Critical assessment of advanced oxidation processes and bio-electrochemical integrated systems for removing emerging contaminants from wastewater

Abstract

The remediation of emerging contaminants (ECs) of concern, such as personal care products, antibiotics, endocrine-disrupting chemicals (EDCs), surfactants, pesticides, etc., is the need of the hour. Conventional wastewater treatment technologies...

An Overview of Environmental Catalysis Mediated by Hydrogen Peroxide

“…It is clear that the overall evaluation of the feasibility of depuration procedures must involve the techno-economic aspects together with the environmental impact [101,310].…”

Effect of the anode material, applied current and reactor configuration on the atenolol toxicity during an electrooxidation process

“…Therefore, more advanced removal techniques are necessary to remove atenolol [ 9 ]. Amongst current tertiary and quaternary treatment technologies, advanced oxidation processes (AOPs) seem attractive methods to remove emerging contaminants from the aquatic ecosystems; specifically, electrochemical advanced oxidation processes (EAOPs), owing to their high effectiveness, easy handling due to the simpleness of the equipment and automation susceptibility, and low environmental impact since no chemical compounds are added and no secondary waste stream is produced [ 10 , 11 ]. During an EAOP, organic pollutants can be oxidized via two mechanisms, (i) direct oxidation, where the contaminant is oxidized directly by electron transfer from the anode surface, or (ii) indirect oxidation, where an oxidant species produced at the anode surface, such as hydroxyl radicals, mediates the electron transfer.…”

“…A complete oxidation requires the transformation of the organic pollutant into simple oxidation by-products, which are further fragmented to harmless inorganic compounds such as CO 2 and H 2 O (i.e., mineralization). However, sometimes the process can result in partial oxidation of the organic pollutant into by-products which are not mineralizable and may have harmful consequences for health [ 11 ]. For this reason, it is advisable to test water for toxicity after applying an EAOP.…”

Green-Activated Charcoal-Anchored Iron Oxide-Driven Microbial Electro-Fenton System for Sustainable Mitigation of Refractory Contaminants

“…In heterogeneous EF technologies, iron-based carbon and metal composite catalysts are predominant owing to their low toxicity and superior catalytic performance. , However, traditional synthesis of these catalysts often comes with the caveats of high cost and adverse environmental impacts, which tarnishes the overall sustainability of the BEF process. Alternatively, a waste-derived catalyst can be an effective way to reduce the environmental footprint of oxidative treatments.…”