Electrode passivation, faradaic efficiency, and performance enhancement strategies in electrocoagulation—a review

Ingelsson, Markus; Yasri, Nael; Roberts, Edward P.L.

doi:10.1016/j.watres.2020.116433

Cited by 185 publications

(92 citation statements)

References 146 publications

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“…Then, freshly formed metal hydroxide species attract oppositely charged dye molecules, leading to their neutralization, destabilization, and formation of larger agglomerates that eventually sediment on the bottom of the reaction tank [ 31 , 32 , 33 ].…”

Section: Resultsmentioning

confidence: 99%

Electrodegradation of Acid Mixture Dye through the Employment of Cu/Fe Macro-Corrosion Galvanic Cell in Na2SO4 Synthetic Wastewater

et al. 2021

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Traditional wastewater purification processes are based on a combination of physical, chemical, and biological methods; however, typical electrochemical techniques for removing pollutants require large amounts of electrical energy. In this study, we report on a process of wastewater purification, through continuous anodic dissolution of iron anode for aerated Cu/Fe galvanic cell in synthetic Na2SO4 wastewater solution. Electrochemical experiments were conducted by means of a laboratory size electrolyzer, where electrocoagulation along with electrooxidation phenomena were examined for wastewater containing Acid Mixture dye. The above was visualized through the employment of electrochemical (cyclic voltammetry and ac impedance spectroscopy techniques) along with instrumental spectroscopy analyses.

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Section: Resultsmentioning

confidence: 99%

Electrodegradation of Acid Mixture Dye through the Employment of Cu/Fe Macro-Corrosion Galvanic Cell in Na2SO4 Synthetic Wastewater

et al. 2021

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“…Therefore, rational design of the structure of TENG, such as adjusting the rotation center angle ratio between each rotator and stator to obtain a full-waveform-pulse-current, will be a promising strategy to optimize the processes of SPES. It has been reported that alternating current exhibits many virtues such as lower energy consumption, improved mass transfer characteristic, and delayed electrode passivation compared to direct current in the electrochemical system [ 115 ]; thus, utilizing the alternating current of TENG to build SP electrode system is the other method to reduce the electrode passive and improve the electrochemical performance The electrode plays a key role in the electrochemical reaction. Therefore, the electrode materials are the most key factors to determine the properties of electrochemical reaction.…”

Section: Summary and Perspectivementioning

confidence: 99%

Recent Advances in Self-Powered Electrochemical Systems

Zhou

Liu

et al. 2021

Research

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Electrochemistry, one of the most important research and production technology, has been widely applicated in various fields. However, the requirement of external power source is a major challenge to its development. To solve this issue, developing self-powered electrochemical system (SPES) that can work by collecting energy from the environment is highly desired. The invention of triboelectric nanogenerator (TENG), which can transform mechanical energy into electricity, is a promising approach to build SPES by integrating with electrochemistry. In this view, the latest representative achievements of SPES based on TENG are comprehensively reviewed. By harvesting various mechanical energy, five SPESs are built, including electrochemical pollutants treatment, electrochemical synthesis, electrochemical sensor, electrochromic reaction, and anticorrosion system, according to the application domain. Additionally, the perspective for promoting the development of SPES is discussed.

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“…Additionally, electrocoagulation uses sacrificial electrode materials that deteriorate over time, and the efficiency of coagulant generation may be inhibited by electrode passivation. Electrode passivation may be minimized by using polarity reversal, mechanical cleaning, and other techniques summarized by Ingelsson et al (2020). Lastly, the electrodes used during electrocoagulation may potentially be a secondary source of metal contamination depending on the alloys used.…”

Section: Barriers To Implementationmentioning

confidence: 99%

Electrochemical technologies for per‐ and polyfluoroalkyl substances mitigation in drinking water and water treatment residuals

et al. 2021

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Water treatment technologies are needed that can convert per-and polyfluoroalkyl substances (PFAS) into inorganic products (e.g., CO 2 , F À ) that are less toxic than parent PFAS compounds. Research on electrochemical treatment processes such as electrocoagulation and electrooxidation has demonstrated proof-of-concept PFAS removal and destruction. However, research has primarily been conducted in laboratory matrices that are electrochemically favorable (e.g., high initial PFAS concentration [μg/L-mg/L], high conductivity, and absence of oxidant scavengers). Electrochemical treatment is also a promising technology for treating PFAS in water treatment residuals from nondestructive technologies (e.g., ion exchange, nanofiltration, and reverse osmosis). Future electrochemical PFAS treatment research should focus on environmentally relevant PFAS concentrations (i.e., ng/L), matrix conductivity, natural organic matter impacts, short-chain PFAS removal, transformation products analysis, and systems-level analysis for cost evaluation.

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Electrode passivation, faradaic efficiency, and performance enhancement strategies in electrocoagulation—a review

Cited by 185 publications

References 146 publications

Electrodegradation of Acid Mixture Dye through the Employment of Cu/Fe Macro-Corrosion Galvanic Cell in Na2SO4 Synthetic Wastewater

Electrodegradation of Acid Mixture Dye through the Employment of Cu/Fe Macro-Corrosion Galvanic Cell in Na2SO4 Synthetic Wastewater

Recent Advances in Self-Powered Electrochemical Systems

Electrochemical technologies for per‐ and polyfluoroalkyl substances mitigation in drinking water and water treatment residuals

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