Water Air & Soil Pollution, Journal Year: 2025, Volume and Issue: 236(8)
Published: June 2, 2025
Language: Английский
ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(22), P. 28409 - 28422
Published: May 20, 2024
Cross-linked β-cyclodextrin (β-CD) polymers are promising adsorbents for the removal of per- and polyfluoroalkyl substances (PFAS) from contaminated water sources, including groundwater, drinking water, wastewater. We previously reported porous, styrene-functionalized (StyDex) derived radical polymerization with vinyl comonomers. Because versatility these polymerizations, StyDex polymer compositions tunable, which facilitates efforts to establish structure–adsorption relationships discover improved materials. Here, we evaluate material properties PFAS adsorption 20 derivatives varied comonomer structure loading, regiochemistry styrene placement on CD monomer, size. A containing N,N′-dimethylbutyl ammonium ions exhibited most effective in batch experiments. Furthermore, a β-CD size-selective host–guest interactions perfluoroalkyl acids (PFAAs) neutral contaminants aqueous electrolyte when compared similar either α-CD or γ-CD. Polymers based monomers an average seven groups randomly positioned over 21 available hydroxyl performed similarly those monomer functionalized regiospecifically at each 6′ positions. The former is prepared single step unmodified β-CD, so ability use it without compromising performance demonstrates promise developing economically competitive adsorbents. These results offered important insights into will inform design formulations.
Language: Английский
Citations
7
Journal of Hazardous Materials, Journal Year: 2023, Volume and Issue: 464, P. 133018 - 133018
Published: Nov. 16, 2023
Language: Английский
Citations
13
Environment International, Journal Year: 2023, Volume and Issue: 181, P. 108256 - 108256
Published: Oct. 10, 2023
Per- and polyfluoroalkyl substances (PFAS) are a group of xenobiotics that widely distributed throughout the aquatic environment. Many PFAS possible thyroid hormone (TH) system disrupting compounds, because they have capacity to -amongst other- inhibit TH thyroxine (T4) from binding its transport protein transthyretin (TTR). This study investigated occurrence TH-displacing activity in Dutch water cycle, more specifically, contribution this effect. Over one year monitoring data 29 (linear branched) showed continuous presence drinking waters their surface sources. Secondly, FITC-T4 TTR-TRβ-CALUX bioassays were mutually compared using positive (HPLC-grade spiked with PFOA) negative control samples water), as well relative potency factors (RPFs) up 20 congeners. Both assays found be suitable for measuring samples. As third aim, field was performed cycle comprised water, contaminated sites, 2 wastewater treatment plants. All analyzed 1. chemical analysis PFAS, 2. bioassay, 3. bioassay. The good correlation (R2 0.85). Bioanalytical equivalent concentrations (BEQ) based on chemically-determined RPFs (BEQchem) revealed only explained ≤4.1 % extracts measured by both (BEQbio). indicated yet unknown compounds contribute majority activity. Moreover, processes (e.g. DW production SW) larger target BEQbio. could first lead identify activity, such, enable assessment risks associated water.
Language: Английский
Citations
12
Environmental Research, Journal Year: 2024, Volume and Issue: unknown, P. 120590 - 120590
Published: Dec. 1, 2024
Language: Английский
Citations
5
ACS ES&T Water, Journal Year: 2024, Volume and Issue: unknown
Published: Dec. 26, 2024
The occurrence and risk assessment of legacy emerging poly- perfluoroalkyl substances (PFAS) in aquatic environments are attracting public concern due to their environmental persistence potential risks ecosystems humans. This study investigated the distribution, partitioning, ecological PFAS four rivers Pearl River Delta (PRD). results showed that mean values ∑33PFAS surface water ∑30PFAS sediment were 69 2.3 ng/g, respectively, with concentrations ranging from 0.13 1400 ng/L 0.025 150 ng/g. 6:2 fluorotelomer sulfonic acid (6:2 FTSA) perfluorooctanoic (PFOA) most abundant individual water, while perfluorohexanoic (PFHxA), FTSA, phosphate diester (di-PAP) dominated profile sediment. Field-derived water-sediment partitioning coefficients (Kd Koc) significantly correlated carbon chain length (p < 0.001). Source apportionment first indicated firefighting metal plating (67%) primary sources PRD. Perfluorooctanesulfonate (PFOS) was associated high both
Language: Английский
Citations
5
The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 920, P. 171010 - 171010
Published: Feb. 17, 2024
Language: Английский
Citations
4
Biointerphases, Journal Year: 2023, Volume and Issue: 18(3)
Published: May 1, 2023
Per- and polyfluoroalkyl substances (PFAS) have been used to waterproof greaseproof food serviceware for decades. Health concerns about these compounds drawn attention the potential contamination of system. Finished compost (n = 3) made from manure labeled “compostable” generated at a large fair was found contain 12 or 13 28 PFAS sampled for, in concentrations ranging 1.1 183 μg/kg (Σ28PFAS range 209–455 μg/kg). Of note, perfluorooctanoic acid, known carcinogen, between 47.2 55.5 μg/kg. In contrast, fresh contained only perfluoroctanesulfonic acid 3.7 μg/kg, separated waste composted with grass clippings livestock bedding had no detectable 2022, Σ28PFAS 9.6 2019. Including compostable likely contaminates finished threatens surrounding groundwater surface waters, addition increasing crop uptake.
Language: Английский
Citations
9
The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 920, P. 170997 - 170997
Published: Feb. 15, 2024
Per- and Polyfluoroalkyl substances (PFAS) are a class of persistent chemicals, whose impact has been observed in various environmental compartments. Wastewater treatment plants (WWTPs) considered major emission pathway PFAS, specifically the context aquatic environment. The goal this study was to develop compartmentalized, source-based load estimation model 7 PFAS within municipal wastewater influent. Consumer statistics, data from literature on concentrations release during use, specific sampling activities for flows related city were used estimate per capita loads. Model results compared with loads obtained through monitoring campaign at WWTP A wide range discrepancies (≈5 % ≈90 %) between influent source based estimates noticed. less accounted by associated sulfonic acids (PFSAs), whereas carboxylic (PFCAs) most could be reasonably explained model, even an overestimation nearly 5 noted PFNA. Higher heterogeneity sources PFCA group, noticeable dominance share consumer products. PFSAs had product input (<20 %), rest modelled being attributed inputs. large gap unknown indicates need examination other, not yet quantified that can potentially explain remainder load. Especially commercial as potential additional PFSAs. These findings signify importance originate both products, well inputs overall contribution into sewage, while identifying further investigation emitted wastewater.
Language: Английский
Citations
3
Circular Economy and Sustainability, Journal Year: 2025, Volume and Issue: unknown
Published: Feb. 26, 2025
Language: Английский
Citations
0
The Science of The Total Environment, Journal Year: 2025, Volume and Issue: 969, P. 178803 - 178803
Published: Feb. 27, 2025
Language: Английский
Citations
0