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Investigations of Potential Radical Interaction in the Formation of Brominated Organic Compounds in Water

by Rengao Song, Univ of Illinois, Urbana, United States,
Adam Eyring, Univ of Illinois, Urbana, United States,
Roger Minear, Univ of Illinois, Urbana, United States,



Document Type: Proceeding Paper

Part of: Critical Issues in Water and Wastewater Treatment

Abstract:

A system has been designed that permits the examination of the formation of organic bromine compounds via a radical pathway. Hydroxyl radicals (HO^?) generated by the Fenton reaction were reacted with aqueous bromide ion (Br^-) and natural organic matter (NOM) to form bromide radicals (Br^?, Br₂^?-, ...), which may in turn react with NOM and/or NOM radicals to form organic bromine compounds, measured as total organic bromine (TOBr). Preliminary experimental data show that in the presence of tert-butyl alcohol, an effective HO^? scavenger, the reaction was quenched. When the concentration of Br^- was increased, the amount of TOBr increased. TOBr also increased when the concentration of NOM was increased. These results suggest that a radical pathway, in addition to the well-established pathway involving HOBr, may also account for the formation of TOBr. However, further experiments is definitely necessary.

Subject Headings: Organic matter | Water treatment | Organic compounds | Ozonization | pH | Permits | Ozone

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