Ferrate (Fe(VI)) is one of the more promising emerging water treatment technologies, but there has been limited research on potential benefits in a water reuse paradigm. Fe(VI) has a relatively high oxidation potential, and is known to inactivate waterborne pathogens. The ferric iron resulting from Fe(VI) reduction could support downstream coagulation processes. The California Code of Regulations Title 22 “Water Recycling Criteria” (CCR 22) has identified key pollutants that must be transformed for new recycled water oxidation technologies to be accepted. Recent literature has shown that Fe(VI) oxidation could be enhanced by “activation” with the addition of low molar ratios of reductants or acid. This study examined the impact of sodium sulfite-activated Fe(VI) in laboratory prepared solutions as well as spiked municipal wastewater effluents with the goal of meeting the 0.5-log (69%) removal of the organic contaminants, such as 1,4-dioxane, outlined in CCR 22. Additionally, the formation of brominated disinfection byproducts (DBPs) [e.g. brominated THMs] by activated Fe(VI) were examined. Bench-scale, batch experiments assessed treatment effectiveness by analysis of Fe(VI) decay over time and contaminant transformation under varying activation conditions. Optical and X-ray transient absorbance methods were also deployed to elucidate the role of intermediate iron radicals (e.g. Fe(V)) in aqueous media. Results presented will show the effectiveness of activated Fe(VI) to oxidize contaminants and the generation of DBPs relative to the benchmarks of CCR 22. In particular, the relative importance of reaction intermediates will be discussed. Generally, the results indicate that activated Fe(VI) seems viable for water reuse with possible achievement of CCR 22 guidance in full-scale applications.

Assessment of activated ferrate oxidation for wastewater reuse

Macromolecular Chemistry: The Second Century

[Author Benefits](https://scimeetings.acs.org/?utm_source=pubs_content_marketing&utm_medium=website&utm_campaign=0320_MCF_NPI_Launch_Spring_Homepage&ref=pubs_content_marketing)

[How to use SciMeetings](https://storage.googleapis.com/dl.morressier.com/acs/SciMeetings-ACSSpring2020-HowToGuide_M3020-Final.pdf)

[Frequently Asked Questions](https://storage.googleapis.com/dl.morressier.com/acs/SciMtng_ACSNMSp2020_FAQ_M3120_Final.pdf)

ACS Spring 2020 National Meeting & Expo

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