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1. Environmental contamination and human exposure to PFASs near a fluorochemical production plant: Review of historic and current PFOA and GenX contamination in the Netherlands

Author:
Gebbink, Wouter A.; van Leeuwen, Stefan P.J.
Source:
Environment international 2020 v.137 pp. 105583
ISSN:
0160-4120
Subject:
perfluorooctanoic acid,   etc   ; pollution; Netherlands;     Show all 3 Subjects
Abstract:
... Fluorochemical production plants (FPP) are primary emission sources of per- and polyfluoroalkyl substances (PFASs) to the local environment. An FPP located in the Netherlands has historically used perfluorooctanoic acid (PFOA) for fluoropolymer production and is currently using GenX (HFPO-DA; 2,3,3,3-tetrafluoro-2-(heptafluoropropoxy)propionic acid) as a replacement. This study reviewed existing d ...
DOI:
10.1016/j.envint.2020.105583

2. Assessment of perfluoroalkyl substances in placenta by coupling salt assisted liquid-liquid extraction with dispersive liquid-liquid microextraction prior to liquid chromatography-tandem mass spectrometry

Author:
Vela-Soria, F.; García-Villanova, J.; Mustieles, V.; de Haro, T.; Antignac, J.P.; Fernandez, M.F.
Source:
Talanta 2021 v.221 pp. 121577
ISSN:
0039-9140
Subject:
perfluorooctanoic acid,   etc   ; animal tissues; chemometrics; endocrine-disrupting chemicals; environmental monitoring; humans; liquid chromatography; liquid-phase microextraction; perfluorocarbons; perfluorooctane sulfonic acid; placenta; standard deviation; sulfonates; tandem mass spectrometry;     Show all 14 Subjects
Abstract:
... The widespread use of perfluoroalkyl substances (PFAS) is resulting in a broad human exposure to these endocrine disrupting chemicals (EDCs), prompting biomonitoring research to evaluate its magnitude and impact, especially during critical windows of exposure such as fetal and perinatal periods. This study was focused on developing a method to determine 10 PFAS in placental tissue by combining sal ...
DOI:
10.1016/j.talanta.2020.121577

3. Removal of hydrocarbon contaminants from water with perfluorocarboxylated UiO-6X derivatives

Author:
DeChellis, Dante M.; Ngule, Chrispus M.; Genna, Douglas T.
Source:
Journal of materials chemistry A 2020 v.8 no.12 pp. 5848-5852
ISSN:
2050-7496
Subject:
perfluorooctanoic acid,   etc   ; droplets; hydrophobicity; solvents;     Show all 4 Subjects
Abstract:
... We report that treatment of UiO-66 and UiO-67 with perfluorooctanoic acid (PFOA) and heptafluorobutyric acid (HFBA) not only render the MOF hydrophobic but also capable of removing hydrocarbon contaminants from water. Additionally HFBA@UiO-66 can coat water droplets, yielding liquid marbles that can be placed in organic solvents without dissolution or dispersal. ...
DOI:
10.1039/c9ta11144a

4. Discerning the inefficacy of hydroxyl radicals during perfluorooctanoic acid degradation

Author:
Javed, Hassan; Lyu, Cong; Sun, Ruonan; Zhang, Danning; Alvarez, Pedro J.J.
Source:
Chemosphere 2020 v.247 pp. 125883
ISSN:
0045-6535
Subject:
perfluorooctanoic acid,   etc   ; byproducts; hydrogen peroxide; hydroxyl radicals; nitrobenzenes; oxidation; photolysis;     Show all 7 Subjects
Abstract:
... Perfluorooctanoic acid (PFOA) is a recalcitrant contaminant of emerging concern, and there is growing interest in advanced oxidation processes to degrade it. However, there is ambiguity in the literature about the efficacy of hydroxyl radicals (OH) for degrading PFOA. Here, we resolve this controversy by comparing PFOA degradation by UV photolysis (254 nm, 6 × 10⁻⁶ E/L.s) versus UV + H₂O₂, which p ...
DOI:
10.1016/j.chemosphere.2020.125883

5. Fabrication of pre-wetting induced superamphiphobic meshes for on-demand oil-water separation of light or heavy oil-water mixtures

