Selectivity of Per- and Polyfluoroalkyl Substance Sensors and Sorbents in Water

Darling, Seth B.; Chen, Junhong

doi:10.1021/acsami.1c16517

Cited by 57 publications

(59 citation statements)

References 137 publications

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“…It is important to consider a key factor for process implementation, ion exchange resin selectivity, which are classified by fluorinated groups, cationic groups, and cavitary groups. To improve the remediation process, their synergy effects have been probed (Wang et al, 2021). Alternative methods such as enhanced photolysis, and sonochemical destruction can conduct reduction of PFAs at some level.…”

Section: Lab-scale Emerging Treatments For Polyfluoroalkyl and Perflu...mentioning

confidence: 99%

Detection and Tertiary Treatment Technologies of Poly-and Perfluoroalkyl Substances in Wastewater Treatment Plants

Araújo

Rodríguez-Hernández

González-González

et al. 2022

Front. Environ. Sci.

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PFAS are a very diverse group of anthropogenic chemicals used in various consumer and industrial products. The properties that characterize are their low degradability as well as their resistance to water, oil and heat. This results in their high persistence in the environment and bioaccumulation in different organisms, causing many adverse effects on the environment as well as in human health. Some of their effects remain unknown to this day. As there are thousands of registered PFAS, it is difficult to apply traditional technologies for an efficient removal and detection for all. This has made it difficult for wastewater treatment plants to remove or degrade PFAS before discharging the effluents into the environment. Also, monitoring these contaminants depends mostly on chromatography-based methods, which require expensive equipment and consumables, making it difficult to detect PFAS in the environment. The detection of PFAS in the environment, and the development of technologies to be implemented in tertiary treatment of wastewater treatment plants are topics of high concern. This study focuses on analyzing and discussing the mechanisms of occurrence, migration, transformation, and fate of PFAS in the environment, as well the main adverse effects in the environment and human health. The following work reviews the recent advances in the development of PFAS detection technologies (biosensors, electrochemical sensors, microfluidic devices), and removal/degradation methods (electrochemical degradation, enzymatic transformation, advanced oxidation, photocatalytic degradation). Understanding the risks to public health and identifying the routes of production, transportation, exposure to PFAS is extremely important to implement regulations for the detection and removal of PFAS in wastewater and the environment.

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Section: Lab-scale Emerging Treatments For Polyfluoroalkyl and Perflu...mentioning

confidence: 99%

Detection and Tertiary Treatment Technologies of Poly-and Perfluoroalkyl Substances in Wastewater Treatment Plants

Araújo

Rodríguez-Hernández

González-González

et al. 2022

Front. Environ. Sci.

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“…In addition to electrochemical sensing, there is also a growing interest to utilize electro‐sorption to remove PFAS and PFOS molecules in aqueous environment using high surface area electrodes, such as multiwalled carbon nanotube, activated carbon, or aerogels [13] . In general, PFAS materials are anionic under normal environmental pH conditions due to their low pK a values [14] . The adsorption interaction between a PFAS molecule and an electrode material is mostly electrostatic.…”

Section: Introductionmentioning

confidence: 99%

Understanding PFOS Adsorption on a Pt Electrode for Electrochemical Sensing Applications

Gogoi

Yao

2022

ChemElectroChem

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Per-and polyfluroalkyl substances (PFAS) are drawing increasing attention in the research community due to their wide spread applications and their toxicity to animals and humans. Effective early detection method of PFAS chemicals in aqueous environment is important to reduce exposure and mitigate the potential toxic effects. This study focuses on the electrochemical detection of per-fluoro octane sulfonate (PFOS) with differential pulse voltammetry and electrochemical impedance spectroscopy on a bare platinum electrode. We observe three distinct regions of adsorption behaviors with respect to PFOS concentration from 0-1000 nM, reflecting changes in the modes of adsorption due to different adsorbate-adsorbate interactions on a bare electrode. The adsorption isotherm constant for PFOS adsorption on a Pt electrode is calculated to be 1.6 × 10 12 cm 3 mol À 1 from fitting the electrochemical data with a modified Langmuir isotherm model.

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“…Alternatively, the development of novel adsorbents capable of isolating dilute solutes from complex mixtures will enable a number of emerging applications. [7] For example, these separating agents could be deployed to extract resources from non-traditional sources (e.g., uranium from seawater), [8][9][10][11][12][13][14][15][16][17] to recycle critical materials (e.g., rare earth elements) from spent electronics, [18,19] and to forestall pending environmental disasters (e.g., through direct air capture of carbon dioxide [20][21][22] or the removal of per-and polyfluoroalkyl substances (PFAS) [23,24] from water resources). In comparison to permeation-based membrane separations, which struggle to separate dilute solutes due to low driving forces, adsorption-based separations are well-situated to execute these challenging separations.…”

Section: Introductionmentioning

confidence: 99%

Design Considerations for Next‐Generation Polymer Sorbents: From Polymer Chemistry to Device Configurations

Ouimet

Phillip

et al. 2022

Macro Chemistry & Physics

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Adsorption‐based separations have the potential to enhance the sustainability of established industrial processes and facilitate the adoption of new practices. They also provide ways to meet emerging needs in the isolation of resources from non‐traditional supplies and the remediation of hazardous environmental contaminants. In this regard, there are significant opportunities to advance both fundamental polymer science and engineering applications through next‐generation adsorbent systems. Here, after briefly reviewing the history, potential application space, and underlying physics of polymer sorbents, design considerations that connect macromolecular design with systems‐level functionality, are discussed. First, polymer processing conditions are discussed in terms of the final nano‐ and microscale structures produced. Subsequently, the macromolecular chemistry of the materials is analyzed with respect to the ability of the separations systems to have analyte‐specific binding. Finally, a similar analysis is performed regarding the desorption mechanism used to release the target solutes. In this way, the manuscript attempts to connect macromolecular architecture with polymer physics and materials processing to provide guidance on how these important interrelationships impact the ultimate performance of sorbent systems.

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Selectivity of Per- and Polyfluoroalkyl Substance Sensors and Sorbents in Water

Cited by 57 publications

References 137 publications

Detection and Tertiary Treatment Technologies of Poly-and Perfluoroalkyl Substances in Wastewater Treatment Plants

Detection and Tertiary Treatment Technologies of Poly-and Perfluoroalkyl Substances in Wastewater Treatment Plants

Understanding PFOS Adsorption on a Pt Electrode for Electrochemical Sensing Applications

Design Considerations for Next‐Generation Polymer Sorbents: From Polymer Chemistry to Device Configurations

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