Technology Innovation News Survey

U.S. Department of Homeland Security, U.S. Coast Guard, Log-9, Norfolk, VA
Contract Opportunities on SAM.gov 70Z08426RDL940001, 2025

This is a sources sought notice for marketing research purposes only under NAICS code 562910. The Coast Guard Director of Operational Logistics, Office of Procurement and Contracting, LOG-9, in Norfolk, Virginia, seeks to identify qualified sources interested in providing emergency response services for the containment, cleanup, and/or mitigation of the harmful effects of oil spills and hazardous substance incidents on or in waters subject to the jurisdiction of the United States, within the areas of responsibility of all U.S. Coast Guard Districts. The primary area of coverage will encompass the entire United States and its territories, including but not limited to Puerto Rico, the Virgin Islands, Guam, the Mariana Islands, and American Samoa. Responses are due by 2:00 PM EST on December 15, 2025. https://sam.gov/workspace/contract/opp/6c3fb9a9844043e4b9307b3559cd6a94/view

U.S Department of Energy, Environmental Management Consolidated Business Center, Cincinnati, OPH
Contract Opportunities on SAM.gov 89303326REM000150, 2025

This is a sources sought notice for market research purposes only. The U.S. Department of Energy seeks responses from qualified 8(a) small business concerns interested in its EM Field Sites Technical Assistance Contracts under NAICS code 562910, which encompass Administrative and Programmatic Support, Technical and Engineering Services, Environment, Safety, Health and Quality, Information and Data Systems, and Emergency and Security Program support. Environmental remediation services are required at multiple sites, including the EMCBC-New York Project Office (silver, mercury, and PCBs); the Energy Technology Engineering Center in Simi Valley, California (nuclear waste); the Hanford Site in Washington State (plutonium waste); Idaho National Laboratory (radioactive waste); Lawrence Berkeley National Laboratory "Old Town" Project in California (contaminated soil); Lawrence Livermore National Laboratory in Livermore, California (perchlorate contamination); the MOAB Uranium Mill Tailings Remedial Action (UMTRA) Project (uranium mill tailings); the Nevada National Security Site (low-level and mixed low-level radioactive waste); the Portsmouth, Ohio, and Paducah, Kentucky Gaseous Diffusion Plants (radioactive and hazardous materials); the Savannah River Site (legacy nuclear materials, spent nuclear fuel, and waste); the Waste Isolation Pilot Plant near Carlsbad, New Mexico (defense-related transuranic waste); and the West Valley Demonstration Project in western New York (low-level radioactive wastes). Capability statements are due 2:00 PM EST on December 18, 2025. https://sam.gov/workspace/contract/opp/04c0146bbc7f44d28a511d25e6e8eb29/view

U.S. Army Corps of Engineers, North Atlantic Engineer Division, New England District, Concord, MA
Contract Opportunities on SAM.gov W912WJ26RA001, 2025

When this solicitation is released sometime in December 2025, it will be competed as a total small business set-aside under NAICS code 562910. The U.S. Army Corps of Engineers (USACE) New England District intends to issue a solicitation for work at the W&L Superfund Site. The Site is a former electroplating facility that operated from 1940 to 2007. Since 2010, several environmental investigation and remediation activities have been performed at the site, including removal of W&L facility buildings and residual waste materials, excavation and disposal of contaminated site media, and installation of an engineered cover behind residences along Paulette Lane and North Avenue to prevent upwelling of chromium-contaminated groundwater to the ground surface and to prevent direct exposure to chromium-contaminated soil. A PRB was constructed on the downgradient edge of the cover, with the goal of using zerovalent iron (ZVI) to reduce hexavalent chromium (Cr[VI]) to the less toxic trivalent chromium in groundwater before it discharges into Bliss Brook southeast of the W&L property. The government intends to award a single Firm-Fixed Price (FFP) service contract set-aside for small businesses. There is no solicitation at this time. https://sam.gov/workspace/contract/opp/b87e75976c974794b979652c55ba1025/view

U.S. Army Corps of Engineers, Engineer Division Northwestern, Kansas City District, Kansas City, MO
Contract Opportunities on SAM.gov W912DQ26RA002, 2025

