Рузвелтова 1а, Београд Зграда Завода за физику
officeih@grf.bg.ac.rs
011/321-8530 , 011/337-0206
Prof. Denis O'Carroll sa Univerziteta u Novom Južnom Velsu, Australija, će održati predavanje u sredu 17.04. u 13:30 na Građevinskom fakultetu, u sali 141: PFAS IN OUR SURFACE AND GROUNDWATERS & HOW INTERFACES GOVERN THEIR FATE Abstrakt predavanje je u nastavku: Per- and polyfluoroalkyl substances (PFAS) are emerging contaminants that have been used extensively as firefighting agents and in a wide range of commercial applications around the world. However, concerns related to PFAS (eco)toxicity have only become widely known in the last 25 years. Passage of PFAS regulations and advisories has now proceeded at a much quicker rate than for many groups of anthropogenic chemicals, with the breadth of PFAS subject to regulation continually increasing and deemed acceptable levels continually decreasing. This study will present the extent to which PFAS water concentrations exceed drinking water advisories and regulations globally (e.g., European Union Directive 2020/2184, US EPA, Health Canda) as well as in the context of the Stockholm Convention for the protection of human health and the environment from persistent organic pollutants. Additionally, analysis of PFAS embodied in consumer products suggests that typical methods used to quantify PFAS in surface and groundwater likely underestimate total PFAS concentration. Given this the future environmental burden posed by PFAS is likely underestimated. As PFAS are surfactants, they readily partition to interfaces - a process that governs their environmental fate. For example, some PFAS readily sorb to soil and sediment, partition to the air/water interface in the vadose zone or partition to atmospheric dust. This talk will also provide an overview of our predictive models that predict a wide range of PFAS interfacial partitioning under a range of environmental relevant geochemical conditions (i.e., as a function of ionic strength and salt valency). It will also touch on our efforts to develop reductive PFAS degradation technologies. Kratka biografija: Dr. O’Carroll is a Professor and Deputy Head of School (Research) in the School of Civil and Environmental Engineering at UNSW Australia. He is actively working to develop destructive PFAS treatment technologies, as well as investigating the factors that control the fate of PFAS in the environment. Additionally, he has completed a number of field trials investigating the utility of nZVI and sulfidized nZVI formulations developed in his laboratory for contaminated site remediation. This includes the impact of nZVI on long term in-situ bioremediation at these field trials. He is an associate editor of the journal Water Resources Research.