Author:
Xu, Shuangshuang; Wang, Qing; Wang, Ning
Source:
Colloids and surfaces 2020 v.602 pp. 125095
ISSN:
0927-7757
Subject:
perfluorooctanoic acid,   etc   ; energy; ethanol; evaporation; hydrophobicity; oils; porous media; presoaking; stainless steel; wettability;     Show all 10 Subjects
Abstract:
... In this study, a facile approach was proposed to fabricate superamphiphobic meshes for on-demand separating light or heavy oil and water mixtures after pre-wetting process. The micro-nano hierarchical structures on superamphiphobic stainless steel mesh were fabricated via vacuum thermal evaporation and chemical deposition. Low surface energy was acquired by modification with perfluorooctanoic acid ...
DOI:
10.1016/j.colsurfa.2020.125095

6. Electrochemical mineralization mechanisms of perfluorooctanoic acid in water assisted by low frequency ultrasound

Author:
Xu, Lei; Qian, Xubin; Wang, Kaixuan; Fang, Cheng; Niu, Junfeng
Source:
Journal of cleaner production 2020 v.263 pp. 121546
ISSN:
0959-6526
Subject:
perfluorooctanoic acid,   etc   ; anodes; bubbles; cleaning; electrochemistry; electron transfer; hydroxyl radicals; mineralization; oxidation; synergism; ultrasonics;     Show all 11 Subjects
Abstract:
... The mineralization of perfluorooctanoic acid (PFOA) was investigated in electrochemical oxidation process (EC) with the assistance of low frequency ultrasound (US). The electrochemical degradation of PFOA was enhanced under the synergic effects of Ti/SnO₂–Sb/Ce–PbO₂ anode and US (20 kHz and 52 W). The influences of PFOA initial concentrations on its degradation were studied in EC and US-EC systems ...
DOI:
10.1016/j.jclepro.2020.121546

7. Novel and legacy poly- and perfluoroalkyl substances (PFASs) in indoor dust from urban, industrial, and e-waste dismantling areas: The emergence of PFAS alternatives in China

Author:
Zhang, Bo; He, Yuan; Huang, Yingyan; Hong, Danhong; Yao, Yiming; Wang, Lei; Sun, Wenwen; Yang, Baoqin; Huang, Xiongfei; Song, Shiming; Bai, Xueyuan; Guo, Yuankai; Zhang, Tao; Sun, Hongwen
Source:
Environmental pollution 2020 v.263 pp. 114461
ISSN:
0269-7491
Subject:
perfluorooctanoic acid,   etc   ; dust; electronic wastes; fluorine; humans; perfluorocarbons; perfluorooctane sulfonic acid; sulfonates; China;     Show all 9 Subjects
Abstract:
... With the phase out of perfluorooctanesulfonate (PFOS) and perfluorooctanoic acid (PFOA), the composition profiles of poly- and perfluoroalkyl substance (PFAS) in our living environment are unclear. In this study, 25 PFASs were analyzed in indoor dust samples collected from urban, industrial, and e-waste dismantling areas in China. PFOS alternatives, including 6:2 chlorinated polyfluorinated ether ...
DOI:
10.1016/j.envpol.2020.114461

8. Persulfate-based degradation of perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS) in aqueous solution: Review on influences, mechanisms and prospective

Author:
Yang, Lie; He, Liuyang; Xue, Jianming; Ma, Yongfei; Xie, Zhiyong; Wu, Li; Huang, Min; Zhang, Zulin
Source:
Journal of hazardous materials 2020 v.393 pp. 122405
ISSN:
0304-3894
Subject:
perfluorooctanoic acid,   etc   ; aqueous solutions; chemical structure; durability; hydrogen peroxide; oxidation; perfluorooctane sulfonic acid; sulfonates; sulfonic acids;     Show all 9 Subjects
Abstract:
... Perfluorooctanoic acid (PFOA) and perfluorooctane sulfonic acid (PFOS) have attracted global attention due to their chemical durability, wide distribution, biotoxicity and bioaccumulative properties. Persulfate is a promising alternative to H₂O₂ for advanced oxidation processes and effective for organic removal. In this review, persulfate activation methods and operational factors in persulfate-ba ...
DOI:
10.1016/j.jhazmat.2020.122405

9. Exposure sources of perfluoroalkyl acids and influence of age and gender on concentrations of chlorinated polyfluorinated ether sulfonates in human serum from China