When this solicitation is released on or about December 15, 2025, it will be competed as a total small business set-aside under NAICS code 562910. The U.S. Army Corps of Engineers intends to issue a solicitation for a Single Award Task Order Contract (SATOC), Indefinite Delivery/Indefinite Quantity (IDIQ), to support remedial action efforts at the Welsbach/General Gas Mantle (GGM) Superfund Site in Camden County, New Jersey. The work will involve developing a streamlined response and flexible contracting vehicle for cost-effective soils remediation. Tasks may include, but are not limited to, design work, interim actions, remedial actions, short-term operation and maintenance, laboratory management, reporting, and any other activities necessary to implement the soils remedy at the Welsbach/GGM Site. This notice does not constitute a commitment by the Government to award a contract or to pay for any costs incurred in response to this notice. It should not be construed as a commitment for any purpose, and no response is requested at this time. There is no solicitation at this time. https://sam.gov/workspace/contract/opp/176dd2f0d41b4b8eb98387b8dbc7e518/view

Carlson, T.J., C.J. Zhang, A. Andrews, E. Olisa, S. Ganna, and W.S. Gallo.
Groundwater Monitoring & Remediation 45(4):74-86(2025)

Natural source zone depletion (NSZD) rates of LNAPL were estimated at a former refinery site in Central California. The site's complex hydrogeology, including a thick vadose zone, significant groundwater level fluctuations, and previous long-term remediation using a soil vapor extraction system and an air sparging system, created unique bioremediation conditions. The Single Stick Method for NSZD rate calculation was applied at the site. The method transforms real-time continuous temperature data from six locations over nine months into NSZD rates, and captures subsurface heating associated with NSZD and surface heating and cooling at each test well, eliminating the need for background corrections. Three distinct phases were observed in the vadose zone during the study: Phase 1-Post-Active Remediation (immediately after remediation system shutdown); Phase 2-Thermal Shift (3 months after remediation system shutdown); and Phase 3-Steady-State Thermal Conditions (6 months after remediation system shutdown). The study showed a transition from widespread elevated heat signals to thermal shifts, followed by stable thermal conditions. The sitewide average NSZD rate was estimated at 7,300 gal/acre/year during Phase 1, 3,500 gal/acre/year during Phase 2, and 2,700 gal/acre/year during Phase 3. Results underscore the importance of excluding early-stage data influenced by active remediation to avoid artificially high rates.

Saurette, E. | Pacific Northwest National Laboratory RemPlex seminar, 4-6 November, Richland, WA, 35 minutes, 2025

Historical disposal of radioactive wastes at the Chalk River Laboratory site resulted in legacy groundwater contamination, including a 90Sr plume that is currently discharging to an ecological receptor. A novel injectable permeable reactive barrier (PRB) was designed to passively remediate the plume. Traditional PRBs are installed perpendicular to the direction of groundwater flow by excavating and then emplacing reactive media in the aquifer, requiring that the contamination be near the ground surface. This installation method also requires dewatering and, subsequently, storage and treatment of large volumes of contaminated groundwater. Injectable PRBs are installed by injecting the reactive media into the aquifer over the depth interval where the contamination occurs. The benefits of this technique include that the amount of reactive material required is optimized, as only the contaminated areas need to be treated; removal of contaminated groundwater or aquifer sediments is not required; much greater depths are accessible; placement is adaptable and is not limited to a straight trench; and the ability to be installed around or underneath existing infrastructure. Injectable PRBs may also be a suitable countermeasure to intercept unexpected releases of contamination to groundwater systems from nuclear processing, power-generating, or disposal sites in both urban and remote locations, as they can be installed on demand. The design of the reactive medium and the injectable PRB installed at the Chalk River Laboratory is discussed, including preliminary field results and lessons learned.
Slides: https://www.pnnl.gov/sites/default/files/media/file/2025%20RemPlex%20-%20Day%203%20-%20Lunch%20Program%20-%20Emily%20Saurette%20-%20Injectable%20Barrier%20at%20CRL.pdf
Longer Abstract: https://www.pnnl.gov/projects/remplex/2025-summit/catered-lunch-programs#day-3

