Application of β-Cyclodextrin Adsorbents in the Removal of Mixed Per- and Polyfluoroalkyl Substances DOI Creative Commons

Elham Abaie,

Manish Kumar, Naveen Kumar

et al.

Toxics, Journal Year: 2024, Volume and Issue: 12(4), P. 264 - 264

Published: March 31, 2024

The extensive use of per- and polyfluoroalkyl substances (PFASs) in industrial consumer products has led to groundwater contamination, raising concerns for human health the environment. These persistent chemicals exist different forms with varying properties, which makes their removal challenging. In this study, we assessed effectiveness three β-cyclodextrin (β-CD) adsorbents at removing a mixture PFASs, including anionic, neutral, zwitterionic compounds, neutral pH. We calculated linear partition coefficient (Kd) values quantify adsorption affinity each PFAS. β-CD polymers crosslinked hexamethylene diisocyanate (β-CD-HDI) epichlorohydrin (β-CD-EPI) displayed some PFASs. Benzyl chloride (β-CD-Cl), an adsorbent that had not been previously reported, was also synthesized tested PFAS adsorption. β-CD-Cl exhibited higher than β-CD-HDI β-CD-EPI, log Kd ranging from 1.9 L·g−1 3.3 L·g−1. no as opposed removed N-dimethyl ammonio propyl perfluorohexane sulfonamide (AmPr-FHxSA). A comparison between Kow confirmed significant role hydrophobic interactions thee mechanism. This effect stronger β-CD-Cl, compared β-CD-EPI. While charge observed influence less negative compounds being more adsorbed. PFASs by similar magnitude other proposed literature. However, it offers advantage containing fluorine, unlike many commonly adsorbents.

Language: Английский

A review of PFAS adsorption from aqueous solutions: Current approaches, engineering applications, challenges, and opportunities DOI Creative Commons
Xiaobo Lei, Qiyu Lian, Xu Zhang

et al.

Environmental Pollution, Journal Year: 2023, Volume and Issue: 321, P. 121138 - 121138

Published: Jan. 23, 2023

Language: Английский

Citations

157
Porous organic polymers (POPs) for environmental remediation DOI
Sahel Fajal, Subhajit Dutta, Sujit K. Ghosh

et al.

Materials Horizons, Journal Year: 2023, Volume and Issue: 10(10), P. 4083 - 4138

Published: Jan. 1, 2023

Porous organic polymers show great potential for addressing environmental pollution challenges, including chemical sensing, wastewater treatment, toxic gas sorption, heterogeneous catalysis, and further promoting sustainable remediation strategies.

Language: Английский

Citations

106
Porous Materials for Water Purification DOI Creative Commons
Yanpei Song,

Joshua Phipps,

Changjia Zhu

et al.

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 62(11)

Published: Dec. 20, 2022

Abstract Water pollution is a growing threat to humanity due the pervasiveness of contaminants in water bodies. Significant efforts have been made separate these hazardous components purify polluted through various methods. However, conventional remediation methods suffer from limitations such as low uptake capacity or selectivity, and current quality standards cannot be met. Recently, advanced porous materials (APMs) shown promise improved segregation compared traditional selectivity. These feature merits high surface area versatile functionality, rendering them ideal platforms for design novel adsorbents. This Review summarizes development employment APMs variety treatments accompanied by assessments task‐specific adsorption performance. Finally, we discuss our perspectives on future opportunities purification.

Language: Английский

Citations

88
Ultratrace PFAS Detection Using Amplifying Fluorescent Polymers DOI
Alberto Concellón, Jesús Castro‐Esteban, Timothy M. Swager

et al.

Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: 145(20), P. 11420 - 11430

Published: May 11, 2023

Per- and poly(fluoroalkyl) substances (PFAS) are environmentally persistent pollutants that of growing concern due to their detrimental effects at ultratrace concentrations (ng·L-1) in human environmental health. Suitable technologies for on-site detection PFAS do not exist current methods require complex specialized equipment, making the monitoring distributed water infrastructures extremely challenging. Herein, we describe amplifying fluorescent polymers (AFPs) can selectively detect perfluorooctanoic acid (PFOA) perfluorooctane sulfonate (PFOS) ng·L-1. The AFPs highly fluorinated have poly(p-phenylene ethynylene) polyfluorene backbones bearing pyridine-based selectors react with acidic via a proton-transfer reaction. regions within partition into polymers, whereas protonated pyridine units create lower-energy traps excitons, emission from these pyridinium sites results red-shifting fluorescence spectra. evaluated thin-film nanoparticle forms ∼1 ppb ∼100 ppt, respectively. Both polymer films nanoparticles affected by type water, similar responses were found milliQ DI well water. These demonstrate promising sensing approach aqueous ng·L-1 range.

Language: Английский

Citations

35
Is sorption technology fit for the removal of persistent and mobile organic contaminants from water? DOI Creative Commons
Benedikt M. Aumeier, Anett Georgi, Navid Saeidi

et al.