Author:
Jin, Hangbiao; Lin, Shu; Dai, Wei; Feng, Lingfang; Li, Tao; Lou, Jianlin; Zhang, Quan
Source:
Environment international 2020 v.138 pp. 105651
ISSN:
0160-4120
Subject:
perfluorooctanoic acid,   etc   ; blood serum; direct contact; females; humans; isomers; males; perfluorocarbons; perfluorooctane sulfonic acid; sulfonates; China;     Show all 11 Subjects
Abstract:
... The presence of perfluoroalkyl acids (PFAAs) and chlorinated polyfluoroalkyl ether sulfonates (Cl-PFAESs) in humans has attracted great attention in recent decades. However, information on their exposure sources and the influence of age and gender on Cl-PFAES concentrations in human serum is still limited. In this study, eighty-five serum samples were collected from the general population in Anji, ...
DOI:
10.1016/j.envint.2020.105651

10. Thermo-responsive adsorption-desorption of perfluoroorganics from water using PNIPAm hydrogels and pore functionalized membranes

Author:
Saad, Anthony; Mills, Rollie; Wan, Hongyi; Mottaleb, M. Abdul; Ormsbee, Lindell; Bhattacharyya, Dibakar
Source:
Journal of membrane science 2020 v.599 pp. 117821
ISSN:
0376-7388
Subject:
perfluorooctanoic acid,   etc   ; adsorbents; adsorption; artificial membranes; desorption; hydrogels; hydrophilicity; hydrophobicity; moieties; perfluorocarbons; temperature; thermoplastics;     Show all 12 Subjects
Abstract:
... Perfluorochemicals (PFCs) are emerging contaminants in various water sources. Responsive polymers provide a new avenue for PFC adsorption/desorption from water. Poly-N-isopropylacrylamide's (PNIPAm's) temperature-responsive behavior and hydrophilic/hydrophobic transition is leveraged for reversible adsorption and desorption of PFCs. Adsorption of PFOA (perfluoro-octanoic acid) onto PNIPAm hydrogel ...
DOI:
10.1016/j.memsci.2020.117821
PubMed:
32095035
PubMed Central:
PMC7039651

11. Accumulation and phytotoxicity of perfluorooctanoic acid and 2,3,3,3-tetrafluoro-2-(heptafluoropropoxy)propanoate in Arabidopsis thaliana and Nicotiana benthamiana

Author:
Chen, Chih-Hung; Yang, Shih-Hung; Liu, Yina; Jamieson, Pierce; Shan, Libo; Chu, Kung-Hui
Source:
Environmental pollution 2020 v.259 pp. 113817
ISSN:
0269-7491
Subject:
perfluorooctanoic acid,   etc   ; Arabidopsis thaliana; Nicotiana benthamiana; oxidative stress; photosynthesis; phytotoxicity; plant growth;     Show all 7 Subjects
Abstract:
... 2,3,3,3-Tetrafluoro-2-(heptafluoropropoxy)propanoate (known as GenX) has been used as an alternative to perfluorooctanoic acid (PFOA) which was phased out of formulations for industrial and consumer product applications in 2015. While the effects of GenX on lab animals have been studied, little is known about its effects on plants. This study examined and compared the accumulation and toxicity of ...
DOI:
10.1016/j.envpol.2019.113817

12. Dietary Uptake and Depuration Kinetics of Perfluorooctane Sulfonate, Perfluorooctanoic Acid, and Hexafluoropropylene Oxide Dimer Acid (GenX) in a Benthic Fish

Author:
Hassell, Kathryn L.; Coggan, Timothy L.; Cresswell, Tom; Kolobaric, Adam; Berry, Kathryn; Crosbie, Nicholas D.; Blackbeard, Judy; Pettigrove, Vincent J.; Clarke, Bradley O.
Source:
Environmental toxicology and chemistry 2020 v.39 no.3 pp. 595-603
ISSN:
0730-7268
Subject:
perfluorooctanoic acid,   etc   ; benthic organisms; bioaccumulation; depuration; fish; perfluorooctane sulfonic acid; sulfonates;     Show all 7 Subjects
Abstract:
... Per‐ and poly‐fluoroalkyl substances (PFAS) are ubiquitously distributed throughout aquatic environments and can bioaccumulate in organisms. We examined dietary uptake and depuration of a mixture of 3 PFAS: perfluorooctanoic acid (PFOA; C₈HF₁₅O₂), perfluorooctane sulfonate (PFOS; C₈HF₁₇SO₃), and hexafluoropropylene oxide dimer acid (HPFO‐DA; C₆HF₁₁O₃; trade name GenX). Benthic fish (blue spot gobi ...
DOI:
10.1002/etc.4640

