytic oxidation and mediate the oxidation of organics. 21,22,24,[28][29][30]…”