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Jiao J, Li T, Zhang G, Xiong J, Lang X, Quan X, Cheng Y, Wei Y. Molecular Dynamics Simulations of the Short-Chain Fluorocarbon Surfactant PFH XA and the Anionic Surfactant SDS at the Air/Water Interface. Molecules 2024; 29:1606. [PMID: 38611886 PMCID: PMC11013209 DOI: 10.3390/molecules29071606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Revised: 03/19/2024] [Accepted: 03/31/2024] [Indexed: 04/14/2024] Open
Abstract
The research and development of alternatives to long-chain fluorocarbon surfactants are desperately needed because they are extremely toxic, difficult to break down, seriously harm the environment, and limit the use of conventional aqueous film-forming foam fire extinguishing agents. In this study, mixed surfactant systems containing the short-chain fluorocarbon surfactant perfluorohexanoic acid (PFHXA) and the hydrocarbon surfactant sodium dodecyl sulfate (SDS) were investigated by molecular dynamics simulation to investigate the microscopic properties at the air/water interface at different molar ratios. Some representative parameters, such as surface tension, degree of order, density distribution, radial distribution function, number of hydrogen bonds, and solvent-accessible surface area, were calculated. Molecular dynamics simulations show that compared with a single type of surfactant, mixtures of surfactants provide superior performance in improving the interfacial properties of the gas-liquid interface. A dense monolayer film is formed by the strong synergistic impact of the two surfactants. Compared to the pure SDS system, the addition of PFHXA caused SDS to be more vertically oriented at the air/water interface with a reduced tilt angle, and a more ordered structure of the mixed surfactants was observed. Hydrogen bonding between SDS headgroups and water molecules is enhanced with the increasing PFHXA. The surface activity is arranged in the following order: PFHXA/SDS = 1:1 > PFHXA/SDS = 3:1 > PFHXA/SDS = 1:3. These results indicate that a degree of synergistic relationship exists between PFHXA and SDS at the air/water interface.
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Affiliation(s)
- Jinqing Jiao
- State Key Laboratory of Chemical Safety, SINOPEC Research Institute of Safety Engineering Co., Ltd., Qingdao 266071, China; (G.Z.); (X.L.); (Y.C.)
| | - Tao Li
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum (Beijing), Beijing 102249, China; (T.L.); (J.X.); (X.Q.)
| | - Guangwen Zhang
- State Key Laboratory of Chemical Safety, SINOPEC Research Institute of Safety Engineering Co., Ltd., Qingdao 266071, China; (G.Z.); (X.L.); (Y.C.)
| | - Jing Xiong
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum (Beijing), Beijing 102249, China; (T.L.); (J.X.); (X.Q.)
| | - Xuqing Lang
- State Key Laboratory of Chemical Safety, SINOPEC Research Institute of Safety Engineering Co., Ltd., Qingdao 266071, China; (G.Z.); (X.L.); (Y.C.)
| | - Xiaolong Quan
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum (Beijing), Beijing 102249, China; (T.L.); (J.X.); (X.Q.)
| | - Yiwei Cheng
- State Key Laboratory of Chemical Safety, SINOPEC Research Institute of Safety Engineering Co., Ltd., Qingdao 266071, China; (G.Z.); (X.L.); (Y.C.)
| | - Yuechang Wei
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum (Beijing), Beijing 102249, China; (T.L.); (J.X.); (X.Q.)
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Yu X, Yu X, Lin Y, Li H, Li G, Zong R. Comparative Study on Interfacial Properties, Foam Stability, and Firefighting Performance of C6 Fluorocarbon Surfactants with Different Hydrophilic Groups. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:16336-16348. [PMID: 37948692 DOI: 10.1021/acs.langmuir.3c01980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2023]
Abstract
Liquid fuel is flammable and hazardous, and a pool fire is one of the most serious disasters. Therefore, it is important to develop high-performance firefighting agents. To synthesize aqueous film-forming foam (AFFF) formulations, two C6 short-chain fluorocarbon surfactants Capstone 1157 (FC1157) and sodium perfluorohexylethyl sulfonate (SF852) with different hydrophilic groups were introduced, and three hydrocarbon surfactants sodium dodecyl sulfate (SDS), decyl glucoside (APG0810), and coco glucoside (APG0814) were chosen. The AFFF formulations based on the short-chain fluorocarbon-hydrocarbon compounding system were developed, and the firefighting performance of the formulations was assessed according to the standard pool fire extinction test. The results indicated that amphoteric FC1157 was slightly more effective than anionic SF852 in extinguishing small-scale pool fires and could reduce heat flux more effectively than SF852. Fluorocarbon surfactant FC1157 has been shown to suppress large pool fires much better than SF852, possibly due to its higher foam stability, higher foaming property, lower dynamic surface tension, and lower bubble coarsening rate. Both formulations we studied were more effective than commercial AFFF formulations. A concentration of 0.1-0.3% of FC1157 in an AFFF solution was optimal for extinguishing high-boiling-point oil fires.