13. Nanosecond Pulsed Dielectric Barrier Discharge Ionization Mass Spectrometry

Author:
Ahmed, Ezaz; Xiao, Dan; Dumlao, Morphy C.; Steel, Christopher C.; Schmidtke, Leigh M.; Fletcher, John; Donald, William A.
Source:
Analytical chemistry 2020 v.92 no.6 pp. 4468-4474
ISSN:
1520-6882
Subject:
perfluorooctanoic acid,   etc   ; blood plasma; detection limit; electrospray ionization mass spectrometry; humans; ionization; ions; phosphonates; temperature; thermometers;     Show all 10 Subjects
Abstract:
... Dielectric barrier discharge ionization (DBDI) is an emerging technique for ionizing volatile molecules directly from complex mixtures for sensitive detection by mass spectrometry (MS). In conventional DBDI, a high frequency and high voltage waveform with pulse widths of ∼50 μs (and ∼50 μs between pulses) is applied across a dielectric barrier and a gas to generate “low temperature plasma.” Althou ...
DOI:
10.1021/acs.analchem.9b05491

14. Fluoropolymer Nanoparticles Prepared Using Trifluoropropene Telomer Based Fluorosurfactants

Author:
Ma, Wei; Lopez, Gérald; Ameduri, Bruno; Takahara, Atsushi
Source:
Langmuir 2020 v.36 no.7 pp. 1754-1760
ISSN:
1520-5827
Subject:
perfluorooctanoic acid,   etc   ; adsorption; dialysis; emulsions; evaporation; hydrophobic bonding; iodine; nanoparticles; oils; solvents; surfactants;     Show all 11 Subjects
Abstract:
... A fluorosurfactant based on 3,3,3-trifluoropropene (TFP) telomer was synthesized as an environmentally friendly alternative to perfluorooctanoic acid (PFOA) using TFP and 2-iodoperfluoropropane ((CF₃)₂CF–I) as starting materials. TFP telomerization was initiated by addition of di-tert-butylperoxide in the presence of (CF₃)₂CF–I as a chain transfer agent. The surfactant was obtained by modification ...
DOI:
10.1021/acs.langmuir.9b03914

15. Contamination profiles and risk assessment of per- and polyfluoroalkyl substances in groundwater in China

Author:
Qiao, Xiaocui; Jiao, Lixin; Zhang, Xiaoxia; Li, Xue; Hao, Shuran; Kong, Minghao; Liu, Yan
Source:
Environmental monitoring and assessment 2020 v.192 no.2 pp. 76
ISSN:
0167-6369
Subject:
perfluorooctanoic acid,   etc   ; atmospheric deposition; ecosystems; groundwater; human health; perfluorooctane sulfonic acid; risk; risk assessment; sulfonates; China;     Show all 10 Subjects
Abstract:
... Per- and polyfluoroalkyl substances (PFASs) have attracted attention due to the potential risk they pose to ecosystems and human health. A total of 169 groundwater samples were collected from four representative regions in order to analyze PFASs concentrations in China. The total concentration of PFASs (∑PFASs) in groundwater ranged from 0.05 to 198.80 ng L⁻¹, with an average of 3.97 ng L⁻¹. All t ...
DOI:
10.1007/s10661-019-8005-z

16. Environment occurrence of perfluoroalkyl acids and associated human health risks near a major fluorochemical manufacturing park in southwest of China

Author:
Fang, Shuhong; Sha, Bo; Yin, Hongling; Bian, Yuxia; Yuan, Bo; Cousins, Ian T.
Source:
Journal of hazardous materials 2020 v.396 pp. 122617
ISSN:
0304-3894
Subject:
perfluorooctanoic acid,   etc   ; United States Environmental Protection Agency; electrochemistry; human health; isomers; leaves; manufacturing; risk; river water; soil; tap water; China;     Show all 12 Subjects
Abstract:
... Despite China being the largest global manufacturer of perfluoroalkyl acids (PFAAs), few studies have been carried out on the environmental occurrence and associated human health risks of PFAAs emitted from manufacturing sites in China. Here, river water, tap water, soil and leaf samples were collected around a major fluorochemical manufacturing park (FMP) in the southwest of China in 2019. High Σ ...
DOI:
10.1016/j.jhazmat.2020.122617

17. Selective and sensitive analysis by reactive easy ambient sonic-spray ionization: Synergistic combination of non-polar spray solvent and dicationic ionic liquid

