Oxidative treatment technologies that utilize oxidants such as hydroxyl radicals, ozone and chlorine are now widespread in a variety of water treatment applications, including wastewater, water reuse and drinking water. While these technologies are highly effective in removing organic contaminants, there is increasing evidence that their degradation can lead to the formation of transformation products that are of toxicological concern. However, the identification of transformation products, especially those with low molecular weights, is frequently hampered by their high polarity and lack of ionizable groups which makes them difficult to detect by conventional analytical techniques. To address this issue, we developed a novel analytical approach that uses nucleophilic amino acids such as N-alpha-acetyl lysine as derivatization agents. Applying this approach to the degradation of phenolic compounds by HOCl or hydroxyl radicals allowed us to identify a,b-unsaturated aldehydes as important electrophilic transformation products. In order to investigate the formation of organic electrophiles more widely, we have now extended our investigations to other compound classes. This talk will discuss our findings, including the relevant reaction mechanisms leading to the formation of electrophiles and resulting implications for the quality assessment of treated waters.

Formation of organic electrophiles during water treatment with chemical oxidants: Precursors, mechanisms and implications for water quality assessment

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

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