4.7 Article

Application of Hydrothermal Alkaline Treatment to Spent Granular Activated Carbon: Destruction of Adsorbed PFASs and Adsorbent Regeneration

相关参考文献

注意:仅列出部分参考文献,下载原文获取全部文献信息。
Article Environmental Sciences

Destruction of PFAS in AFFF-impacted fire training pit water, with a continuous hydrothermal alkaline treatment reactor

Brian R. Pinkard et al.

Summary: With the establishment of regulations to limit the levels of PFAS in water, effective treatment technologies are needed to remove or destroy PFAS in contaminated liquid matrices. This study investigates the performance of a continuous flow HALT reactor for destroying PFAS in contaminated fire training pond water samples. The results show that HALT processing with sufficient NaOH loading can significantly destroy parent PFAS compounds faster than batch HALT processing, indicating its potential for practical applications in environmental site remediation activities.

CHEMOSPHERE (2023)

Article Engineering, Environmental

Perfluoroalkyl and Polyfluoroalkyl Substances in Groundwater Used as a Source of Drinking Water in the Eastern United States

Peter B. McMahon et al.

Summary: This study evaluated the occurrence of perfluoroalkyl and polyfluoroalkyl substances (PFAS) in groundwater used as a source of drinking water in the eastern United States. The results showed that 14 out of 24 PFAS were detected in the groundwater samples, with at least one PFAS detection found in 60% of public-supply wells and 20% of domestic wells. The study also identified several factors that were significantly associated with PFAS detections, such as tritium concentration, urban land use, and VOC and pharmaceutical concentrations.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2022)

Review Engineering, Chemical

Updated review on emerging technologies for PFAS contaminated water treatment

Sudesh Yadav et al.

Summary: Advances in treatment technologies for PFAS removal are rapid, but their efficiency and practicality need improvement. Successfully removing a certain level of PFAS calls for cautious implementation of long-term strategies. Emerging treatment technologies include ion exchange, adsorption, advanced oxidation, and membrane separation.

CHEMICAL ENGINEERING RESEARCH & DESIGN (2022)

Review Engineering, Environmental

Critical Review of Thermal Decomposition of Per- andPolyfluoroalkyl Substances: Mechanisms and Implications forThermal Treatment Processes

Junli Wang et al.

Summary: Per- and polyfluoroalkyl substances (PFASs) are a type of fluorinated organic chemicals that pose environmental and human health risks. Efficient and cost-effective treatment solutions are needed for remediation of PFAS contamination and waste streams with high concentrations of PFASs. Conventional and physical separation processes are not effective in defluorinating PFASs, and the degradation mechanisms and pathways of thermal treatment processes remain unclear. This review critically evaluates the thermal decomposition mechanisms, pathways, and byproducts of PFASs to improve the understanding and application of thermal treatment as an end-of-life process for PFAS destruction.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2022)

Article Engineering, Environmental

Application of Hydrothermal Alkaline Treatment for Destruction ofPer- and Polyfluoroalkyl Substances in Contaminated Groundwaterand Soil

Shilai Hao et al.

Summary: This study investigated the use of hydrothermal alkaline treatment (HALT) for the degradation of PFASs in groundwater and soil from AFFF-impacted sites. The results showed that HALT effectively degraded PFASs, with most of the identified PFASs being degraded to non-detectable levels within 90 minutes. However, the degradation of perfluoroalkyl sulfonates (PFSAs) was more challenging, especially for those with shorter chain lengths (n=3-5). The reaction rates in soil were slower compared to groundwater, possibly due to the soil's base-neutralizing properties.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2022)

Article Engineering, Environmental

Removal of per- and polyfluoroalkyl substances from contaminated groundwater by granular activated carbon and anion exchange resins: a pilot-scale comparative assessment

Charlie J. Liu et al.

Summary: This study evaluated and compared the adsorption of PFASs in contaminated groundwater using granular activated carbon (GAC) and anion exchange resins (AER). The results showed that AERs adsorbed 6-7 times more PFASs than GAC based on media mass or volume. However, when considering the same flowrate, AERs performed similarly to GAC for PFCAs and better for PFSAs. The study also assessed the operational costs of both treatment methods and found that AER and GAC could have similar costs if the ratio of AER to GAC unit media costs was around 3.5.

ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY (2022)

Review Environmental Sciences

Sequestration and potential release of PFAS from spent engineered sorbents

Melanie Kah et al.

Summary: PFAS have contaminated land and water worldwide, requiring remediation through sorption. It is important that spent sorbents loaded with PFAS are disposed of properly to prevent release of contaminants. The sorption and desorption processes of PFAS on engineered sorbents are complex and influenced by various factors.

SCIENCE OF THE TOTAL ENVIRONMENT (2021)

Article Engineering, Environmental

Hydrothermal Alkaline Treatment for Destruction of Per- and Polyfluoroalkyl Substances in Aqueous Film-Forming Foam

Shilai Hao et al.

Summary: The study investigated the hydrothermal alkaline treatment of PFASs in AFFFs, demonstrating rapid degradation of most PFASs, including per- and polyfluoroalkyl acids and precursors, when treated with an alkali at near-critical temperature and pressure. The findings suggest significant potential for the application of hydrothermal treatment technologies in managing PFAS waste streams.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2021)

Article Environmental Sciences

Perfluoroalkyl substances (PFAS) adsorption in drinking water by granular activated carbon: Influence of activated carbon and PFAS characteristics

Beatrice Cantoni et al.

Summary: The persistence of perfluoroalkyl substances (PFAS) in the environment leads to their presence in drinking water, posing a high concern for human health. Adsorption onto activated carbon (AC) has been identified as an effective technique for PFAS removal. The surface charge of AC was found to be the most important factor affecting adsorption performance, with positively-charged AC showing stronger adsorption capacities. Different types of AC demonstrated varied adsorption effects on different properties of PFAS in full-scale monitoring.

SCIENCE OF THE TOTAL ENVIRONMENT (2021)

Article Chemistry, Physical

Efficient Removal of Per- and Polyfluoroalkyl Substances from Water with Zirconium-Based Metal-Organic Frameworks

Rui Li et al.

Summary: The study demonstrates that the zirconium-based metal-organic framework NU-1000 shows exceptional adsorption capacities and ultrafast adsorption kinetics for PFASs, with equilibrium times of less than 1 minute. NU-1000 also exhibits excellent regeneration and reusability characteristics, with nearly quantitative removal and recovery rates after five consecutive adsorption and desorption cycles of PFAS. Adsorption testing using PFAS-contaminated groundwater samples shows impressive PFAS removal rates of 75-98% within 10 minutes, regardless of the presence of co-contaminants.

CHEMISTRY OF MATERIALS (2021)

Review Engineering, Environmental

Thermal Regeneration of Spent Granular Activated Carbon Presents an Opportunity to Break the Forever PFAS Cycle

Busra Sonmez Baghirzade et al.

Summary: Extensive use of PFAS has led to their presence in natural waters, and conventional methods for PFAS removal such as adsorption onto GAC may result in PFAS-laden waste streams. Inadequate disposal of PFAS-laden GAC can reintroduce PFAS into the aquatic cycle, highlighting the need for developing approaches for managing PFAS-laden GAC.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2021)

Article Engineering, Environmental

Removal of Per- and Polyfluoroalkyl Substances (PFASs) in Aqueous Film-Forming Foam (AFFF) Using Ion-Exchange and Nonionic Resins

Yida Fang et al.

Summary: In this study, adsorption of 75 PFASs in diluted AFFF mixture using different resins and GAC was investigated. The results showed that anion-exchange resins exhibited significant adsorption of PFASs compared to other resins and GAC, regardless of the PFAS charge. The study provides insights into the impact of resin properties on PFAS adsorption and guidelines for selecting resins to remove a wider range of PFASs.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2021)

Article Engineering, Environmental

PFAS treatment with granular activated carbon and ion exchange resin: Comparing chain length, empty bed contact time, and cost

Conner C. Murray et al.

Summary: Per- and polyfluoroalkyl substances (PFASs) are highly persistent chemicals with significant global environmental challenges. A study comparing the removal performance of granular activated carbon (GAC) and ion exchange resin (IX) for PFASs found that the length of PFAS chains and functional groups determine the mass transfer zone (MTZ) height and optimal empty bed contact times (EBCTs). Cost sensitivity analysis showed that IX was the most cost-effective adsorbent for removing both long and short chain PFASs compared to GAC.