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Affiliation(s)
- Xiao Yu
- State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, China
- Suzhou Key Laboratory of Urban Public Safety, Suzhou Institute for Advanced Research, University of Science and Technology of China, Suzhou, Jiangsu 215123, China
| | - Xiaoyang Yu
- State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, China
- Suzhou Key Laboratory of Urban Public Safety, Suzhou Institute for Advanced Research, University of Science and Technology of China, Suzhou, Jiangsu 215123, China
| | - Yunru Lin
- State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, China
- Suzhou Key Laboratory of Urban Public Safety, Suzhou Institute for Advanced Research, University of Science and Technology of China, Suzhou, Jiangsu 215123, China
| | - Huan Li
- State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, China
| | - Guangying Li
- State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, China
- Suzhou Key Laboratory of Urban Public Safety, Suzhou Institute for Advanced Research, University of Science and Technology of China, Suzhou, Jiangsu 215123, China
| | - Ruowen Zong
- State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, China
- Suzhou Key Laboratory of Urban Public Safety, Suzhou Institute for Advanced Research, University of Science and Technology of China, Suzhou, Jiangsu 215123, China
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Brusseau ML. QSPR-based prediction of air-water interfacial adsorption coefficients for nonionic PFAS with large headgroups. CHEMOSPHERE 2023; 340:139960. [PMID: 37633613 DOI: 10.1016/j.chemosphere.2023.139960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 08/15/2023] [Accepted: 08/23/2023] [Indexed: 08/28/2023]
Abstract
Air-water interfacial adsorption has been demonstrated to be an important process affecting the retention and distribution of PFAS in soil, surface waters, and the atmosphere, as well as being central to certain remediation methods. Measured or estimated air-water interfacial adsorption coefficients are needed for quantifying and modeling the interfacial adsorption of PFAS. A single-descriptor QSPR model developed in prior work for predicting air-water interfacial adsorption coefficients of PFAS was demonstrated to successfully represent more than 60 different PFAS, comprising all headgroup types and a wide variety of tail structures. However, the model overpredicted values for nonionic PFAS with very large headgroups. A revised QSPR model was developed in the present study to predict air-water interfacial adsorption coefficients for nonionic PFAS with large headgroups. A two-descriptor QSPR model employing molar volume and headgroup-to-tail molar-volume ratio successfully represented measured data for both nonionic PFAS and nonionic hydrocarbon surfactants. This new model provides a means to produce estimates of air-water interfacial adsorption coefficients for nonionic PFAS for which measured values are typically not available.
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Affiliation(s)
- Mark L Brusseau
- Environmental Science Department, University of Arizona, Tucson, AZ, 85710, USA.
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4
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Guo S, Guo Y, Huang M, Qian L, Su Z, Chen QY, Wu C, Liu C. Synthesis, Surface Activity, and Foamability of Two Short-Chain Fluorinated Sulfonate Surfactants with Ether Bonds. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:14519-14527. [PMID: 37802506 DOI: 10.1021/acs.langmuir.3c01623] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/10/2023]
Abstract
Fluorinated surfactants are widely used in many fields because of their excellent surface active properties, but their high stability has caused many environmental problems. With the ban and restriction of classical long-chain fluorinated surfactants such as perfluorooctanesulfonic acid (PFOS) and perfluorooctanoic acid (PFOA) worldwide, the development and replacement of their alternatives is now a major challenge. How to reduce environmental persistence, bioaccumulation, and biotoxicity while maintaining high surface activity has become an important issue in the development of fluorinated surfactants. Using short-chain fluorinated surfactants is one of the important solutions to resolve the pollution of organic fluorinated compounds. In this article, we synthesized two short-chain fluorinated surfactants with ether bonds. One of them 6:2 FTESNa (2) used the perfluoroalkyl chain (n-C6F13-) and the other C72 FEESNa (4) used the fluoroether segment with six fluorinated carbons and two oxygens (CF3OCF(CF3)CF2OCF(CF3)). The surface activity, foam performance, and wettability of the two molecules were measured. The surface tensions at critical micelle concentration (γcmc) and the critical micelle concentration (cmc) of 2 and 4 were 17.6 mN/m (2.2 g/L) and 20.2 mN/m (4.6 g/L), respectively. Both of them were significantly superior to the surface activity of 6:2 FTSNa (7) which is one of the current alternatives for PFOS. Additionally, the foamability and foam stability of both 2 and 4 were better than that of 7. In the aspect of wettability on PTFE, that of 4 was greater than those of 2 and 7. In summary, this work provided a new choice for alternatives of PFOS and PFOA.
