Showing 901-915 of 1266
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Limit PFAS in bottled water, US senators tell the FDA
Policy
1 Jun 2021
Eleven US Senators are asking the US FDA to set a federal limit on PFAS allowable in bottled water.
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Concentrations and human exposure assessment of per and polyfluoroalkyl substances in farmed marine shellfish in South Africa
Science
1 Jun 2021 | Chemosphere
Short-chain PFAS were more prevalent than long-chain PFAS in farmed shellfish.
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Heterogeneous photooxidation of 6:2 polyfluoroalkyl phosphoric acid diester on dust mineral components under simulated sunlight and the influence of relative humidity and oxygen
Science
1 Jun 2021 | Chemosphere
DiPAP may account for additional PFCA sources in both indoor and outdoor environments and the heterogeneous degradation pathways were different from those of volatile fluorotelomer alcohols.
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Unsaturated PFOS and Other PFASs in Human Serum and Drinking Water from an AFFF-Impacted Community.
Science
31 May 2021 | Environ Sci Technol
PFAS exposure levels decreased over time for all PFAS except PFPeS.
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‘Forever chemicals’ found in home fertilizer made from sewage sludge
News
28 May 2021 | The Guardian
Sewage sludge that wastewater treatment districts across America package and sell as home fertilizer contain alarming levels of toxic PFAS, also known as “forever chemicals”, a new report has revealed.
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High Levels of Legacy and Emerging Contaminants in Killer Whales (Orcinus orca) from Norway, 2015 to 2017
Science
26 May 2021 | Environ Toxicol Chem
PFAS was found in higher levels in adult orcas than offspring, suggesting less efficient maternal transfer.
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Source allocation of per- and polyfluoroalkyl substances (PFAS) with supervised machine learning: Classification performance and the role of feature selection in an expanded dataset
Science
24 May 2021 | Chemosphere
Supervised machine learning based on composition can identify patterns that can be used to distinguish PFAS sources.
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FluoroMatch 2.0-making automated and comprehensive non-targeted PFAS annotation a reality
Science
24 May 2021 | Anal Bioanal Chem
Using the newly developed FluoroMatch Flow 2 software, 1,000 individual PFAS were found in firefighting foam, including previously undescribed compounds.
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Method Development and Validation of Per- and Polyfluoroalkyl Substances in Foods from FDA's Total Diet Study Program
Science
19 May 2021 | J Agric Food Chem
A PFAS detection method was validated for use in a wide variety of foods and found positive detects of PFOS in meat samples.
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Environmental Source Tracking of Per- and Polyfluoroalkyl Substances within a Forensic Context: Current and Future Techniques
Science
18 May 2021 | Environ Sci Technol .
In this perspective, we identify the current tools available and principal developments necessary to enable greater confidence in environmental source tracking to identify and apportion PFAS sources.
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PFAS and their substitutes in groundwater: Occurrence, transformation and remediation
Science
11 May 2021 | J Hazard Mater
GenX, F-53B, and OBS in groundwater treatment by UV/sulfite system and electrochemical oxidation proved effective.
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Release of soil colloids during flow interruption increases the pore-water PFAS concentration in saturated soil
Science
11 May 2021 | Env Poll
Removal of colloids from water samples can underestimate PFAS concentration.
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Occurrence, profiles, and ecotoxicity of poly- and perfluoroalkyl substances and their alternatives in global apex predators: A critical review
Science
11 May 2021 | J of Env Sci
PFOS was the dominant PFAS found in the top predators, followed by PFUnDA, and the proportions of odd C-chain length PFCAs were higher than adjacent even C-chain length PFCAs.
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Significant Reductive Transformation of 6:2 Chlorinated Polyfluorooctane Ether Sulfonate to Form Hydrogen-Substituted Polyfluorooctane Ether Sulfonate and Their Toxicokinetics in Male Sprague-Dawley Rats
Science
11 May 2021 | Environ Sci Technol
The toxicokinetic properties determined for 6:2 Cl-PFESA and 6:2 H-PFESA in blood and urine were found to be structure and dose-dependent.
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The Case for Direct Measures of Soil-to-Groundwater Contaminant Mass Discharge at AFFF-Impacted Sites
Science
4 May 2021 | Environ Sci Technol
This perspective provides a rationale for why alternative approaches are critically necessary and proposes a practical solution to accurately assess PFAS transport within unsaturated vadose zone soils.