By-products of oxidation processes in water and wastewater treatment
- Univ. of North Carolina, Chapel Hill, NC (United States); and others
In a series of papers beginning with the seminal article in Science in 1975, Hoigne and co-workers developed the concept that ozone chemistry in the aqueous phase was fundamentally different from ozone chemistry in non-aqueous solvents or in the gas phase. The distinction is due to the formation of reactive intermediates formed when ozone decomposes in water, a phenomenon which Hoigne et al. also elucidated in subsequent papers. Since this pioneering work, only a few articles have examined ozone reactions with organic or inorganic chemicals in water in sufficient detail to sort out the interplay of ozone versus hydroxyl radical chemistry. Indeed, although the literature is replete with articles on the kinetics of OH reactions, relatively few have examined the detailed chemistry beyond the first step. This paper will describe recent studies in our laboratory which illustrate facets of ozone and OH-radical chemistry that Hoigne anticipated. We will summarize the reaction of ozone with amino acids in aqueous solution, the reaction of OH radicals with a compound (p-chlorobenzoic acid, PCBA) that apparently produces a propagating agent (superoxide) that {open_quotes}promotes{close_quotes} the chain radical decomposition of ozone, the formation of haloaldehydes and haloacetic acids from AOP destruction of tri- and tetrachloroethylene, and preliminary studies on the photolysis and OH radical products from 1,3,5-trinitro-sym-triazacyclohexane (RDX).
- OSTI ID:
- 214640
- Report Number(s):
- CONF-950801-; TRN: 96:000922-0111
- Resource Relation:
- Conference: 210. national meeting of the American Chemical Society (ACS), Chicago, IL (United States), 20-25 Aug 1995; Other Information: PBD: 1995; Related Information: Is Part Of 210th ACS national meeting. Part 1 and 2; PB: 1866 p.
- Country of Publication:
- United States
- Language:
- English
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