Electrochemical Advanced Oxidation Processes, Formation of Halogenate and Perhalogenate Species: A Critical Review

Bergmann, M. E. Henry; Koparal, Ali Savaş; Iourtchouk, Tatiana

doi:10.1080/10643389.2012.718948

Cited by 77 publications

(51 citation statements)

References 216 publications

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“…Hence, further research should be carried out to prevent the oxidation of hypochlorite by hydroxyl radical taking into account the hazardousness of chlorates and perchlorates. The occurrence of these species has been largely reported in other wastewater treatments carried out with diamond anodes and even in disinfection of water and reclaimed wastewater, and currently, it is a major concern for the use of diamond electrolysis in many applications (Bergmann et al 2014;Greer et al 2002). …”

Section: Formation Of Soluble Phosphate and Sulfatementioning

confidence: 99%

Treatment of synthetic urine by electrochemical oxidation using conductive-diamond anodes

Dbira

Bensalah

Boutarfaïa

et al. 2014

Environ Sci Pollut Res

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In this work, the electrochemical oxidation of synthetic urine by anodic oxidation using boron-doped diamond as anode and stainless steel as cathode was investigated. Results show that complete depletion of chemical oxygen demand (COD) and total organic carbon (TOC) can be attained regardless of the current density applied in the range 20-100 mA cm(-2). Oxalic and oxamic acids, and, in lower concentrations, creatol and guanidine were identified as the main intermediates. Chloride ions play a very important role as mediators and contribute not only to obtain a high efficiency in the removal of the organics but also to obtain an efficient removal of nitrogen by the transformation of the various raw nitrogen species into gaseous nitrogen through chloramine formation. The main drawback of the technology is the formation of chlorates and perchlorates as final chlorine products. The increase of current density from 20 to 60 mA cm(-2) led to an increase in the rate of COD and TOC removals although the process becomes less efficient in terms of energy consumption (removals of COD and TOC after applying 18 Ah dm(-3) were 93.94 and 94.94 %, respectively, at 20 mA cm(-2) and 89.17 and 86.72 %, respectively, at 60 mA cm(-2)). The most efficient conditions are low current densities and high temperature reaching total mineralization at an applied charge as low as 20 kAh m(-3). This result confirmed that the electrolysis using diamond anodes is a very interesting technology for the treatment of urine.

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Section: Formation Of Soluble Phosphate and Sulfatementioning

confidence: 99%

Treatment of synthetic urine by electrochemical oxidation using conductive-diamond anodes

Dbira

Bensalah

Boutarfaïa

et al. 2014

Environ Sci Pollut Res

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“…Nevertheless, we observed a wave near 1.0 V attributed to the electroreduction of Br 2 produced in reaction (2) with the consumption of H + migrating across the membrane from the negative electrode. We also saw a more negative wave below 0.5 V which we tentatively attribute either to the direct electroreduction of bromate on carbon [53] or to the electroreduction of an intermediate hypobromite.…”

Section: Resultsmentioning

confidence: 85%

Energy cycle based on a high specific energy aqueous flow battery and its potential use for fully electric vehicles and for direct solar-to-chemical energy conversion

Tolmachev

Piatkivskyi

Ryzhov

et al. 2015

J Solid State Electrochem

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A flow battery employing H 2 as the fuel and one or more of highly soluble halate salts (such as 50 % w/w LiBrO 3 aq.) as the oxidant presents a viable opportunity as a power source for fully electric vehicles which meets the specific energy, specific power, energy efficiency, cost, safety, and refill time requirements. We further disclose a process of regeneration of the fuel and the oxidant from the discharged halide salt and water using electric (or solar) energy as the only input and generating no chemical waste. The cycle of discharge and regeneration takes advantage of pH-driven comproportionation and disproportionation reactions, respectively, and of pH manipulation using an orthogonal ion migration across laminar flow (OIMALF™) reactor.

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“…[20,24,29] Consequently, EAOP has drawn increasing attention, which can be evidenced by the number of publications shown in Figure 1, and witnessed by recently published reviews [20,23,24,26,[30][31][32][33][34].…”

Section: Aop /Eaopmentioning

confidence: 99%

“…Advanced oxidation process (AOP) has received world-wide attention in last decades [23]. It uses radicals, typically hydroxyl radicals (•OH), to attack the POPs and degrade them into fragments or inorganic ions / molecules [24].…”

Section: Aop /Eaopmentioning

confidence: 99%

Electrochemical Advanced Oxidation Processes (EAOP) to degrade per- and polyfluoroalkyl substances (PFASs)

Fang

Megharaj

Naidu

2017

Journal of Advanced Oxidation Technologies

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Abstract:Per-and polyfluoroalkyl substances (PFASs) have been recently listed as emerging contaminants (ECs) and persistent organic pollutants (POPs) due to their human and environmental health concerns. In the last 10 years, their detection and remediation have progressed significantly. Herein, we critically review recent developments in electrochemical advanced oxidation process (EAOP) towards their remediation. Particular attentions are paid to perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA), which present the main concerns of PFASs at this time. Due to the persistence of those PFASs, other remediation approaches may experience difficulty in degrading them, whilst EAOP has demonstrated success. The fundamentals of EAOP are highlighted and the scale-up application is discussed regarding the future research directions.

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Electrochemical Advanced Oxidation Processes, Formation of Halogenate and Perhalogenate Species: A Critical Review

Cited by 77 publications

References 216 publications

Treatment of synthetic urine by electrochemical oxidation using conductive-diamond anodes

Treatment of synthetic urine by electrochemical oxidation using conductive-diamond anodes

Energy cycle based on a high specific energy aqueous flow battery and its potential use for fully electric vehicles and for direct solar-to-chemical energy conversion

Electrochemical Advanced Oxidation Processes (EAOP) to degrade per- and polyfluoroalkyl substances (PFASs)

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