French, K. ǀ RemTech 2025: Remediation Technologies Symposium, 15-17 October, Banff, Alberta, Canada, 21 slides, 2025

This talk presented three case studies from Alaska and California demonstrating the efficacy of microbial remediation of petroleum and PFAS at petroleum sites. At a site in Fairbanks, Alaska, >90% of petroleum hydrocarbons were removed with a single application of Bluum Helios, achieving remediation goals within one year. At a former oil refinery in Northern California, PAH levels were reduced by >65%, from an average of 6,590 ± 890 ppm (mg/kg) in the control to 2,280 ± 650 ppm in the treated plots in a three-month pilot. At two refineries in Northern California, petroleum and PFAS were co-treated with Bluum Helios and Delta, demonstrating for the first time microbial remediation of up to 98% of PFAS and 86% of petroleum hydrocarbons simultaneously. The presentation also covers work treating PFAS-impacted industrial groundwater, as many petroleum industrial sites may face increasing regulation in this area. These case studies indicate that bioremediation can be a cost-effective way of achieving remediation goals on large sites without the need for dig and haul or pump and treat systems.
Slides: https://esaa.org/wp-content/uploads/2025/10/KATHERINE-FRENCH.pdf
Longer Abstract: https://esaa.org/wp-content/uploads/2025/09/RT2025-program-Abstracts_13.pdf

EPA Tools & Resources Webinar, October 2025

This presentation describes the development of Appendix A of EPA's Interim Guidance on the Destruction and Disposal of PFAS and Materials Containing PFAS (2024), and its use to evaluate thermal treatment technologies, including results of an evaluation of a full-scale hazardous waste incinerator to evaluate air emissions and the effectiveness of incineration. Results show promise for both incineration and the ability to conduct a comprehensive characterization of a full-scale hazardous waste incinerator. https://www.epa.gov/system/files/documents/2025-11/hwi-pfas-testing_october-webinar_508-compliant.pdf

Braekevelt, S., A.R. Ottosen, P.H. Nielsen, C.E. Flyger, and D. Harrekilde. AquaConSoil 2025, 16-20 June, Lieve, Belgium, abstract only, 2025

PFAS levels analyzed in the wastewater discharged from the Odense Nordvest Treatment Plant (ONVR) into Odense Fjord showed a PFOA concentration of 0.039 µg/l, significantly higher than the 0.0044 µg/l environmental water standard. Because the ONVR plant receives leachate from the Odense landfill, a study was conducted to investigate the impact and mitigation of the upstream activity. The landfill's PFAS contributions were mapped, confirming it as the primary PFAS source to ONVR. Total Oxidizable Perfluoroalkyl Precursors (TOP) analyses were conducted on leachate and wastewater at the plant's inflow and outflow points. The mapping report indicated that landfill leachate accounts for 80-85% of the total PFAS content in ONVR's influent wastewater. Some sections of the landfill showed notably higher PFAS levels, with leachate particularly high in compounds like PFBA, PFBS, and PFHxA. Additional TOP analyses showed that standard PFAS testing detected most PFAS compounds present in the leachate and influent wastewater at ONVR. Various PFAS treatment technologies were tested at lab and pilot-scale at the ONVR treatment plant to explore the removal efficiency of heavy metals, selected contaminants, and the reduction of nitrification inhibition. The project trialed flocculation, foam fractionation, ion exchange, and photo-active reductive fluorination to develop a feasible treatment solution, focusing on effective removal of short-chain PFAS. Based on these tests, operational and capital cost estimates are being prepared for a PFAS treatment facility to address PFAS in Odense's landfill leachate. Additional funding has enabled the project to investigate removal rates for select heavy metals and other environmental pollutants, as well as effects on nitrification inhibition. See final report (summary available in English) https://vudp.dk/CustomerData/Files/Folders/16-filer/390_2023-53-odense-nord-miljøcenter-slutrapport.pdf

Dennis, P., T. Key, C. Toth, E. Edwards, and M. Schoeppic. ǀ RemTech 2025: Remediation Technologies Symposium, 15-17 October, Banff, Alberta, Canada, 22 slides, 2025