JOURNAL OF WATER PROCESS ENGINEERING (2021)

Review Engineering, Environmental

Anion exchange resin removal of per- and polyfluoroalkyl substances (PFAS) from impacted water: A critical review

Treavor H. Boyer et al.

Summary: This paper critically reviews the available peer-reviewed literature on PFAS removal from water by anion exchange resin (AER), focusing on batch adsorption behavior, impact of water chemistry conditions, continuous-flow adsorption, adsorption modeling, regeneration, and weak-base AER. Future research priorities include improving the underlying science of PFAS-resin interactions, enhancing resin regeneration methods, and conducting comparative life cycle environmental and economic analyses for ion exchange treatment systems.

WATER RESEARCH (2021)

Article Engineering, Environmental

Degradation by hydrothermal liquefaction of fluoroalkylether compounds accumulated in cattails (Typha latifolia)

Weilan Zhang et al.

Summary: Per- and polyfluorinated substances with an ether bond are widely used to replace conventional PFAS, but their release into the environment poses risks. This study found that cattails can absorb and accumulate GenX, ADONA, and F-53B, with successful degradation of GenX and ADONA through hydrothermal liquefaction. F-53B, on the other hand, showed resistance to the treatment, but improved degradation with higher temperatures and positive catalytic effects from the cattail biomass.

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING (2021)

Article Engineering, Environmental

Thermal Stability and Decomposition of Perfluoroalkyl Substances on Spent Granular Activated Carbon

Feng Xiao et al.

ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS (2020)

Article Chemistry, Multidisciplinary

Destruction of Perfluoroalkyl Acids Accumulated in Typha latifolia through Hydrothermal Liquefaction

Weilan Zhang et al.

ACS SUSTAINABLE CHEMISTRY & ENGINEERING (2020)

Article Engineering, Environmental

Fate of per- and polyfluoroalkyl substances (PFAS) during hydrothermal liquefaction of municipal wastewater treatment sludge

Jie Yu et al.

ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY (2020)

Article Engineering, Environmental

Pilot scale removal of per- and polyfluoroalkyl substances and precursors from AFFF-impacted groundwater by granular activated carbon

Alix E. Rodowa et al.

ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY (2020)

Article Multidisciplinary Sciences

Early pregnancy serum levels of perfluoroalkyl substances and risk of preeclampsia in Swedish women

Sverre Wikstrom et al.

SCIENTIFIC REPORTS (2019)

Article Engineering, Environmental

Rapid Destruction and Defluorination of Perfluorooctanesulfonate by Alkaline Hydrothermal Reaction

Boran Wu et al.

ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS (2019)

Review Environmental Sciences

A review of the pathways of human exposure to poly- and perfluoroalkyl substances (PFASs) and present understanding of health effects

Elsie M. Sunderland et al.

JOURNAL OF EXPOSURE SCIENCE AND ENVIRONMENTAL EPIDEMIOLOGY (2019)

Article Environmental Sciences

Thermal mineralization behavior of PFOA, PFHxA, and PFOS during reactivation of granular activated carbon (GAC) in nitrogen atmosphere

Nobuhisa Watanabe et al.

ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH (2018)

Article Environmental Sciences

Hydrothermal treatment for regeneration of activated carbon loaded with organic micropollutants

Sarah Suehnholz et al.

SCIENCE OF THE TOTAL ENVIRONMENT (2018)

Article Engineering, Environmental

Ion exchange resin for PFAS removal and pilot test comparison to GAC

Steve Woodard et al.

REMEDIATION-THE JOURNAL OF ENVIRONMENTAL CLEANUP COSTS TECHNOLOGIES & TECHNIQUES (2017)

Article Environmental Sciences

Residual organic fluorinated compounds from thermal treatment of PFOA, PFHxA and PFOS adsorbed onto granular activated carbon (GAC)

Nobuhisa Watanabe et al.

JOURNAL OF MATERIAL CYCLES AND WASTE MANAGEMENT (2016)

Article Engineering, Environmental

Treatment of poly- and perfluoroalkyl substances in US full-scale water treatment systems

Timothy D. Appleman et al.

WATER RESEARCH (2014)

Article Environmental Sciences

Perfluorooctanoic Acid (PFOA) Exposures and Incident Cancers among Adults Living Near a Chemical Plant

Vaughn Barry et al.

ENVIRONMENTAL HEALTH PERSPECTIVES (2013)