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Affiliation(s)
- Shanwei Guo
- School of Chemical and Environment Engineering, Shanghai Institute of Technology, Shanghai 201418, China
| | - Yong Guo
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Meiwei Huang
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
| | - Libo Qian
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhaoben Su
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
| | - Qing-Yun Chen
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Chengying Wu
- Sanming Hexafluo Chemicals Company, Ltd., Fluorinated New Material Industry Park, Mingxi, Sanming, Fujian 365200, China
| | - Chao Liu
- School of Chemical and Environment Engineering, Shanghai Institute of Technology, Shanghai 201418, China
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5
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Zeng G, Zhong C, Wang X, He X, Pu E. Micellization Thermodynamics, Interfacial Behavior, Salt-resistance and Wettability Alteration of Gemini Hybrid Fluorinated Surfactant. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.130859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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6
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Yu X, Qiu K, Yu X, Li Q, Zong R, Lu S. Stability and thinning behaviour of aqueous foam films containing fluorocarbon and hydrocarbon surfactant mixtures. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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7
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Garrido PF, Bastos M, Velázquez-Campoy A, Amigo A, Dumas P, Piñeiro Á. Unsupervised bubble calorimetry analysis: Surface tension from isothermal titration calorimetry. J Colloid Interface Sci 2022; 606:1823-1832. [PMID: 34507173 DOI: 10.1016/j.jcis.2021.08.115] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Revised: 08/13/2021] [Accepted: 08/14/2021] [Indexed: 11/18/2022]
Abstract
HYPOTHESIS The injection of air into the sample cell of an isothermal titration calorimeter containing a liquid provides a rich-in-information signal, with a periodic contribution arising from the creation, growing and release of bubbles. The identification and analysis of such contributions allow the accurate determination of the surface tension of the target liquid. EXPERIMENTS Air is introduced at a constant rate into the sample cell of the calorimeter containing either a pure liquid or a solution. The resulting calorimetric signal is analyzed by a new algorithm, which is implemented into a computational code. FINDINGS The thermal power generated by our experiments is often noisy, thus hiding the periodic signal arising from the bubbles' formation and release. The new algorithm was tested with a range of different types of calorimetric raw data, some of them apparently being just noise. In all cases, the contribution of the bubbles to the signal was isolated and the corresponding period was successfully determined in an automated way. It is also shown that two reference measurements suffice to calibrate the instrument at a given temperature, regardless the injection rate, allowing the direct determination of surface tension values for the liquid contained in the sample cell.
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Affiliation(s)
- Pablo F Garrido
- Departamento de Fisica de Aplicada, Facultade de Fisica, Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain.
| | - Margarida Bastos
- CIQ-UP, Departamento de Quimica e Bioquimica, Faculdade de Ciencias da Universidade do Porto, R. Campo Alegre 687, P-4169-007 Porto, Portugal
| | - Adrián Velázquez-Campoy
- Institute of Biocomputation and Physics of Complex Systems (BIFI), Joint Units IQFR-CSIC-BIFI, and GBsC-CSIC-BIFI, Universidad de Zaragoza, Zaragoza 50018, Spain; Department of Biochemistry and Molecular and Cell Biology, Universidad de Zaragoza, 50009 Zaragoza, Spain; Aragon Institute for Health Research (IIS Aragon), 50009 Zaragoza, Spain; Biomedical Research Networking Centre for Liver and Digestive Diseases (CIBERehd), 28029 Madrid, Spain; Fundacion ARAID, Government of Aragon, 50018 Zaragoza, Spain
| | - Alfredo Amigo
- Departamento de Fisica de Aplicada, Facultade de Fisica, Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain
| | - Philippe Dumas
- IGBMC, Dept of Integrative Biology, Strasbourg University, F67404 Illkirch CEDEX, France
| | - Ángel Piñeiro
- Departamento de Fisica de Aplicada, Facultade de Fisica, Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain.