Field-scale biosparging resulted in sulfolane biodegradation to below criteria at a former gas plant. To confirm and understand the observed decreases in sulfolane concentrations, multiple lines of evidence were employed, including traditional site data combined with culture-based techniques, and molecular biological tools to enrich, identify, and assess microbial sulfolane-degraders. A multi-year study to characterize sulfolane degraders in site groundwater included propagating sulfolane degraders from groundwater on a microbial growth media containing sulfolane, and 16S rRNA amplicon sequencing to characterize the culture's microbial community and to assess changes due to varying sulfolane concentrations. Culture-based methods were used to isolate putative sulfolane degraders, and genomics and proteomics were used in biomarker discovery, specifically identifying genes and proteins integral to sulfolane degradation. An enrichment culture (SC25) capable of degrading sulfolane was developed from site groundwater. 16SrRNA gene amplicon sequencing and quantitative polymerase chain reaction (qPCR) indicated a novel Rhodococcus, strain SC25, as the dominant microbe in the enrichment culture, and its abundance was correlated with sulfolane biodegradation. Multiple lines of evidence suggest that strain SC25 represents a novel aerobic sulfolane degrader belonging to the phylum Actinomycetota, differentiating it from other reported sulfolane degraders belonging to the Proteobacteria. A putative novel sulfolane monooxygenase (SMO) gene associated with Rhodococcus was identified using proteomics and genomics. The novel SMO was used to develop a quantitative PCR (qPCR) test that was applied to groundwater samples. The qPCR test results indicated that the SMO was most prevalent in the source area and the biosparge zone, which had higher sulfolane concentrations, and was less prevalent in areas near the plume fringe, where sulfolane concentrations were lower. These data suggest that Rhodococcus harbors the SMO and may be involved in sulfolane degradation at the site.
Slides: https://esaa.org/wp-content/uploads/2025/10/PHIL-DENNIS.pdf
Longer Abstract: https://esaa.org/wp-content/uploads/2025/09/RT2025-program-Abstracts_32.pdf

Zimmerman, J.H., A. Williams, B. Schumacher, C. Lutes, R. Warrier, L. Levy, G. Buckley, B. Cosky, C. Holton, and K. Bronstein. Indoor Air 2025:860696(2025)

Subslab soil gas (SSSG) samples were collected from six commercial buildings in Fairbanks, Alaska, and a large, compartmentalized warehouse at a coastal site in Virginia to explore variability in SSSG sampling and assess how many samples are needed. Types of samples collected included indoor air; outdoor air; SSSG; soil gas; radon; differential pressure; indoor and outdoor temperature; heating, ventilation, and air conditioning (HVAC) parameters; and other environmental factors. The temporal and spatial variabilities of the results observed at the test sites were used as a "similar population" to estimate necessary sample sizes for characterization of VI levels and to explore how temporal and spatial factors may influence estimates. The estimated SSSG sample requirement ranged from 1 to 80 samples, showing the substantial sensitivity of the systematic project planning equation to cases in which the action level and the average concentration are similar. It is recommended that the estimated number of samples generated from the collected data for the buildings should only be used as a starting point for planning purposes. The number of samples to initially collect at a large building to characterize VI can be calculated, but the actual number should include adjustments for features of a building (e.g., past usage, separate foundations, and footers) and conditions at a site (e.g., proximity to source and depth to groundwater) that may alter the required number of SSSG samples. https://onlinelibrary.wiley.com/doi/epdf/10.1155/ina/2860696

Siciliano, S. ǀ RemTech 2025: Remediation Technologies Symposium, 15-17 October, Banff, Alberta, Canada, 21 slides, 2025

