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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A Critical Review on PFAS Removal from Water: Removal Mechanism and Future Challenges

Sustainability, Journal Year: 2023, Volume and Issue: 15(23), P. 16173 - 16173

Published: Nov. 21, 2023

Per and polyfluoroalkyl substances (PFAS) have been extensively employed in a broad range of manufacturing consumer goods due to their highly persistent nature. PFAS exposure is recognized pose serious health hazards; therefore, addressing pollution water has become top priority for public environmental protection organizations. This review article focuses on the efficiency different removal techniques (activated carbon, biochar, ion exchange resin, membrane filtration, reverse osmosis, metal-organic frameworks, foam fractionation, ozone destruction techniques) eliminating types short- long-chain from water. Hydrophobicity electrostatic interactions are revealed be primary mechanisms elimination PFAS. The all eradicate short-chain comparatively lower compared most efficient but some drawbacks, including formation precursors high operational costs. According findings study, it anticipated that combined methods will required effectively remediate PFAS-contaminated

Language: Английский

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Comparison of eco-improvement on constructed wetlands with nano zero valent iron introduction under different levels of PFOA stress: Perspectives on plant, microbe, and PFOA removal

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 891, P. 164052 - 164052

Published: May 29, 2023

Language: Английский

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Constructed wetlands as nature-based solutions in managing per-and poly-fluoroalkyl substances (PFAS): Evidence, mechanisms, and modelling

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 934, P. 173237 - 173237

Published: May 17, 2024

Per- and poly-fluoroalkyl substances (PFAS) have emerged as newly regulated micropollutants, characterised by extreme recalcitrance environmental toxicity. Constructed wetlands (CWs), a nature-based solution, gained widespread application in sustainable water wastewater treatment offer multiple societal benefits. Despite CWs potential, knowledge gaps persist their PFAS removal capacities, associated mechanisms, modelling of fate. This study carried out systematic literature review, supplemented unpublished experimental data, demonstrating the promise for from influents varying sources characteristics. Median performances 64, 46, 0 % were observed five free surface (FWS), four horizontal subsurface flow (HF), 18 vertical (VF) wetlands, respectively. adsorption substrate or plant root/rhizosphere was deemed key mechanism. Nevertheless, available dataset resulted unsuitable quantitative analysis. Data-driven models, including regression models machine learning-based Artificial Neural Networks (ANN), employed to predict removal. These showed better predictive performance compared various mechanistic which include two isotherms. The results affirmed that artificial intelligence is an efficient tool emerging contaminants with limited chemical properties. In summary, this consolidated evidence supporting use mitigating new legacy contaminants. Further research, especially long-term monitoring full-scale treating real wastewater, crucial obtain additional data model development validation.

Language: Английский

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Strengthening effect of different iron minerals for perfluorooctanoic acid and perfluorooctane sulphonic acid removal in constructed wetlands: Mechanisms of electron transfer and microbial effect

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 486, P. 150199 - 150199

Published: March 5, 2024

Language: Английский

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Research Progress on the Removal of Contaminants from Wastewater by Constructed Wetland Substrate: A Review

Water, Journal Year: 2024, Volume and Issue: 16(13), P. 1848 - 1848

Published: June 28, 2024

Constructed wetlands (CWs) primarily achieve efficient wastewater purification through synergistic interactions among substrates, plants, and microorganisms. Serving as the structural foundation of entire wetland system, substrates not only provide a growth medium for but also serve adhesive carriers microorganisms habitats animal activities. Research on has attracted considerable attention; however, in practical engineering applications, selection often depend personal experience, which may lead to significant gaps effectiveness systems treating different characteristic contaminants. Therefore, it is great significance investigate influence removal contaminants sewage identify substrate materials with good physical chemical properties optimize design operation CWs-based sewage-treatment improve their efficiency. In this review, bibliometric analysis was conducted using Web Science database VOSviewer_1.6.20 software assess progress research CWs. This article provides comprehensive overview types characteristics based recent advancements field. Additionally, discusses methods factors related conventional (COD, nitrogen, phosphorus), heavy metals (HMs), fluorinated compounds, pharmaceuticals, care products (PPCPs), microplastics. A thorough evaluation economic costs various ability remove major from water bodies, providing reference further development technology.

Language: Английский

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Removal of Contaminants in Stormwater via Subsurface-Flow Wetlands: A Review with Focus on Nutrients, Heavy Metals, and PFAS

Journal of Environmental Engineering, Journal Year: 2024, Volume and Issue: 150(3)

Published: Jan. 9, 2024

Subsurface-flow constructed wetlands (SSF CWs), which include horizontal subsurface–flow (HSSF CWs) and vertical (VSSF have become increasingly popular for the treatment of various waste streams such as wastewater, landfill leachate, stormwater runoff. These utilize a variety natural physical, chemical, microbial processes to effectively remove contaminants. This article aims provide valuable insights into application subsurface-flow runoff by collecting reviewing relevant articles. Within realm contaminants, this review primarily focuses on nutrients, heavy metal, per- polyfluoroalkyl substances (PFAS), are commonly found in worldwide. The removal percentages these contaminants vary across different studies, depending factors characteristics type scale wetland, well selection plants substrates used. study provides that significantly contribute including adsorption, plant uptake, biodegradation. percentage PFAS ranges from 1% 99% wetlands. wide range comes differences between category, soil type, wetland configuration, matrix effects. Additionally, paper brings attention current gaps limitations present research conducted within field. It is imperative conduct further studies utilizing real-world or synthetic deepen our comprehension domain. Furthermore, considering each category possesses unique properties, conducting individual group becomes crucial attain comprehensive understanding behavior transformation CWs.

Language: Английский

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Iron-dependent autotrophic denitrification as a novel microbial driven and iron-mediated denitrification process: A critical review

Environmental Research, Journal Year: 2025, Volume and Issue: unknown, P. 120808 - 120808

Published: Feb. 1, 2025

Language: Английский

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Modified basalt fiber filled in constructed wetland-microbial fuel cell: Comparison of performance and microbial impacts under PFASs exposure

Journal of Hazardous Materials, Journal Year: 2024, Volume and Issue: 476, P. 135179 - 135179

Published: July 13, 2024

Language: Английский

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Enhanced effect and mechanism of nano Fe-Ca bimetallic oxide modified substrate on Cu(II) and Ni(II) removal in constructed wetland

Journal of Hazardous Materials, Journal Year: 2023, Volume and Issue: 456, P. 131689 - 131689

Published: May 24, 2023

Language: Английский

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