Researchers at the University of Bath have published a report in Chemical Engineering Journal about a method that removes at least 75% of perfluorooctanoic acid (PFOA) from water using ceramic-infused lattices (or ‘monoliths’). PFOA is one of the two commonest perfluoroalkyl and polyfluoroalkyl substances (PFAS). These are under increasing scrutiny as ‘forever chemicals’ that take hundreds of years to degrade and are linked to health issues like harm to reproductive, developmental and cardiovascular systems.

The US Environmental Protection Agency (EPA) has taken two separate actions on per- and polyfluorinated substances (PFAS), both being part of its PFAS strategic roadmap, which aims to implement legislation by Q4 to reduce and destroy PFAS contamination in water, air and soil.

Under the National Primary Drinking Water Regulation, the agency has laid down new standards with legally enforceable maximum contaminant levels (MCLs) on five individual PFAS. These are more stringent than previously mooted limits:

Chemours, DuPont and Corteva have reached an agreement in principle to resolve all per- and polyfluoroalkyl substance (PFAS)-related drinking water claims of a defined class of public water systems that serve “the vast majority of the US population”. They will pay about $592 million, $400 million and $193 million respectively into a settlement fund by 12 June.

The American Chemistry Council (ACC) has filed a petition in DC Circuit Court challenging the EPA’s Lifetime Health Advisories (LHAs) for perfluorooctanoic acid (PFOA, above) and perfluorooctane sulfonate (PFOS). These are both part of the much-maligned wider group of perfluoroalkyl and polyfluoroalkyl substances (PFAS).

DuPont, its spin-off company Chemours, and Corteva, which unites DuPont’s and Dow’s former agrochemicals businesses, have agreed a settlement on all legal disputes concerning per- and polyfluoroalkyl substances (PFAS) arising out of the spin-off of Chemours in 2015.

The first step in ongoing litigation in the US between Chemours and its parent firm DuPont over the cost of environmental liabilities relating to historic pollution caused by per- and polyfluoroalkyl substances (PFASs) went DuPont’s way on 2 April. Chemours has said that it will appeal to the Delaware Supreme Court.