Prevalent Per- and Polyfluoroalkyl Substances (PFASs) Pollution in Freshwater Basins in China: A Short Review

Toxics, Journal Year: 2025, Volume and Issue: 13(2), P. 135 - 135

Published: Feb. 13, 2025

Organic pollutants like per- and polyfluoroalkyl substances (PFASs) exhibit persistence, bioaccumulation, resistance to degradation, high toxicity, garnering significant attention from scholars worldwide. To better address mitigate the environmental risks posed by PFASs, this paper employs bibliometric analysis examine literature on PFASs' concentrations collected in Web of Science (WoS) database between 2019 2024. The results show that overall trend pollution research is relatively stable increasing. In addition, study also summarizes status traditional PFASs across different media typical freshwater basins. It analyzes surface water, sediment, aquatic organisms, elucidating their distribution characteristics potential sources. While perfluorooctanoic acid (PFOA) perfluorooctane sulfonic (PFOS) levels water environments are declining annually, short-chain substitutes emerging as primary pollutants. Short-chain frequently detected whereas long-chain tend accumulate sediments. more likely concentrate protein-rich organs tissues. presence largely influenced human activities, such metal plating, fluoride industry development, industrial wastewater discharge. Currently, development China faces a complex dilemma, entangled policy legal constraints, production demands, use new alternatives, regulation restriction, creating vicious cycle. Breaking deadlock necessitates continuous active scientific particularly PFOS, with an emphasis detailed investigations sources sinks. Furthermore, ecological health risk assessments were conducted using Risk Quotient (RQ) Hazard (HQ) methods. Comprehensive comparison indicates (such PFOA) majority basins at low-risk level (RQ < 0.1 or HQ 0.2), PFOS some medium-risk (0.1 RQ 1), no basin high-risk level. adsorption removal approaches analyzed, revealing combination multiple treatment technologies novel integrated technology holds excellent prospects for PFASs.

Language: Английский

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Fluorinated LDHs for selective sorption of PFOS: Unveiling the roles of increased hydrophobicity and F-F interactions

Separation and Purification Technology, Journal Year: 2025, Volume and Issue: unknown, P. 131851 - 131851

Published: Jan. 1, 2025

Language: Английский

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Fe Template-Based Metal-Organic Frameworks for Advanced Gas and Vapor Adsorption: Unveiling the Role of Mesoporous Diffusivity and Density Functional Theory Insights in Functional Compatibility

Published: Jan. 1, 2025

Language: Английский

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KOH-Assisted Chemical Activation of Camelina Meal (Wild Flax) to Treat PFOA-Contaminated Wastewater

Sustainability, Journal Year: 2025, Volume and Issue: 17(5), P. 2170 - 2170

Published: March 3, 2025

This study is constituted of the chemical activation camelina meal (CM) biochar and utilization these activated carbon for adsorption perfluorooctanoic acid (PFOA) from water. Camelina meal, a sustainable agro-based byproduct, underwent slow pyrolysis subsequent with potassium carbonate (K2CO3), hydroxide (KOH), sodium (NaOH). Among activating agents, KOH emerged as one most efficient yielding superior surface properties significantly higher content. After screening central composite design (CCD) was employed to optimize critical constraints like temperature (600–900 °C), time (60–120 min), KOH-to-feed ratio (0.5–1.5), objective maximizing area capacities samples. The exhibited substantial enhancement in PFOA efficacy. Optimal achieved using produced at 800 °C an 60 min 1.5. material 1558.4 m2/g demonstrated removal efficiency 92.3%. findings underscore efficacy chemically ecological adsorbent remediation PFOA-polluted

Language: Английский

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Construction of F, N-riched covalent organic framework adsorbent for efficient glucocorticoids adsorption

Journal of environmental chemical engineering, Journal Year: 2025, Volume and Issue: unknown, P. 116126 - 116126

Published: March 1, 2025

Language: Английский

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Electrochemical Sensing of Perfluorooctanoic Acid via a Rationally Designed Fluorine-Functionalized Cu-MOF and In-Depth Analysis of Sensing Mechanism

Analytical Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: March 10, 2025

Perfluorooctanoic acid (PFOA), a prominent member of the per- and polyfluoroalkyl substance (PFAS) family, has emerged as new perpetual pollutant posing significant environmental health risks, necessitating developing highly selective materials for its sensitive detection in water. In this work, we developed an electroactive fluorine-functionalized Cu-MOF (F-Cu-NH2BDC) through postmodification copper-2-amino-terephthalic (Cu-NH2BDC) MOF with 2,3,5,6-tetrafluoroterephthalaldehyde (TFTA). Experimental computational results suggested that F-F interactions between decorated tetrafluorobenzaldehyde groups PFOA, well among PFOA molecules themselves, would induce self-aggregation on surfaces or pores F-Cu-NH2BDC. This specific aggregation inhibited contact electron transfer F-Cu-NH2BDC electrolyte, resulting decrease inherent electrochemical Cu2+/Cu+ redox signal from Based this, F-Cu-NH2BDC-based label- probe-free sensor was exploited excellent linear range 5 pM to 500 μM extremely low limit 3.54 pM, surpassing most currently reported nonelectrochemical PFAS sensors. also exhibited good stability, reproducibility, anti-interference performance, enabling accurate measurement concentrations actual commercial drinking These findings shed light design sensors utilizing interaction working mechanism.

Language: Английский

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How Do Novel PFAS Sorbents Fit into Current Engineering Paradigm?

ACS ES&T Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: March 11, 2025

Language: Английский

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One-step synthesis of reduced graphene oxide/activated carbon composite for efficient removal of per- and polyfluoroalkyl substances from drinking water: Adsorption mechanisms and DFT study

Separation and Purification Technology, Journal Year: 2025, Volume and Issue: unknown, P. 132797 - 132797

Published: April 1, 2025

Language: Английский

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A Critical Review of Sensors for Detecting Per- and Polyfluoroalkyl Substances: Focusing on Diverse Molecular Probes

Environmental Research, Journal Year: 2025, Volume and Issue: unknown, P. 121669 - 121669

Published: April 1, 2025

Language: Английский

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Unveiling the Differential Intensity of Fluorous Active Sites Toward Selective Polyfluoroalkyl Substance Removal: Insights into Adsorption and Desorption Trade-Offs

Environmental Science & Technology, Journal Year: 2025, Volume and Issue: unknown

Published: May 1, 2025

The design of selective sorption sites for per- and polyfluoroalkyl substance (PFAS) removal, integrated with efficient regenerative strategies, remains a critical yet underexplored challenge. While existing technologies prioritize adsorption capacity over sustainability, we engineered fluorinated hydrogel tailored fluorous binding to target PFAS via their hydrophobic C-F termini. This achieved 90% removal efficiency in real water matrices (e.g., tap lake water), at environmentally relevant concentrations (1 μg L-1), robust resistance competing background ions natural organic matter. Selectivity correlated strongly chain length (F9 > F12 F6), driven by stable configurations (C-F···F-C vs C-H···F-C) favorable energy -29.06 kcal mol-1. Leveraging controlled noncovalent F···F interactions, the enabled desorption (60-80% using 1% NaCl, NH4Cl, or 0.5% NH4OH-NH4Cl) without structural degradation. Full regeneration (>92% recovery) was 50% methanol, supporting five reuse cycles minimal performance decline. In continuous operation, NaCl 10-fold enrichment, while methanol significantly higher 51-fold enrichment. Both approaches reduced eluent consumption 20-50% compared conventional activated carbon resins. Overall, balancing trade-offs reduces environmental footprint operational costs, providing sustainable strategy remediation.

Language: Английский

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