Perfluorooctane sulfonate (PFOS) removal with Pd0/nFe0 nanoparticles: Adsorption or aqueous Fe-complexation, not transformation?

Park, Saerom; Zenobio, Jenny E.; Lee, Linda

doi:10.1016/j.jhazmat.2017.08.001

Cited by 44 publications

(20 citation statements)

References 56 publications

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“…The limit of detection for PFOS, at a signal-to-noise ratio of 3, is 0.15 pM, which is far lower than the most recent United States Environmental Protection Agency Provisional Health Advisory values (1.3 × 10 –10 M of PFOS for drinking water). 43 Moreover, the result is compared to that obtained by LC–MS and is lowest among the reported results by other sensors (Table 1).…”

Section: Results and Discussionmentioning

confidence: 85%

Surfactant-Sensitized Covalent Organic Frameworks-Functionalized Lanthanide-Doped Nanocrystals: An Ultrasensitive Sensing Platform for Perfluorooctane Sulfonate

Zhang

Yin

et al. 2019

ACS Omega

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Perfluorooctane sulfonate (PFOS) known as a persistent organic pollutant has been attracting great interests due to its potential ecotoxicity. An approach capable of sensing ultra-trace PFOS is in urgent demand. Here, we developed an approach for highly sensitive sensing PFOS using surfactant-sensitized covalent organic frameworks (COFs)-functionalized upconversion nanoparticles (UCNPs) as a fluorescent probe. COFs-functionalized UCNPs (UCNPs@COFs) were obtained by solvothermal growth of 1,3,5-triformylbenzene and 1,4-phenylenediamine on the surface of UCNPs. COF’s layer on the surface of UCNPs not only provides recognition sites for PFOS but also improves the fluorescence quantum yields from 2.15 to 5.12%. Trace PFOS can quench the fluorescence emission of UCNPs@COFs at 550 nm due to the high electronegativity of PFOS. Moreover, the fluorescence quenching response can be significantly strengthened in the presence of a surfactant, which causes more sensitivity. The fluorescence quenching degrees (F0 – F) of the system are linear with the concentration of PFOS in the range of 1.8 × 10–13 to 1.8 × 10–8 M. The present sensor can sensitively and selectively detect PFOS in tap water and food packing with the limit of detection down to 0.15 pM (signal-to-noise ratio = 3), which is comparable to that of the liquid chromatography–mass spectrometry technique. The proposed approach realized a simple, fast, sensitive, and selective sensing PFOS, showing potential applications in various fields.

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Section: Results and Discussionmentioning

confidence: 85%

Surfactant-Sensitized Covalent Organic Frameworks-Functionalized Lanthanide-Doped Nanocrystals: An Ultrasensitive Sensing Platform for Perfluorooctane Sulfonate

Zhang

Yin

et al. 2019

ACS Omega

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“…Meanwhile, increasing temperature to 60°C showed decomposition of PFAS by ZVI in the presence of PS, and formation of short‐chain PFAS was identified. Along with higher temperatures, the presence of PS accelerated oxidation of ZVI to Fe oxides and Fe hydroxides with high affinity for PFAS, which was supported by fast color change of the reaction solution to reddish brown (Parenky, Gevaerd de Souza, Asgari, et al, 2020; Park et al, 2018). Importantly, only the case of RAC in the presence of PS at 60°C exhibited reaction byproducts.…”

Section: Resultsmentioning

confidence: 94%

“…Formation of Fe oxides and Fe hydroxides around core ZVI due to its oxidation has been reported (Choi et al, 2009). Higher temperatures are expected to rapidly oxidize ZVI to various Fe derivatives which also remove PFAS via either adsorption or complexation mechanism (Parenky, Gevaerd de Souza, Asgari, et al, 2020; Park et al, 2018).…”

Section: Resultsmentioning

confidence: 99%

Removal of perfluoroalkyl and polyfluoroalkyl substances in water and water/soil slurry using Fe⁰‐modified reactive activated carbon conjugated with persulfate

Souza

Parenky

Nguyen

et al. 2021

Water Environment Research

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Treatment of highly persistent perfluoroalkyl and polyfluoroalkyl substances (PFAS) has been a challenging but significant task. Herein, we propose adsorption-mediated chemical decomposition of PFAS implemented by using granular activated carbon (GAC) impregnated with zerovalent nanoiron (ZVI, Fe 0 ), so-called reactive activated carbon (RAC). The effects of reaction temperature, injection of persulfate (PS), and presence of soil on removal of PFAS in water were evaluated. Results showed that RAC conjugated with PS at 60 C exhibited decomposition of PFAS, exclusively all three carboxylic PFAS tested, obviously producing various identifiable short-chain PFAS. Carboxylic PFAS were removed via physical adsorption combined with chemical decomposition while sulfonic PFAS were removed via solely adsorption mechanism. The presence of soil particles did not greatly affect the overall removal of PFAS. Carbon mass balance suggested that chemical oxidation by radical mechanisms mutually influences, in a complex manner, PFAS adsorption to GAC, ZVI and its iron derivatives, and soil particles. Nonetheless, all tested six PFAS were removed significantly. If successfully developed, the adsorption-mediated decomposition strategy may work for treatment of complex media containing PFAS and co-contaminants under different environmental settings. Practitioners Points• Treatment of persistent per-and polyfluoroalkyl substances (PFAS) was addressed.• Activated carbon with zerovalent iron was examined in the presence of persulfate.• The system significantly removed and decomposed PFAS in water and soil mixture.complex media, granular activated carbon, perfluoroalkyl and polyfluoroalkyl substances, persulfate, zerovalent iron Hyeok Choi is a member of the Water Environment Federation (WEF).