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 880, P. 163343 - 163343

Published: April 6, 2023

Persistent, Mobile, and Toxic (PMT) very persistent mobile (vPvM) substances are a growing threat to water security safety. Many of these distinctively different from other more traditional contaminants in terms their charge, polarity, aromaticity. This results sorption affinities towards sorbents such as activated carbon. Additionally, an increasing awareness on the environmental impact carbon footprint technologies puts some energy-intensive practices treatment into question. Commonly used approaches may thus need be readjusted become fit for purpose remove challenging PMT vPvM substances, including example short chained per- polyfluoroalkyl (PFAS). We here critically review interactions that drive organic compounds related sorbent materials identify opportunities limitations tailoring removal. Other less materials, ion exchange resins, modified cyclodextrins, zeolites metal-organic frameworks then discussed potential alternative or complementary use scenarios. Sorbent regeneration evaluated potential, considering reusability, on-site regeneration, local production. In this context, we also discuss benefits coupling destructive separation technologies. Finally, sketch out possible future trends evolution removal water.

Language: Английский

Citations

34
Enhanced adsorption of short-chain perfluorobutanoic acid by functionalized periodic mesoporous organosilica: Performance and mechanisms DOI Creative Commons
Xiaopeng Min, Yin Wang

Journal of Hazardous Materials, Journal Year: 2023, Volume and Issue: 449, P. 131047 - 131047

Published: Feb. 20, 2023

Language: Английский

Citations

33
Advancing PFAS Sorbent Design: Mechanisms, Challenges, and Perspectives DOI Creative Commons
Yutong He,

Xinrong Cheng,

Samruddhi Jayendra Jayendra Gunjal

et al.

ACS Materials Au, Journal Year: 2023, Volume and Issue: 4(2), P. 108 - 114

Published: Nov. 9, 2023

Per- and polyfluoroalkyl substances (PFAS) are a group of synthetic chemicals characterized with persistence multisurface resistance. Their accumulation in the environment toxicity to human beings have contributed rapid development regulations worldwide since 2002. The sorption strategy, taking advantage intermolecular interactions for PFAS capture, provides promising efficient solution treatment contaminated sources. Hydrophobic electrostatic two commonly found commercially available sorbents, fluorous interaction being novel mechanism applied sorbent selectivity. main object this Perspective is provide critical review on current design criteria particular focus their mechanisms as well limitations. An outlook future innovative sorbents also provided.

Language: Английский

Citations

24
A Comprehensive Review of Novel Adsorbents for Per- and Polyfluoroalkyl Substances in Water DOI
Fuqiang Liu, Joseph J. Pignatello, Runze Sun

et al.

ACS ES&T Water, Journal Year: 2024, Volume and Issue: 4(4), P. 1191 - 1205

Published: March 8, 2024

Recent literature has seen a significant surge in studies focusing on new adsorbent materials for per- and polyfluoroalkyl substances (PFASg), class of contaminants found natural waters worldwide that pose considerable threat to human environmental health. Despite growing interest, the fundamental mechanisms PFAS adsorption these are not fully understood, thus hindering progress developing effective solutions removal. This Review aims bridge knowledge gap by offering critical appraisal recent innovations specifically designed treating PFAS. Strategies aimed at enhancing nanopore capacity or introducing anion-exchange capabilities have shown promise. Innovative such as carbon nanotubes, graphene, graphene oxide evaluated. Modified clay-based silica-based adsorbents demonstrated efficacy removing PFAS, driven hydrophobic effect, Coulombic interactions, electrostatic interactions. Polymers, ranging from types synthetic variants, promise removal across wide pH range. We discuss including F–F ion-pair adsorption, ion exchange chemically thermally modified provide general guideline design adsorbents. offers holistic view advances related materials.

Language: Английский

Citations

17
Understanding the Selective Removal of Perfluoroalkyl and Polyfluoroalkyl Substances via Fluorine–Fluorine Interactions: A Critical Review DOI
Kaixing Fu,

Jinjing Huang,

Fang Luo

et al.

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 12, 2024

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

Language: Английский

Citations

15
Non-conventional sorption materials for the removal of legacy and emerging PFAS from water: A review DOI Creative Commons
Francesco Calore, Elena Badetti, Alessandro Bonetto

et al.

Emerging contaminants, Journal Year: 2024, Volume and Issue: 10(3), P. 100303 - 100303

Published: Feb. 8, 2024

and polyfluoroalkyl substances (PFAS) are a class of ubiquitous, persistent, hazardous pollutants that raise concerns for human health the environment. Typically, PFAS removal from water relies on adsorption techniques using conventional sorption materials like activated carbons (ACs) ion exchange resins (IERs). However, there is continuous search more efficient performing adsorbent to better address wide range chemical structures in environment, increase their selectivity, achieve an overall high capacity faster uptake kinetics. In this context, results application non-conventional (i.e., readily available biological-based proteins advanced nanocomposites cyclodextrins) reported discussed consideration following criteria: i) efficiency kinetics legacy (e.g., PFOA, PFBA) as well newly-introduced emerging GenX), ii) representativity environmental conditions experimental setup use environmentally relevant concentrations), iii) regenerability, reusability applicability materials, iv) role material modifications adsorption. From review, it emerged organic frameworks, nano(ligno)cellulosic-based layered double hydroxides among most promising herein investigated adsorption, was also observed presence fluorine- amine-moieties structure improve both selectivity uptake. lack data real environments costs involved means research still its infancy need further investigation.

Language: Английский

Citations

13