Evidence of heterogeneous degradation of PFOA by activated persulfate – FeS as adsorber and activator

Sühnholz, Sarah; Gawel, Alina; Kopinke, Frank‐Dieter; Mackenzie, Kenneth D.

doi:10.1016/j.cej.2021.130102

Cited by 28 publications

(4 citation statements)

References 65 publications

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“…With appropriate band edge placements, effective electron and hole transfer from different semiconductors can considerably reduce energy-wasting photo-induced electron-hole pair recombination and enhance charge carrier lifetime, boosting photocatalytic efficiency. Many researchers have found that the catalytic breakdown of PFAS (Perfluoroalkyl substances), pharmaceuticals, and other resistant pollutants is heavily influenced by initial pH, photocatalyst type and band structure, initial pollutant concentration, irradiation type, catalyst dosage, wastewater matrix, and catalyst calcination temperature, all of which are discussed in this section (Sühnholz et al 2021;Yuan et al 2022). A wide spectrum of newly invented heterojunctions will be addressed in this section, emphasizing improving their photoactivity for industrial wastewater remediation.…”

Section: Factors Affecting the Degradation Of Hazardous Contaminants ...mentioning

confidence: 99%

Solar photo-oxidation of recalcitrant industrial wastewater: a review

et al. 2022

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Conventional methods to clean wastewater actually lead to incomplete treatments, calling for advanced technologies to degrade recalcitrant pollutants. Herein we review solar photo-oxidation to degrade the recalcitrant contaminants in industrial wastewater, with focus on photocatalysts, reactor design and the photo-Fenton process. We discuss limitations due to low visible-light absorption, catalyst collection and reusability, and production of toxic by-products. Photodegradation of refractory organics by solar light is controlled by pH, photocatalyst composition and bandgap, pollutant properties and concentration, irradiation type and intensity, catalyst loading, and the water matrix.

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Section: Factors Affecting the Degradation Of Hazardous Contaminants ...mentioning

confidence: 99%

Solar photo-oxidation of recalcitrant industrial wastewater: a review

et al. 2022

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“…3) (Hou, et al, 2022). Therefore, FeS have been used in recent years to activate PS for the degradation of organic pollutants (Sühnholz, et al, 2021;Xiang, et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Synthesis and application of iron sulfide−based materials to activate persulfates for wastewater remediation: a review

Sun

Liu

Fan

et al. 2023

Front. Environ. Sci.

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Rapid industrial development has led to excessive levels of various contaminants in natural water, which poses a challenge to the innovation of environmental remediation technology. In recent years, iron sulfide and its modified materials have attracted extensive attention in environmental remediation due to their high activity in advanced oxidation processes and widespread existence in anoxic environment. This paper reviewed the latest advances of the synthesis methods for iron sulfide and modified FeS. In addition, the application of persulfate activation by iron sulfide materials (FeS, FeSx, S−ZVI, FeS@Carbon materials and MFexSy) for contaminants remediation is also reviewed, and the enhancement of this system by photo irradiation, ultrasound, and microwave have also been concluded. Additionally, the interaction mechanism of iron sulfide and persulfate with contaminants was reviewed. Based on the above contents, we concluded that the long−term stability of iron sulfide, the toxicity to organisms of iron sulfide materials in the treated water, and the combination of FeS/PS with other assisted technologies should be focused in future.

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“…•− generated by FeS/peroxydisulfate (PDS) system was proved to efficiently decompose perfluorinated carboxylic acids (PFCAs) via electron transfer. 25 Among the various persulfate activation methods for the in situ generation of SO 4…”

Section: Introductionmentioning

confidence: 99%

“…Also, SO 4 •– has the potential to degrade refractory organic pollutants. For instance, SO 4 •– generated by FeS/peroxydisulfate (PDS) system was proved to efficiently decompose perfluorinated carboxylic acids (PFCAs) via electron transfer . Among the various persulfate activation methods for the in situ generation of SO 4 •– , peroxide bond breakage of PDS by direct ultraviolet activation (UV/PDS) has been considered a simple, effective, and environmentally friendly way to generate SO 4 •– with high quantum efficiency. , …”

Section: Introductionmentioning

confidence: 99%

Role of Substituents in the Removal of Emerging Fluorinated Liquid Crystal Monomer Pollutants under the UV/Peroxydisulfate Treatment

Shen

et al. 2022

ACS EST Eng.

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Fluorinated liquid crystal monomers (LCMs) have been identified as emerging persistent and bioaccumulative chemicals with non-negligible environmental concentrations. Herein, 12 fluorinated LCMs including highly detected 4-ethoxy-2,3-difluoro-4′-(trans-4-propylcyclohexyl)biphenyl (EDPB) were selected as target fluorinated LCMs to investigate their structure–reactivity relationships by the ultraviolet/peroxydisulfate (UV/PDS) treatment. EDPB with biphenyl and ethoxy showed the highest first-order degradation rate constant of 1.93 h–1, while that of fluorinated LCMs with ethoxy (1.10–1.26 h–1) and biphenyl (0.45–0.56 h–1) and without biphenyl or ethoxy (0.27–0.30 h–1) decreased sequentially. HO• and SO4 •– were identified as the main oxidative species in the UV/PDS treatment. Theoretical calculation suggested that biphenyl and ethoxy can significantly alter the electron distribution of LCM molecules, providing more attackable sites for HO• and SO4 •– on LCMs with biphenyl or ethoxy. Oxalic acid, cyclohexane, and bicyclohexane were the main degradation products of fluorinated LCMs even though their degradation pathways were determined by their different molecular structures. Toxicity estimation revealed that fluorinated LCMs with high acute toxicity and developmental toxicity could be decomposed into some final products with less toxicity. This study is expected to fill knowledge gaps in the structure–activity relationships of fluorinated LCMs by the UV/PDS treatment.

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Evidence of heterogeneous degradation of PFOA by activated persulfate – FeS as adsorber and activator

Cited by 28 publications

References 65 publications

Solar photo-oxidation of recalcitrant industrial wastewater: a review

Solar photo-oxidation of recalcitrant industrial wastewater: a review

Synthesis and application of iron sulfide−based materials to activate persulfates for wastewater remediation: a review

Role of Substituents in the Removal of Emerging Fluorinated Liquid Crystal Monomer Pollutants under the UV/Peroxydisulfate Treatment

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