Iron-based oxidants of tetra-oxy anions of high-valent iron species, commonly called ferrates (FeVIO42- (FeVI), FeVO43- (FeV), and FeIVO44- (FeIV)), have shown increasing interest in green energy, sustainable organic synthesis, and depollution of emerging contaminants in water. In the last few years, we are interested in enhancing the oxidation capability of FeVI by tuning its chemistry that involved intermediate species, FeV and FeIV, which have 2-4 orders of higher reactivity than FeVI. The presentation will show how the magnitude of enhanced oxidation of a wide range of pollutants in 30 s vary with the addition of one-electron transfer reductant (sulfite (SO32-) and established oxygen-transfer reductants (hydroxylamine (NH2OH), arsenite (As(OH)3), selenite (SeO32-), phosphite (PO33-), and nitrite (NO2-)) to FeVI. Addition of sulfite resulted in enhanced removal of pollutants up to 100%. Comparatively, oxygen-atom transfer reductants yielded enhancement up to only 40%. Mechanisms of differences in enhancement of oxidation of pollutants by these additive reductants to FeVI will be discussed.

Enhanced oxidation of organic pollutants in water by activated ferrate(VI): Electron-transfer versus oxygen-atom transfer reductants

2019 Spring National Meeting

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