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8
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Yu X, Li F, Wang J, Lin Y, Zong R, Lu S. Effects of Fe (II) on stability of aqueous foam prepared by hydrolyzed rice protein in the presence of oil. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.117666] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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9
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Wang J, Niven RK. Unification of surface tension isotherms of PFOA or GenX salts in electrolyte solutions by mean ionic activity. CHEMOSPHERE 2021; 280:130715. [PMID: 33965869 DOI: 10.1016/j.chemosphere.2021.130715] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 04/18/2021] [Accepted: 04/24/2021] [Indexed: 06/12/2023]
Abstract
The surface tension isotherms of soluble salts of per- and polyfluoroalkyl substances (PFAS) in electrolyte solutions are typically reported as functions of the PFAS concentration. However, for univalent salts and electrolytes, the Langmuir-Szyszkowski equation is a function of the mean ionic activity a*. Using previously reported data, we show that for salts of perfluorooctanoic acid (PFOA) or hexafluoropropylene oxide dimer acid (GenX™), use of a* rather than concentration provides a unified surface tension isotherm, independent of the electrolyte concentration. This suggests that the electrolyte dependence of the isotherm arises purely from its effect on PFAS activity, rather than an intrinsic surface property. This finding has important implications for the understanding of PFAS retention in saline unsaturated soils, and for PFAS extraction from saline waters by foam fractionation.
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Affiliation(s)
- Jianlong Wang
- School of Engineering and Information Technology, University of New South Wales, Northcott Drive, Canberra, ACT, 2610, Australia.
| | - Robert K Niven
- School of Engineering and Information Technology, University of New South Wales, Northcott Drive, Canberra, ACT, 2610, Australia.
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10
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Brusseau ML, Van Glubt S. The influence of molecular structure on PFAS adsorption at air-water interfaces in electrolyte solutions. CHEMOSPHERE 2021; 281:130829. [PMID: 33992851 PMCID: PMC8544795 DOI: 10.1016/j.chemosphere.2021.130829] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 05/04/2021] [Accepted: 05/05/2021] [Indexed: 05/19/2023]
Abstract
Fluid-fluid interfacial adsorption has been demonstrated to be an important retention process for per and polyfluoroalkyl substances (PFAS) in porous media with air or non-aqueous phase liquids (NAPLs) present. The objective of this study was to characterize the influence of PFAS molecular structure on air-water interfacial adsorption in electrolyte solutions. Measured and literature-reported surface-tension data sets were aggregated to generate the largest compilation of interfacial adsorption coefficients measured in aqueous solutions comprising environmentally representative ionic strengths. The surface activities and interfacial adsorption coefficients (Ki) exhibited chain length trends, with greater surface activities and larger Ki values corresponding to longer chain length. The impact of multiple-component PFAS solutions on the surface activity of a select PFAS was a function of the respective surface activities and concentrations. Quantitative structure-property relationship analysis (QSPR) employing a single molecular descriptor (molar volume) was used successfully to characterize the impact of PFAS molecular structure on air-water interfacial adsorption. A previously reported QSPR model based on PFAS data generated for deionized-water solutions was updated to include more than 60 different PFAS, comprising all head-group types and a wide variety of tail structures. The QSPR model developed for PFAS in electrolyte solution compared favorably to the model developed for deionized water. Additionally, the magnitude of ionic strength for non-zero ionic strength systems was determined to have relatively minimal impact on interfacial adsorption coefficients. The new QSPR model is therefore anticipated to be representative for a wide variety of PFAS and for a wide range of ionic compositions.
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Affiliation(s)
- Mark L Brusseau
- Environmental Science Department, University of Arizona, Tucson, AZ, 85721, United States.