A technology stack was developed that can make an initial ModFlow estimate based on historical data and then update that estimate monthly based on sensor input. Typically, each site would receive 7,200 new estimates of groundwater monthly. Using these sensor inputs, a Kalman filter technique was used to update the ModFlow parameters and assimilate this new data with existing model predictions. Anonymized data and the resulting model predictions were then applied across 29 sites and 5 million data points. Plume stability and persistence varied among four approaches: Mann-Kendall (MK), Spatial-Temporal Splines (ST), Historical ModFlow (HM), and Sensor ModFlow (SM). STs were more effective in detecting plume dynamics than MK analysis. Furthermore, HM typically overestimated plume velocity and plume persistence. ModFlow with sensor data, assimilated into the model, SM, demonstrated greatly reduced plume velocity and persistence compared to using only historical data. Model certainty also increased dramatically as sensor data was assimilated, dramatically decreasing extreme model outcomes. Results indicate that traditional methods of estimating plume stability in the tight clay regions of Western Canada likely overestimate plume velocity, and approaches using sensor data provide models that are more reflective of actual site conditions.
Slides: https://esaa.org/wp-content/uploads/2025/10/STEVEN-SICILIANO.pdf
Longer Abstract: https://esaa.org/wp-content/uploads/2025/09/RT2025-program-Abstracts_27.pdf

Driscoll, S.K., S. Ryan, A. Small, and F. Dombrowski.
Environmental Toxicology and Chemistry 13:vgaf186(2025)

A case study is presented on the use of site-specific sediment toxicity data as a line of evidence to develop preliminary remediation goals (PRGs) to protect the community of benthic invertebrates in sediments of the Upper Fox River adjacent to a former manufactured gas plant (MGP). Standard 28-day lab toxicity tests with Hyalella Azteca were conducted. Various exposure metrics were examined to determine which metrics best predicted toxicity. Metrics included TPAH13 and TPAH34 concentrations in sediment (with and without normalization to organic carbon), toxic units (TU) estimated from concentrations of 34 PAHs measured in sediment, and TU estimated from 34 PAHs measured in porewater using passive samplers (with and without organoclay to avoid fouling of passive samplers). Exposure-response models were used to evaluate the relationships between the various exposure metrics and toxicological responses. All the exposure metrics provided relatively good fits of models to data and were used to calculate effect concentrations (EC20) predicted to cause a 20% reduction in the endpoint (e.g., survival and biomass). The EC20 value of 119 mg/kg TPAH13 was selected for future use as a conservative and protective line of evidence to describe the nature and extent of MGP impacts at the site.

Araujo, S.P., L. Lomheim, S.P.Q. Kraus, E.E. Mack, J.C. Spain, S. Gavazza, and E.A. Edwards.
Environmental Science & Technology 59(29):15251-15260(2025)

Inocula from an industrial site in northeast Brazil were used to investigate the potential for bioremediation of dichloroanilines (2,3- and 3,4-DCA) and dichloronitrobenzenes (3,4-, 2,5-, and 2,3-DCNB). Anaerobic biotransformation was observed in microcosms simulating site conditions, particularly when an electron donor was added. To disentangle specific transformation reactions, subcultures from active anaerobic microcosms were enriched with individual DCA or DCNB isomers. DCNB isomers were reduced to the corresponding DCA, which were stoichiometrically dechlorinated to the corresponding monochloroaniline (CA) isomers in single-compound enrichment cultures. Further dechlorination of CA to aniline was noted. The reduction of DCNB to DCA was sustained by known fermenters and possibly Desulfitobacterium, while Dehalobacter was clearly responsible for the dechlorination of DCAs. Findings helped attribute function to the microbial community data retrieved from field samples, improving the conceptual site model and enabling the identification of bioactive zones and rate-limiting conditions at a complex site. The data broaden the understanding of the metabolic repertoire of Dehalobacter and provide a model for incorporating microbial community data into site remediation efforts.

Zhang, M., Y. Liu, S. Hu, D. Wu, L. Zheng, H. Liu, and J. Dong
Water Research 268(Part B):122698(2025)

