Ryan Catling’s Post

Interesting article in Nature about an important topic: degradation of PFAS using photoelectrochemistry https://lnkd.in/dUJKTAAh

A new study by the USGS estimates that up to 95 million Americans could be relying on groundwater containing detectable levels of #PFAS. USGS scientists have provided the first national estimates of PFAS in untreated groundwater serving public and private wells. This groundbreaking research also highlights the estimated number of individuals nationwide who could be impacted by groundwater contaminated with PFAS. (https://okt.to/rkLpH1) Looking for more insights on PFAS? Check out our free #whitepaper: https://okt.to/rdxOkI #PFAStesting #ForeverChemicals #ScienceForaSaferWorld

NEW PUBLICATION: CLEAR Co-MPI and Project 1 Co-I Carol Miller and Project 3 Lead Tracie Baker have new research out that examined #PFAS contamination in Great Lakes urban watersheds. Key Highlights: • Higher PFAS burdens are found in tributaries compared to receiving waters. • 92-PFAS LC-MS method quantified novel congeners not previously reported this region. • Rouge River watershed greatly contributes to PFAS burden in Huron Erie corridor. • PFHxA was the PFAS with the highest cumulative concentration in all water samples. • Legacy PFOS and PFOA persist in sediment and water in the HEC. https://lnkd.in/ePpkS8CW

USEPA UPDATE The USEPA has updated their Regional Screening Levels (RSLs). RSLs are generally used to determine if more study is needed. If the RSL is exceeded, a risk assessment study may be required. However, RSLs are not cleanup standards. There are a number of updates, including to several PFAS species. Lead has a new screening level in residential soils. Victor Medina https://lnkd.in/eaR2HdWJ

Have you seen the latest study by the USGS that could affect 95 million Americans? Groundwater resources are vital to our environment and the fact that they are impacted with PFAS is a growing concern that REGENESIS Remediation Solutions can quickly help address using a sustainable, proven approach in situ with patented advanced colloidal activated carbon technologies. Thank ou Kelsey Iocoangeli for bringing this data to light! #pfastreatment #foreverchemicals #protectgroundwater #waterresources

Study: PFAS building up in 3 of 5 Great Lakes

This recent PFAS modelling study demonstrates that WWTWs are responsible for < 50% of the PFAS transported in the River Mersey with the majority coming from unknown sources. This highlights the need for more temporally and spatially variable mass loading data in freshwater catchments to enable the identification of these other sources of PFAS.

Are we doing enough to address PFAS contamination in the Great Lakes? In a recent study, researchers collected and analyzed precipitation, air, and water samples from five sites around the Great Lakes between 2021 and 2023, measuring 41 per- and polyfluoroalkyl substances (PFAS). The average concentration of total PFAS (Σ41PFAS) in atmospheric precipitation ranged from 2.4 to 4.5 ng/L across the sites. In lake water, the highest average concentration was in Lake Ontario at 11 ng/L, while the lowest was in Lake Superior at 1.3 ng/L. Air samples showed the highest average PFAS concentration in Cleveland at 410 pg/m3 and the lowest in Sleeping Bear Dunes at 146 pg/m3. The study highlighted that atmospheric deposition is a significant source of PFAS, particularly for Lake Superior. https://lnkd.in/degnumNh Funding innovative research into new enzyme-based bioremediation methods for PFAS is critical, as I have emphasized in previous posts. These could be a game changer in eliminating these dangerous contaminants from the environment, especially water. If you care about this issue, please support ASPIDIA's efforts! #pfas #foreverchemicals #cleanwaters #health #bioremediation #enzymes

Always nice to see our labs' work on such impactful studies! The San Francisco Estuary Institute and Bay Area Clean Water Agencies Phase II Report on #PFAS in San Francisco Bay Area wastewater treatment plants (WWTPs or POTWs) is out, and it is rich with insight on 1633, TOP and 1621 adsorbable organic fluorine (AOF) data. The PFAS analytical work was done by #SGS out of our #AXYS lab. I was especially interested in the AOF results and they appear to reveal yet more uncharacterized mass than even TOP. "Effluent AOF results were 45-250 times greater than the corresponding TOP analysis" - Not expecting that!! Read the study here https://lnkd.in/geQMWz-j

PFAS compounds are found in all five US Great Lakes. The three northernmost lakes are accumulating PFAS, while the two southern lakes (Erie and Ontario) are seeing decreasing concentrations: https://lnkd.in/eM5HG5S8