Micropollutants are widely present in aquatic environments and pose risks to human and ecological health. Destruction of micropollutants by advanced oxidation technologies is playing an important role. The degradations of micropollutants using hydroxyl radical (●OH)- and sulfate radicals (SO4●-)-based advanced oxidation processes are greatly affected by anion components like chloride and carbonate of polluted water. In comparison, ferrates (FeVIO42-, FeV, and FeIV) are less influenced by such anions in water. However, FeVIO42- has sluggish reactivity with recalcitrant micropollutants. In the last few years, we have been applying different activators that could produce ferrate-based multi-oxidant systems to oxidize micropollutants efficiently in water. The roles of activators like bisulfite, thiosulfate, peroxymonosulfate (PMS), hydrogen peroxide, and peroxyacetic acid (PAA) will be presented. Examples of remediating micropollutants such as pharmaceuticals will be given. Research to understand the chemistry behind the increased efficiency in the multi-oxidant systems will be discussed, including the generation of reactive FeIV/FeV species, hydroxyl radical (●OH), sulfate radicals (SO4●-), and/or organic radicals (CH3C(O)O●/CH3C(O)OO●) in different activator-ferrate(VI) system, and subsequently their roles in enhancing the oxidation of micropollutants. Mechanisms will be described by using quantum chemical calculations and by performing methyl phenyl sulfoxide as the chemical probe molecule.

Ferrate-based multi oxidant strategy to enhance oxidation of micropollutants in water

Fall 2022 abstracts, posters, and presentations will launch in mid-September.

ACS Fall 2022

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.