A novel approach is proposed for remediating multi-NAPL-contaminated groundwater that leverages phase transfer catalysis (PTC) to enhance heterogeneous mass transfer by transferring oxidants from groundwater to NAPLs. Oxidation in situ activation is achieved through bifunctional oxidation using permanganate and peroxymonosulfate (PP), referred to as PTC-PP. TCE and benzene served as a representative multi-NAPL system. PP significantly improved the degradation efficiency of benzene in a multi-NAPL system by at least 60.8% compared to single-oxidant systems, and further enhancement (17.6%) was achieved when PP was combined with PTC compared to PP alone. Dissolved Mn(II) and MnO2 generated by MnO4- reduction effectively activated peroxymonosulfate in the PTC-PP system, with colloidal MnO2 being the most effective activator. SO₄^•-, O₂^•- , and ¹O₂ were formed in both NAPL and aqueous phases, while ^•OH was formed in the aqueous phase, playing a crucial role in benzene oxidation. In the phase transfer process of PTC-PP, the proportion of MnO4- transferred to benzene exceeded the proportion transferred to TCE. Findings showed that nondirectional phase transfer of oxidants posed a challenge for simultaneous promotion of TCE and benzene degradation. However, TCE and benzene removal efficiencies were both >75.7 % by applying peroxymonosulfate after KMnO₄ addition.

Yang, S.-Y., C.-Y. Lai, and H.-P. Zhao. | Journal of Hazardous Materials 484:136743(2025)

A study constructed five one-dimensional columns, each operated for different time periods (28, 42, 56, 84, and 138 days), to explore spatial and temporal dechlorination patterns using electrokinetic-enhanced bioremediation (EK-BIO). Continuous TCE degradation was achieved, with 46.52% TCE recovery. Prolonged electrokinetic operation accelerated the first-step dehalogenation (TCE to DCE). Although Dehalococcoides was widespread at 138 days (2.30-5.74%), oxygen exposure led to irreversible damage, necessitating secondary inoculation. The presence of aerobic bacteria (Comamonas and Pseudomonas) suggested the formation of aerobic detoxification pathways in electrode chambers. Gene expression analysis (tceA, vcrA, and Dhc16S) further confirmed the loss of DCE to ethene dehalogenation over time. Findings demonstrate that secondary inoculation and alternative aerobic pathways can sustain long-term biodegradation in the EK-BIO system.

Lim-Ortega, J.K.T., C. Liang, A.P. Rollon, and M.D.G. De Luna.
ACS Environmental Au 5:211-219(2025)

A study investigated in situ chemical oxidation (ISCO) using a sodium persulfate sustained release rod (SPS SR-rod) to remediate TCE in a low-permeability zone (LPZ) within a 2D sand tank. The tank simulated a dual-permeability porous medium with hydraulic gradients of 0.01 and 0.05. The SPS SR-rod within the LPZ released an average sodium persulfate (SPS) concentration of ∼625 mg/L laterally, with initial peak concentrations of 7,000-10,000 mg/L. When the rod was placed atop the LPZ, lower SPS concentrations were observed compared to placement within the LPZ. A separate evaluation of both SPS SR-rod placements in a 2D sand tank injected with pure TCE tested the oxidant's ability to address soil-sorbed TCE. The rod atop the LPZ can mitigate dual permeability layers and create a depletion zone in the high-permeability zone to reduce contaminant transport from the LPZ. The rod within the LPZ reduces TCE lateral dispersion. The persistence and slow release of SPS in the LPZ suggest that the SPS SR-rod could effectively extend the time of ISCO remediation of low-concentration TCE in the LPZ and the surrounding environment. https://pmc.ncbi.nlm.nih.gov/articles/PMC11926746/pdf/vg4c00097.pdf

Man, J.H.K., Z. Zheng, X. Wang, H.Y.M. Cheung, Z. Xu, J.J. Calvillo Solis, and I.M.C. Lo.
Environmental Science & Technology 59(40):21401-21420(2025)

The physicochemical properties of carbonaceous materials, their roles in different PFAS degradation technologies, and challenges for real-world applications are reviewed in this article. Tailored hydrophobicity, surface functionalization, and porosity in carbonaceous materials significantly improve PFAS adsorption, and the rapid charge transfer and generation of charge carriers enable catalytic activity for PFAS degradation. However, limited material stability during application, interference from complex water matrices, toxicity from material leaching, PFAS degradation intermediates, and chemical additives, along with limited system expandability, remain key challenges.

