A review on superior advanced oxidation and photocatalytic degradation techniques for perfluorooctanoic acid (PFOA) elimination from wastewater

Zango, Zakariyya Uba; Khoo, Kuan Shiong; Garba, Abdurrahman; Kadir, Haliru Aivada; Usman, Fahad; Zango, Muttaqa Uba; Oh, Wen Da; Lim, Jun Wei

doi:10.1016/j.envres.2023.115326

Cited by 59 publications

(7 citation statements)

References 170 publications

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“…To further investigate the PFOA degradation mechanism on the cathode-mediated electrochemical process, the degradation intermediates with Fe 0.6 NiC, FeC, and NiC cathodes were detected and quantified in Figure c and Table S2. The short-chain perfluorocarboxylic acids (PFCAs) including PFHpA (C7), PFHrA (C6), PFPeA (C5), PFBA (C4), PFPrA (C3), and TFA (C2) were found as the major products with Fe 0.6 NiC as the cathode . Intermediate C7 has the highest concentration, and the concentrations of other intermediates were gradually decreased with as the carbon chain decreased from C7 to C2.…”

Section: Resultsmentioning

confidence: 99%

“…The shortchain perfluorocarboxylic acids (PFCAs) including PFHpA (C7), PFHrA (C6), PFPeA (C5), PFBA (C4), PFPrA (C3), and TFA (C2) were found as the major products with Fe 0.6 NiC as the cathode. 46 Intermediate C7 has the highest concentration, and the concentrations of other intermediates were gradually decreased with as the carbon chain decreased from C7 to C2. This phenomenon indicates that the produced PFCAs intermediates would be further oxidized to shorter chain PFCAs, followed by mineralization to CO 2 and released F − .…”

Section: ■ Experimental Sectionmentioning

confidence: 95%

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Controllable Generation of Sulfate and Hydroxyl Radicals to Efficiently Degrade Perfluorooctanoic Acid in Cathode-Dominated Electrochemical Process

Lei,

Liu,

Yang

et al. 2023

ACS EST Water

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Sulfate radical-based advanced oxidation process (SO 4•− -AOP) has been considered as a potential PFOA treatment option. The synergistic effect of SO 4•− and hydroxyl radicals (HO • ) favors the mineralization of PFOA. However, research regarding the optimal PFOA degradation pathway with controllable SO 4•− and HO • is limited. Here, we proposed a cathodemediated electrochemical process for efficiently removing PFOA through the in situ generation of SO 4•− and HO • . Iron−nickel codoped carbon aerogel (Fe x NiC) were designed as cathode for synergistically activating peroxymonosulfonate (PMS) and oxygen (O 2 ). Fe 0.6 NiC with optimized C SO4•-(0.385 mM) and C HO• (0.175 mM) exhibited high PFOA degradation efficiency (83.8%), TOC removal (75.9%), and defluorination rate (63.6%). DFT calculations and experimental studies confirmed that SO 4•− -involved steps promote one-electron transfer from ionic C 7 F 15 COO − to SO 4 •−, and HO • -involved steps yield short-chain PFCAs. The actual application for pretreatment and deep-treatment of fluorochemical wastewater in the conventional treatment systems promoted the PFOA mineralization efficiency. It can be preferable to optimize the ratio of C SO4•-and C HO• in this cathode-mediated electrochemical process to rapidly and economically mineralize PFOA.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Experimental Sectionmentioning

confidence: 95%

Controllable Generation of Sulfate and Hydroxyl Radicals to Efficiently Degrade Perfluorooctanoic Acid in Cathode-Dominated Electrochemical Process

Lei,

Liu,

Yang

et al. 2023

ACS EST Water

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“…[402][403][404] Photo-assisted electrochemical processes demonstrated enhanced degradation efficiencies of fluorinated compounds compared to dark electrochemical processes. 260,341,405,406 The photo-Fenton process was utilized to increase transient radical concentrations compared to those generated by the dark Fenton process 407 and concomitantly enhanced PFAS degradation. 408 Addition of auxiliary chemicals to the electrochemical system benefitted the overall degradation efficiency of PFAS chemicals.…”

Section: Electrocatalytic Aqueous Generation Mechanisms Of Reactive S...mentioning

confidence: 99%

Advanced electrocatalytic redox processes for environmental remediation of halogenated organic water pollutants

Wilsey,

Taseska,

Meng

et al. 2023

Chem. Commun.

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“…[1] However, these methods have been reported as inefficient due to certain contaminants in wastewater being resistant to treatment to some extent. [2] Therefore, a novel advanced treatment method is needed to degrade the organic contents in the wastewater.…”

Section: Introductionmentioning

confidence: 99%

“…Chemical manufacturing industries have traditionally used various wastewater treatment techniques, including chemical oxidation, biological treatment, electrochemical decomposition, photo catalytic, physical, and physico‐chemical treatment [1] . However, these methods have been reported as inefficient due to certain contaminants in wastewater being resistant to treatment to some extent [2] . Therefore, a novel advanced treatment method is needed to degrade the organic contents in the wastewater.…”

Section: Introductionmentioning

confidence: 99%

Progress of Copper‐based Nanocatalysts in Advanced Oxidation Degraded Organic Pollutants

Li,

You,

et al. 2024

ChemCatChem

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To address global pollution caused by contaminants in water bodies, it is crucial to develop an efficient and environmentally friendly treatment process for wastewater from various industries. Advanced oxidation processes (AOPs) have proven to be highly effective in wastewater treatment due to their high oxidation efficacy and the absence of secondary pollutants. Different methods such as ozone, Fenton, electrochemical, photolysis, and sonolysis can be used in AOPs to degrade emerging pollutants that are resistant to conventional methods. In recent years, nanotechnology has emerged as a viable solution, with various nanomaterials being developed for wastewater treatment. Among them, copper‐based nanocatalysts have shown great potential in AOPs. This review focuses on the progress and mechanisms of copper‐based nanocatalysts in wastewater treatment via AOPs. It also discusses the challenges associated with oxidation, electrochemistry, Fenton, and photocatalysis in wastewater treatment processes.

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A review on superior advanced oxidation and photocatalytic degradation techniques for perfluorooctanoic acid (PFOA) elimination from wastewater

Cited by 59 publications

References 170 publications

Controllable Generation of Sulfate and Hydroxyl Radicals to Efficiently Degrade Perfluorooctanoic Acid in Cathode-Dominated Electrochemical Process

Controllable Generation of Sulfate and Hydroxyl Radicals to Efficiently Degrade Perfluorooctanoic Acid in Cathode-Dominated Electrochemical Process

Advanced electrocatalytic redox processes for environmental remediation of halogenated organic water pollutants

Progress of Copper‐based Nanocatalysts in Advanced Oxidation Degraded Organic Pollutants

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