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“…Those PFASs have high persistence, bioaccumulation and toxicity, and has been ubiquitously detected in the global environmental and biological matrices [2,6], thus posing great risks to environment, biota and human health [7,8]. However, due to the extremely high stability of C-F bond (~116 kcal/mol, almost thestrongest in nature [2]), defluorination of PFASs is not an easy task [9][10][11]. Current advanced treatments include sonochemical destruction [12], electrochemical oxidation [13], radiochemical irradiation [14], microwave-hydrothermally induced persulfate oxidation [15], hydrated electron based photoreduction [16], elimination by zerovalent iron in subcritical water [17] and plasma chemical degradation [18].…”

Section: Introductionmentioning

confidence: 99%

Vitamin B12 (CoII) initiates the reductive defluorination of branched perfluorooctane sulfonate (br-PFOS) in the presence of sulfide

Sun

Geng

Zhang

et al. 2021

Chemical Engineering Journal

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Due to the extremely high stability of perfluorooctane sulfonate (PFOS), effective defluorination is difficult. Previous studies indicated that PFOS can be decomposed under the catalysis of vitamin B12 (VB12) with strong artificial reductants such as Ti(III)-citrate and nZn 0 . In this study, we explored if naturally occurring reductant like sulfide (S 2− ) could initiate the reaction. In S 2− /VB12 system, branched PFOS (br-PFOS) can undergo effective decomposition and defluorination at the temperature of 70 • C and pH greater than 12. The degradation of br-PFOS fits pseudo-first-order kinetic with a rate constant of 0.0984 ± 0.0034 d -1 in the presence of 30 mM Na 2 S and 300 μM VB12, while linear PFOS (L-PFOS) remained stable during 30 d reaction process. UV-Vis spectral characterization indicates that S 2− reduces VB12(Co III ) to Co II , which is able to initiate the reductive defluorination. Based on the product analysis, HF/2F elimination followed by C-C scission is the dominant degradation pathway of br-PFOS instead of stepwise H/F exchange. The primary products include F − and polyfluorinated sulfonates and carboxylates. The degradation of br-PFOS is strongly dependent on temperature due to a relatively high apparent activation energy of 62.86 kJ/mol. Strong alkaline condition can greatly enhance the decomposition efficiency since S 2− is the primary reactive form. This study provides new insights into the VB12-catalyzed defluorination of PFOS and a feasible approach for future natural or engineered remediations of br-PFOS.

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Perfluorooctane sulfonate (PFOS) removal with Pd0/nFe0 nanoparticles: Adsorption or aqueous Fe-complexation, not transformation?

Cited by 44 publications

References 56 publications

Surfactant-Sensitized Covalent Organic Frameworks-Functionalized Lanthanide-Doped Nanocrystals: An Ultrasensitive Sensing Platform for Perfluorooctane Sulfonate

Surfactant-Sensitized Covalent Organic Frameworks-Functionalized Lanthanide-Doped Nanocrystals: An Ultrasensitive Sensing Platform for Perfluorooctane Sulfonate

Removal of perfluoroalkyl and polyfluoroalkyl substances in water and water/soil slurry using Fe⁰‐modified reactive activated carbon conjugated with persulfate

Vitamin B12 (CoII) initiates the reductive defluorination of branched perfluorooctane sulfonate (br-PFOS) in the presence of sulfide

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Perfluorooctane sulfonate (PFOS) removal with Pd0/nFe0 nanoparticles: Adsorption or aqueous Fe-complexation, not transformation?

Cited by 44 publications

References 56 publications

Surfactant-Sensitized Covalent Organic Frameworks-Functionalized Lanthanide-Doped Nanocrystals: An Ultrasensitive Sensing Platform for Perfluorooctane Sulfonate

Surfactant-Sensitized Covalent Organic Frameworks-Functionalized Lanthanide-Doped Nanocrystals: An Ultrasensitive Sensing Platform for Perfluorooctane Sulfonate

Removal of perfluoroalkyl and polyfluoroalkyl substances in water and water/soil slurry using Fe0‐modified reactive activated carbon conjugated with persulfate

Vitamin B12 (CoII) initiates the reductive defluorination of branched perfluorooctane sulfonate (br-PFOS) in the presence of sulfide

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Removal of perfluoroalkyl and polyfluoroalkyl substances in water and water/soil slurry using Fe⁰‐modified reactive activated carbon conjugated with persulfate