Author:
Lv, Yueguang; Bai, Hua; He, Yujian; Yang, Jingkui; Ma, Qiang
Source:
Talanta 2020 v.215 pp. 120929
ISSN:
0039-9140
Subject:
perfluorooctanoic acid,   etc   ; detection limit; fabrics; hydrophobicity; ionic liquids; ionization; mass spectrometry; methylene chloride; perfluorocarbons; perfluorooctane sulfonic acid; popcorn; sulfonic acids;     Show all 12 Subjects
Abstract:
... The present study reports the first conception to incorporate a non-polar solvent, dichloromethane, as the spray solution in easy ambient sonic-spray ionization (EASI) for mass spectrometry (MS) analysis of hydrophobic compounds. An imidazolium-based dicationic ionic liquid (DIL) at a low concentration of 20 μM was used in combination with dichloromethane. A reactive EASI strategy was implemented, ...
DOI:
10.1016/j.talanta.2020.120929

18. Combined effects and toxicological interactions of perfluoroalkyl and polyfluoroalkyl substances mixtures in human liver cells (HepG2)

Author:
Ojo, Atinuke F.; Peng, Cheng; Ng, Jack C.
Source:
Environmental pollution 2020 v.263 pp. 114182
ISSN:
0269-7491
Subject:
perfluorooctanoic acid,   etc   ; carbon; cytotoxicity; equations; health effects assessments; hepatocytes; humans; perfluorohexane sulfonic acid; perfluorooctane sulfonic acid; synergism; toxicology;     Show all 11 Subjects
Abstract:
... The combined effects and toxicological interactions of perfluoroalkyl and polyfluoroalkyl substances (PFAS) mixtures remain largely unknown even though they occur as complex mixtures in the environment. This study investigated the toxicity of individual and combined PFAS to human liver cell line (HepG2). The Combination Index (CI)-isobologram equation method was used to determine the toxicological ...
DOI:
10.1016/j.envpol.2020.114182

19. Emerging and legacy per- and polyfluoroalkyl substances in water, sediment, and air of the Bohai Sea and its surrounding rivers

Author:
Zhao, Zhen; Cheng, Xianghui; Hua, Xia; Jiang, Bin; Tian, Chongguo; Tang, Jianhui; Li, Qilu; Sun, Hongwen; Lin, Tian; Liao, Yuhong; Zhang, Gan
Source:
Environmental pollution 2020 v.263 pp. 114391
ISSN:
0269-7491
Subject:
perfluorooctanoic acid,   etc   ; alcohols; ecotoxicology; estuaries; mass spectrometry; river water; rivers; seawater; sediments; sulfonates; surface water; Yellow Sea;     Show all 12 Subjects
Abstract:
... Per- and polyfluoroalkyl substances (PFASs) contamination in the Bohai Sea and its surrounding rivers has attracted considerable attention in recent years. However, few studies have been conducted regarding the distribution of PFASs in multiple environmental media and their distributions between the suspended particles and dissolved phases. In this study, surface water, surface sediment, and air s ...
DOI:
10.1016/j.envpol.2020.114391

20. Neurotoxicity of perfluorooctanoic acid and post-exposure recovery due to blueberry anthocyanins in the planarians Dugesia japonica

Author:
Zhang, Jianyong; Shao, Xinxin; Zhao, Baoying; Zhai, Liming; Liu, Na; Gong, Fangbin; Ma, Xue; Pan, Xiaolu; Zhao, Bosheng; Yuan, Zuoqing; Zhang, Xiufang
Source:
Environmental pollution 2020 v.263 pp. 114471
ISSN:
0269-7491
Subject:
perfluorooctanoic acid,   etc   ; DNA damage; Dugesia; acetylcholinesterase; anthocyanins; blueberries; comet assay; ecosystems; enzyme activity; locomotion; neurons; neurotoxicity; neurotoxins; neurotransmitters;     Show all 14 Subjects
Abstract:
... Perfluorooctanoic acid (PFOA) is a widely used synthetic industrial chemical which accumulates in ecosystems and organisms. Our study have investigated the neurobehavioral effects of PFOA and the alleviation effects of PFOA-induced neurotoxicity by blueberry anthocyanins (ANT) in Dugesia japonica. The planarians were exposed to PFOA and ANT for ten days. Researchs showed that exposure to PFOA affe ...
DOI:
10.1016/j.envpol.2020.114471