| | - Sarah Van Glubt
- Environmental Science Department, University of Arizona, Tucson, AZ, 85721, United States
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11
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Ji Y, Yan N, Brusseau ML, Guo B, Zheng X, Dai M, Liu H. Impact of a Hydrocarbon Surfactant on the Retention and Transport of Perfluorooctanoic Acid in Saturated and Unsaturated Porous Media. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:10480-10490. [PMID: 34288652 PMCID: PMC8634892 DOI: 10.1021/acs.est.1c01919] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
The transport and retention behavior of perfluorooctanoic acid (PFOA) in the presence of a hydrocarbon surfactant under saturated and unsaturated conditions was investigated. Miscible-displacement transport experiments were conducted at different PFOA and sodium dodecyl sulfate (SDS) input ratios to determine the impact of SDS on PFOA adsorption at solid-water and air-water interfaces. A numerical flow and transport model was employed to simulate the experiments. The PFOA breakthrough curves for unsaturated conditions exhibited greater retardation compared to those for saturated conditions in all cases, owing to air-water interfacial adsorption. The retardation factor for PFOA with a low concentration of SDS (PFOA-SDS ratio of 10:1) was similar to that for PFOA without SDS under unsaturated conditions. Conversely, retardation was greater in the presence of higher levels of SDS (1:1 and 1:10) with retardation factors increasing from 2.4 to 2.9 and 3.6 under unsaturated conditions due to enhanced adsorption at the solid-water and air-water interfaces. The low concentration of SDS had no measurable impact on PFOA air-water interfacial adsorption coefficients (Kia) determined from the transport experiments. The presence of SDS at the higher PFOA-SDS concentration ratios increased the surface activity of PFOA, with transport-determined Kia values increased by 27 and 139%, respectively. The model provided very good independently predicted simulations of the measured breakthrough curves and showed that PFOA and SDS experienced various degrees of differential transport during the experiments. These results have implications for the characterization and modeling of poly-fluoroalkyl substances (PFAS) migration potential at sites wherein PFAS and hydrocarbon surfactants co-occur.
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Affiliation(s)
- Yifan Ji
- Key Lab of Marine Environmental Science and Ecology, Ministry of Education, College of Environmental Science and Engineering, Ocean University of China, Qingdao, 266100, P.R. China
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Ni Yan
- Key Lab of Marine Environmental Science and Ecology, Ministry of Education, College of Environmental Science and Engineering, Ocean University of China, Qingdao, 266100, P.R. China
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
- Corresponding author
| | - Mark L. Brusseau
- Environmental Science Department, University of Arizona, Tucson, AZ 85721, United States
- DepartmentDepartment of Hydrology and Atmospheric Sciences, University of Arizona, Tucson, AZ 85721, United States
- Corresponding author
| | - Bo Guo
- DepartmentDepartment of Hydrology and Atmospheric Sciences, University of Arizona, Tucson, AZ 85721, United States
| | - Xilai Zheng
- Key Lab of Marine Environmental Science and Ecology, Ministry of Education, College of Environmental Science and Engineering, Ocean University of China, Qingdao, 266100, P.R. China
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Mengfan Dai
- Key Lab of Marine Environmental Science and Ecology, Ministry of Education, College of Environmental Science and Engineering, Ocean University of China, Qingdao, 266100, P.R. China
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Hejie Liu
- Key Lab of Marine Environmental Science and Ecology, Ministry of Education, College of Environmental Science and Engineering, Ocean University of China, Qingdao, 266100, P.R. China
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
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12
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Molecular self-assemblies in water and brine and solution properties for a hybrid fluorocarbon surfactant. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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13
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Liu D, Wang J, Zhou G, Jiang W, Duan J, Tian F, Xu H. Synthesis and Performance Analysis of New Hybrid Polymer Gel Based on Carboxymethyl Cellulose for Preventing Spontaneous Coal Combustion. ChemistrySelect 2021. [DOI: 10.1002/slct.202100766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Dong Liu
- College of Safety and Environmental Engineering Shandong University of Science and Technology Qingdao 266590 China
- State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology Shandong University of Science and Technology Qingdao 266590 China
| | - Junpeng Wang
- College of Safety and Environmental Engineering Shandong University of Science and Technology Qingdao 266590 China
- State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology Shandong University of Science and Technology Qingdao 266590 China
| | - Gang Zhou
- College of Safety and Environmental Engineering Shandong University of Science and Technology Qingdao 266590 China
- State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology Shandong University of Science and Technology Qingdao 266590 China
| | - Wenjing Jiang
- College of Safety and Environmental Engineering Shandong University of Science and Technology Qingdao 266590 China
- State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology Shandong University of Science and Technology Qingdao 266590 China