Divine, C., S. Justicia-Leon, D. Taggart, and S. Rosolina.
Groundwater Monitoring & Remediation 45(4):17-27(2025)

This article explores the practical applications, limitations, and future potential of newer tools, such as quantitative polymerase chain reaction (qPCR), metagenomics, proteomics, metabolomics, and stable isotope analyses, in environmental remediation, with a focus on translating molecular data into actionable insights. A practical summary of the key points and implications is provided in the form of frequently asked questions in the closing section.

Jordan, E. ǀ PFAS Forum V, 9-11 April, Orlando, FL, 18 minutes, 2025

This presentation introduces Rapid Small-Scale Column Tests (RSSCTs) as a powerful tool for optimizing and evaluating PFAS treatment media and strategies. RSSCTs offer a streamlined alternative to traditional pilot-scale testing, allowing for rapid assessment of various adsorbent media, including granular activated carbon, ion exchange resins, FluoroSorb organoclay, and emerging novel materials. The presentation outlines the key principles of RSSCT design and operation, emphasizing how the tests maintain scalability to full-size systems while significantly reducing time and resource requirements. The discussion covers the critical parameters evaluated through RSSCTs, such as PFAS removal efficiency, breakthrough curves, and media-specific adsorption capacities. The tests enable simultaneous comparison of multiple media types under controlled conditions, facilitating data-driven selection of the most effective treatment solutions for specific PFAS profiles. The presentation also addresses the practical implications of RSSCT results, including their role in predicting full-scale system performance, estimating media lifespan, and optimizing treatment system design. Real-world applications and case studies illustrate how RSSCTs can significantly enhance the efficiency and cost-effectiveness of PFAS remediation efforts. https://www.youtube.com/watch?v=hf0Z1cs6mJY&list=PLYW8x4mEadkvXQ-ttPfXaadoPU5Sv_Wvs&index=23

Obal, T. ǀ RemTech 2025: Remediation Technologies Symposium, 15-17 October, Banff, Alberta, Canada, 18 slides, 2025

Currently, there is a significant information gap regarding the sources, occurrence, and fate of ultrashort PFAS (chain length of 3 or fewer carbons). Known sources of environmental impact by ultrashort PFAS include trifluoroacetic acid (TFA) arising from atmospheric degradation of hydrofluorocarbons and the oxidation and chain shortening of fluorotelomer compounds. Current lab methods used to determine short and long-chain PFAS do not typically analyze for ultrashort PFAS, necessitating new and/or modified measurement approaches. New measurement tools for ultrashort PFAS are discussed, highlighting their ability to identify and quantify ultrashorts as an important source of PFAS in the environment, as well as their potential application in forensic evaluations of PFAS sources using the total oxidizable precursors assay. The development and validation of an isotope dilution ultra-high-pressure liquid chromatography tandem mass spectrometry method for the measurement of five ultrashort PFAS: TFA, perfluoropropionic acid (PFPrA), perfluoromethanesulfonic acid (PFMS), perfluoroethanesulfonic acid (PFEtS), and perfluoropropanesulfonic acid (PFPrS) in aqueous samples are described. Reporting limits for the method range from 1-20 ng/L. Application of this method affords the data user an expanded list of TOPs assay target compounds and continues to close the mass balance on fluorotelomeroxidation.
Slides: https://esaa.org/wp-content/uploads/2025/10/TERRY-OBAL.pdf
Longer Abstract: https://esaa.org/wp-content/uploads/2025/09/RT2025-program-Abstracts_4.pdf

Hussain, H.N., M.I. Jilani, F. Imtiaz, T. Ahmed, M.B. Arshad, M. Mudassar, and M.N. Sharif.
Green Analytical Chemistry 12:100225(2025)

This review presents the hypothesis that adsorption offers a scalable and cost-effective approach for PFAS remediation. Using advanced adsorbent materials, it evaluates the efficiency of adsorption technologies and their applicability to real-world scenarios. Results demonstrate the potential of novel adsorbents to achieve high PFAS removal rates while minimizing secondary contamination risks. The study concludes that aligning these solutions with evolving environmental regulations and assessing their cost and scalability are vital for tackling PFAS pollution effectively. The research contributes actionable insights to the development of sustainable PFAS management strategies, addressing critical gaps in large-scale applications.