As far as PFAS exposure goes, the Government of Canada is also taking a closer look. Health Canada has released a draft objective that says the summed total of all PFAS measured in drinking water should not exceed 30 nanograms per liter (ng/L). While the country hasn’t yet updated its...
A possible reason is their exceptionally strong acidity with pKa < 1. Nevertheless, at the best modified ACF material (DeCACF) the sorption coefficients (Kd) for PFOA and perfluorooctylsulfonic acid (PFOS) at environmentally relevant concentrations reach the range of 107 L/kg which is outstanding...
“In many instances, it is not the approach as much as it is the specific studies and endpoints used and the risk assumptions applied that you have differences between groups,” he said. “The NJDWQI gains its strength by having a diverse group of experts working on a single compound. The...
The only AFFF products currently available in North America that meet the MIL-SPEC contain PFAS. As environmental concerns associated with two particular PFAS compounds (perfluorooctane sulfonic acid [PFOS] and perfluorooctanoic acid [PFOA]) were identified and U.S. EPA issued new regulations regarding...
Bill of materials (BoM) analyzer Once it is determined that a product contains PFAS, companies will need to find replacement materials. Replacing a material in a product isn’t as easy as it sounds — the material has to meet certain economic and performance requirements — mechanical, thermal...
UF 25-39% Perfluorooctanoic acid, Perfluorooctanesulfonic acid • Type of sewage: Synthetic wastewater Lake water • PVDF • Hollow fibre (Pramanik et al., 2017) UF 17-76% Bisphenol A, 17α-ethynyl, Estrone 17β-estradiol, Estriol • Flat sheet • PVDF • Type of sewage: Synthet...
Some fluorinated chemicals (such as PFOS, perfluorooctane sulfonic acid) were restricted under the original proposals and subsequent revisions, but the effects on PVDF membranes were limited. However, a dramatic new development proposes to extend the chemicals covered by REACH to include all PFAS compo...
Timeline of production, commercialization and legislation of PFSAs.POSF (perfluorooctane sulfonyl fluoride) is the major raw material used to manufacture PFOS. Red flags represent events and actions that may have resulted in increased concentrations in the environment. Green flags represent important find...
While the U.S. EPA does not have any formal regulations that limit the presence of perfluorooctanoic acid (PFOA) or perfluorooctanesulfonic acid (PFOS), the two primary PFCs found in drinking water, the agency has issued ahealth advisoryintended to guide utilities on just how dangerous they can...
Why is it Nasty? Aerosols are made to quickly and effectively disperse liquids into the air. If those liquid products contain toxins, the chemicals are vaporized and become easy to inhale. Repeated exposure to toxic aerosols can damage the nervous system or irritate the skin and lungs, depending...