| | - Jinjie Duan
- College of Safety and Environmental Engineering Shandong University of Science and Technology Qingdao 266590 China
- State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology Shandong University of Science and Technology Qingdao 266590 China
| | - Fuchao Tian
- State Key Laboratory of Coal Mine Safety Technology China Coal Technology and Engineering Group Shenyang Research Institute Fushun 113122 China
| | - Hongze Xu
- Gaozhuang Coal Industry Limited Company Shandong Energy Zaozhuang Mining Group Weishan 277605 China
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14
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Sharifan H, Bagheri M, Wang D, Burken JG, Higgins CP, Liang Y, Liu J, Schaefer CE, Blotevogel J. Fate and transport of per- and polyfluoroalkyl substances (PFASs) in the vadose zone. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 771:145427. [PMID: 33736164 DOI: 10.1016/j.scitotenv.2021.145427] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 01/19/2021] [Accepted: 01/21/2021] [Indexed: 05/06/2023]
Abstract
Per- and polyfluoroalkyl substances (PFASs) are a heterogeneous group of persistent organic pollutants that have been detected in various environmental compartments around the globe. Emerging research has revealed the preferential accumulation of PFASs in shallow soil horizons, particularly at sites impacted by firefighting activities, agricultural applications, and atmospheric deposition. Once in the vadose zone, PFASs can sorb to soil, accumulate at interfaces, become volatilized, be taken up in biota, or leach to the underlying aquifer. At the same time, polyfluorinated precursor species may transform into highly recalcitrant perfluoroalkyl acids, changing their chemical identity and thus transport behavior along the way. In this review, we critically discuss the current state of the knowledge and aim to interconnect the complex processes that control the fate and transport of PFASs in the vadose zone. Furthermore, we identify key challenges and future research needs. Consequently, this review may serve as an interdisciplinary guide for the risk assessment and management of PFAS-contaminated sites.
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Affiliation(s)
- Hamidreza Sharifan
- Department of Civil and Environmental Engineering, Colorado State University, Fort Collins, CO 80523, USA
| | - Majid Bagheri
- Civil, Architectural and Environmental Engineering Department, Missouri University of Science and Technology, Rolla, MO, USA
| | - Dan Wang
- Department of Civil Engineering, McGill University, Montreal, Quebec H3A 0C3, Canada
| | - Joel G Burken
- Civil, Architectural and Environmental Engineering Department, Missouri University of Science and Technology, Rolla, MO, USA
| | - Christopher P Higgins
- Department of Civil and Environmental Engineering, Colorado School of Mines, Golden, CO 80401, USA
| | - Yanna Liang
- Department of Environmental and Sustainable Engineering, University at Albany, SUNY, Albany, NY 12222, USA
| | - Jinxia Liu
- Department of Civil Engineering, McGill University, Montreal, Quebec H3A 0C3, Canada
| | | | - Jens Blotevogel
- Department of Civil and Environmental Engineering, Colorado State University, Fort Collins, CO 80523, USA.
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Foaming behavior of fluorocarbon surfactant used in fire-fighting: The importance of viscosity and self-assembly structure. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.114811] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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16
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Brusseau ML. Examining the robustness and concentration dependency of PFAS air-water and NAPL-water interfacial adsorption coefficients. WATER RESEARCH 2021; 190:116778. [PMID: 33387950 PMCID: PMC7856177 DOI: 10.1016/j.watres.2020.116778] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Revised: 12/17/2020] [Accepted: 12/21/2020] [Indexed: 05/19/2023]
Abstract
Determining robust values for the air-water or NAPL-water interfacial adsorption coefficient, KIA, is key to characterizing and modeling PFAS transport and fate in several environmental systems. Direct, high-resolution measurements of surfactant adsorption at the fluid-fluid interface were aggregated from the literature. This data set was used to examine the accuracy and applicability of Γ and KIA measurements determined for three PFAS from transport experiments and surface-tension data. The transport-measured Γ and KIA data were observed to be fully consistent with the directly-measured data. Specifically, Γ values for the two methods were entirely coincident in the region of overlapping concentrations, which spanned ~4 orders-of-magnitude. Furthermore, the two data sets adhered to an identical Γ-C profile. These results conclusively demonstrate the accuracy of the transport-measured values. Γ and KIA values determined from the application of the Gibbs adsorption equation to measured surface-tension data were fully consistent with the directly-measured and transport-measured data sets, demonstrating their applicability for representing PFAS transport in environmental systems. The directly-measured data were used to examine the concentration dependency of KIA values, absent the potential confounding effects associated with the use of surface-tension or transport-measured data. The directly-measured data clearly demonstrate that KIA attains a constant, maximum limit at lower concentrations. Two separate analyses of the transport-measured data both produced observations of constant KIA values at lower concentrations, consistent with the directly-measured data. These outcomes are discussed in terms of surface activities, relative surface coverages, and critical concentrations.
