Non-conventional sorption materials for the removal of legacy and emerging PFAS from water: A review

Calore, Francesco; Badetti, Elena; Bonetto, Alessandro; Pozzobon, Anna; Marcomini, Antonio

doi:10.1016/j.emcon.2024.100303

Cited by 3 publications

(1 citation statement)

References 175 publications

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“…Regarding biodegradation and metabolization, both long-and short-chain PFAS are considered metabolically inert since any functional derivative (i.e., precursor) will be transformed into the respective acid [11,13].…”

Section: Pfas Chain Lengthmentioning

confidence: 99%

The Removal of Per- and Poly-Fluoroalkyl Substances from Water: A Review on Destructive and Non-Destructive Methods

Malouchi,

Chatzimichailidou,

Tolkou

et al. 2024

Separations

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PFAS, or per- and poly-fluoroalkyl substances, are a broad group of man-made organic compounds that are very persistent, mobile, and tend to bioaccumulate. Their removal from different environmental media is becoming increasingly important because they are associated with a multitude of (eco)toxicological effects on both humans and the environment. PFAS are detected in wastewater, groundwater, drinking water, and surface water, with the subcategories of PFOS and PFOA being the most detected. These organic compounds are divided into polymeric and non-polymeric groups. Non-polymeric PFAS are of great research interest due to their frequent detection in the environment. Numerous methods have been applied for the removal of PFAS and are divided into destructive and non-destructive (separation) techniques. Given the strength of the C–F bond, the destruction of PFAS is challenging, while for most of the separation techniques, the management of isolated PFAS requires further consideration. Most of the techniques have been applied to small-scale applications and show some limitations for larger applications, even though they are promising. Adsorption is an environmentally sustainable, economical, and high-performance technique that is applied to remove several classes of emerging pollutants from water. In this review, the use of various types of adsorbents for PFAS removal from water is reported, as well as the expected adsorption mechanisms. There are several technologies being considered and developed to manage PFAS; however, they are still in the experimental stage, with each showing its appeal for potential larger applications.

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Section: Pfas Chain Lengthmentioning

confidence: 99%

The Removal of Per- and Poly-Fluoroalkyl Substances from Water: A Review on Destructive and Non-Destructive Methods

Malouchi,

Chatzimichailidou,

Tolkou

et al. 2024

Separations

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Environmental Restoration of Contaminated Sediment and Soils: The Role of Organic Amendments in PAH Remediation

Beljin,

Đukanović,

Rončević

et al. 2024

Curr Pollution Rep

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Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous; persistent environmental pollutants generated mostly during the incomplete combustion of organic materials. Because of the dangers that bioavailable PAH fraction pose to receptors, the necessity of the site, the degree of exposure, and the potential for toxicity, remediation of PAH-contaminated locations is crucial. Recent findings suggest that organic amendments, such as compost, manure, and cover crops, play a crucial role in improving soil/sediment health by increasing organic matter content, enhancing structure, fostering beneficial microbial activity, and removing the pollutants. Moreover, they contribute to nutrient cycling and retention, reducing the need for synthetic fertilizers, and mitigating their adverse effects on the environment. In summary, it is considered that organic amendments offer promising solutions for sustainable remediation, restoration, and agriculture practise, promoting soil/sediment health and productivity while reducing environmental impacts. However, there remains a critical gap in understanding the effects of these materials, their preparation and application into the environment on groundwater quality, and their long-term impacts on sediment, water, and soil quality. This review paper aims to identify future research directions and open further questions based on what has been published so far in this area. Graphical Abstract

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Understanding the Selective Removal of Perfluoroalkyl and Polyfluoroalkyl Substances via Fluorine–Fluorine Interactions: A Critical Review

Fu,

Huang,

Luo

et al. 2024

Environ. Sci. Technol.

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As regulatory standards for per- and polyfluoroalkyl substances (PFAS) become increasingly stringent, innovative water treatment technologies are urgently demanded for effective PFAS removal. Reported sorbents often exhibit limited affinity for PFAS and are frequently hindered by competitive background substances. Recently, fluorinated sorbents (abbreviated as fluorosorbents) have emerged as a potent solution by leveraging fluorine–fluorine (F···F) interactions to enhance selectivity and efficiency in PFAS removal. This review delves into the designs and applications of fluorosorbents, emphasizing how F···F interactions improve PFAS binding affinity. Specifically, the existence of F···F interactions results in removal efficiencies orders of magnitude higher than other counterpart sorbents, particularly under competitive conditions. Furthermore, we provide a detailed analysis of the fundamental principles underlying F···F interactions and elucidate their synergistic effects with other sorption forces, which contribute to the enhanced efficacy and selectivity. Subsequently, we examine various fluorosorbents and their synthesis and fluorination techniques, underscore the importance of accurately characterizing F···F interactions through advanced analytical methods, and emphasize the significance of this interaction in developing selective sorbents. Finally, we discuss challenges and opportunities associated with employing advanced techniques to guide the design of selective sorbents and advocate for further research in the development of sustainable and cost-effective treatment technologies leveraging F···F interactions.

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Non-conventional sorption materials for the removal of legacy and emerging PFAS from water: A review

Cited by 3 publications

References 175 publications

The Removal of Per- and Poly-Fluoroalkyl Substances from Water: A Review on Destructive and Non-Destructive Methods

The Removal of Per- and Poly-Fluoroalkyl Substances from Water: A Review on Destructive and Non-Destructive Methods

Environmental Restoration of Contaminated Sediment and Soils: The Role of Organic Amendments in PAH Remediation

Understanding the Selective Removal of Perfluoroalkyl and Polyfluoroalkyl Substances via Fluorine–Fluorine Interactions: A Critical Review

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