A5063602008- Per- and polyfluoroalkyl substances research
- Pickering emulsions and particle stabilization
- Enzyme-mediated dye degradation
- Analytical chemistry methods development
- Toxic Organic Pollutants Impact
- Surfactants and Colloidal Systems
- Atmospheric chemistry and aerosols
University of California, Berkeley
2021-2023
The surfactant properties of perfluorooctanesulfonic acid (PFOS) impact its environmental behavior, especially under high-ionic strength conditions. We observed an apparent PFOS concentration decrease during bench-scale experiments simulating in situ chemical oxidation (ISCO) with heat-activated persulfate that could not be attributed to transformation. Using chloride salts Na+, K+, Mg2+, and Ca2+, we decreasing concentrations salt solutions. In solutions initially containing 10 mg/L PFOS,...
Fungi and laccase mediator systems (LMSs) have a proven track record of oxidizing recalcitrant organic compounds. There has been considerable interest in applying LMSs to the treatment perfluoroalkyl acids (PFAAs), class ubiquitous persistent environmental contaminants. Some laboratory experiments indicated modest losses PFAAs over extended periods, but there no clear demonstrations transformation mechanism or kinetics that would be needed for remediation applications. We set out determine...
Per- and polyfluoroalkyl substances (PFAS) exist in contaminated groundwater, surface water, soil, sediments from use of aqueous film forming foams (AFFFs). Under these conditions PFAS exhibit unusual behavior due to their surfactant properties, namely, aggregation activity. Environmental factors such as salinity can affect complicate efforts monitor PFAS. The effect high matrices on the critical micelle concentration (CMC) a AFFF formulation manufactured by 3M accumulation was assessed with...