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Affiliation(s)
- Mark L Brusseau
- Environmental Science Department (Home) and Hydrology & Atmospheric Sciences Department (Joint), University of Arizona, Tucson, Arizona, United States.
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Costanza J, Abriola LM, Pennell KD. Aqueous Film-Forming Foams Exhibit Greater Interfacial Activity than PFOA, PFOS, or FOSA. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:13590-13597. [PMID: 32965107 DOI: 10.1021/acs.est.0c03117] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Perfluoroalkyl acids spontaneously concentrate at air-water and non-aqueous phase liquid (NAPL)-water interfaces, which can influence their retention during subsurface transport. This work presents measurements of air- and NAPL-water interfacial tension for synthetic groundwater containing perfluorooctanoic acid (PFOA), perfluorooctanesulfonic acid (PFOS), perfluorooctanesulfonamide (FOSA), or aqueous film-forming foam (AFFF) formulations at concentrations ranging from 0.1 to greater than 1000 mg/L. The NAPLs tested included dodecane, tetrachloroethylene, and jet fuel. AFFF formulations were less efficient at lowering interfacial tension than PFOA, FPOS, or FOSA substances below 100 mg/L, while above 100 mg/L, these formulations were more effective, achieving tensions of less than 3 mN/m. Infiltration of solutions with such low tension could lead to mobilization of residual NAPL. Equations based on interfacial tension measurements show that concentrations of PFOA, PFOS, and FOSA at the air-water interface were from 2 to 16 times greater than at the NAPL-water interface below 100 mg/L and were 10-50 times greater for AFFF below 20 mg/L. Calculations for unsaturated soil estimate that up to 87% of PFOS mass was at the air-water interface and less than 4% at the dodecane-water interface for bulk-water concentrations below 1 mg/L.
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Affiliation(s)
- Jed Costanza
- School of Engineering, Brown University, Providence, Rhode Island 02912, United States
| | - Linda M Abriola
- Department of Civil and Environmental Engineering, Tufts University, Medford, Massachusetts 02155, United States
| | - Kurt D Pennell
- School of Engineering, Brown University, Providence, Rhode Island 02912, United States
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Yu X, Li F, Miao X, Jiang N, Zong R, Lu S, Li C. Experimental investigation on the spread of aqueous foam over ethanol surface. Chin J Chem Eng 2020. [DOI: 10.1016/j.cjche.2020.07.028] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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19
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Yu X, Jiang N, Miao X, Zong R, Sheng Y, Li C, Lu S. Formation of stable aqueous foams on the ethanol layer: Synergistic stabilization of fluorosurfactant and polymers. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.124545] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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20
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Meng P, Jiang X, Wang B, Huang J, Wang Y, Yu G, Cousins IT, Deng S. Role of the air-water interface in removing perfluoroalkyl acids from drinking water by activated carbon treatment. JOURNAL OF HAZARDOUS MATERIALS 2020; 386:121981. [PMID: 31896003 DOI: 10.1016/j.jhazmat.2019.121981] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Revised: 12/16/2019] [Accepted: 12/25/2019] [Indexed: 06/10/2023]
Abstract
Contamination of drinking water by per- and polyfluoroalkyl substances (PFASs) is a worldwide problem. In this study, we for the first time revealed the role of the air-water interface in enhancing the removal of long-chain perfluoroalkyl carboxylic (PFCAs; CnF2n+1COOH, n ≥ 7) and perfluoroalkane sulfonic (PFSAs; CnF2n+1SO3H, n ≥ 6) acids, collectively termed as perfluoroalkyl acids (PFAAs), through combined aeration and adsorption on two kinds of activated carbon (AC). Aeration was shown to enhance the removal of long-chain PFAAs through adsorption at the air-water interface and subsequent adsorption of PFAA-enriched air bubbles to the AC. The removal of selected long-chain PFAAs was increased by 50-115 % with the assistance of aeration, depending on the perfluoroalkyl chain length. Aeration is more effective in enhancing long-chain PFAA removal as air-water interface adsorption increases with PFAA chain length due to higher surface activity. After removing adsorbed air bubbles by centrifugation, up to 80 % of the long-chain PFAAs were able to desorb from the sorbent, confirming the contribution of the air-water interface to the adsorption of PFAAs on AC. Aeration during AC treatment of water could enhance the removal of long-chain PFAAs, and improve the performance of AC during water treatment.
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Affiliation(s)
- Pingping Meng
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Beijing Key Laboratory for Emerging Organic Contaminants Control, School of Environment, Tsinghua University, Beijing, 100084, China; Department of Civil, Construction and Environmental Engineering, North Carolina State University, Raleigh, NC, 27695, United States
| | - Xiangzhe Jiang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Beijing Key Laboratory for Emerging Organic Contaminants Control, School of Environment, Tsinghua University, Beijing, 100084, China
| | - Bin Wang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Beijing Key Laboratory for Emerging Organic Contaminants Control, School of Environment, Tsinghua University, Beijing, 100084, China
| | - Jun Huang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Beijing Key Laboratory for Emerging Organic Contaminants Control, School of Environment, Tsinghua University, Beijing, 100084, China
| | - Yujue Wang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Beijing Key Laboratory for Emerging Organic Contaminants Control, School of Environment, Tsinghua University, Beijing, 100084, China
| | - Gang Yu
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Beijing Key Laboratory for Emerging Organic Contaminants Control, School of Environment, Tsinghua University, Beijing, 100084, China
| | - Ian T Cousins
- Department of Environmental Science and Analytical Chemistry (ACES), Stockholm University, SE-106 91, Stockholm, Sweden.
| | - Shubo Deng
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Beijing Key Laboratory for Emerging Organic Contaminants Control, School of Environment, Tsinghua University, Beijing, 100084, China.
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21
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CO2/N2 switchable aqueous foam stabilized by SDS/C12A surfactants: Experimental and molecular simulation studies. Chem Eng Sci 2019. [DOI: 10.1016/j.ces.2019.115218] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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22
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Giles SL, Snow AW, Hinnant KM, Ananth R. Modulation of fluorocarbon surfactant diffusion with diethylene glycol butyl ether for improved foam characteristics and fire suppression. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.123660] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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Brusseau ML, Van Glubt S. The influence of surfactant and solution composition on PFAS adsorption at fluid-fluid interfaces. WATER RESEARCH 2019; 161:17-26. [PMID: 31174056 PMCID: PMC7039257 DOI: 10.1016/j.watres.2019.05.095] [Citation(s) in RCA: 64] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Revised: 05/08/2019] [Accepted: 05/27/2019] [Indexed: 05/23/2023]
Abstract
The objective of this research is to examine the influence of surfactant and solution composition on PFAS adsorption at fluid-fluid interfaces. Surface tensions were measured for select PFAS, as well as a representative hydrocarbon surfactant. These data are supplemented with data sets collected from the literature. The influence of surfactant headgroup charge, specifically for zwitterionic PFAS, was investigated. The impacts of surfactant counterion for ionic PFAS and the influence of headgroup size for nonionic PFAS were also investigated. In addition, the influence of solution ion composition, ionic strength, and pH was examined. The impact of co-solutes, specifically ethanol, humic acid, and trichloroethene, was also examined, as well as the behavior of PFAS mixtures and fluorocarbon-hydrocarbon surfactant mixtures. The data were interpreted within the framework of a QSPR model recently developed to predict fluid-fluid interfacial adsorption coefficients (Ki) of PFAS. The results demonstrate that all of the factors investigated have some degree of impact on Ki values. Thus, the composition of soil-pore water and groundwater is likely to affect the magnitude of PFAS adsorption at air-water and organic liquid-water interfaces. However, the influence on Ki of most of the factors investigated is small for lower PFAS concentrations (less than ∼1-10 mg/L). Hence, their impacts on fluid-fluid interfacial adsorption are likely to be relatively minor at the low PFAS concentrations representative of many environmental systems, especially compared to the impact of other factors such as fluid saturations, porous-medium properties, and PFAS molecular structure. The results of this study indicate that the revised QSPR model provides reasonable first-order predictions of Ki for a wide range of PFAS in environmental systems.
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Affiliation(s)
- Mark L Brusseau
- Soil, Water and Environmental Science Department, School of Earth and Environmental Sciences, University of Arizona, 429 Shantz Bldg, USA; Hydrology and Atmospheric Sciences Department, School of Earth and Environmental Sciences, University of Arizona, 429 Shantz Bldg, USA.
| | - Sarah Van Glubt
- Soil, Water and Environmental Science Department, School of Earth and Environmental Sciences, University of Arizona, 429 Shantz Bldg, USA
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