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Main Title Aquatic humic substances as sources and sinks of photochemically produced transient reactants /
Author Hoigne, Jurg. ; Faust, B. C. ; Haag, W. R. ; Scully, F. E. ; Zepp., R. G.
Other Authors
Author Title of a Work
Faust, Bruce C.
Haag, Werner R.
Zepp, Richard G.
CORP Author Environmental Research Lab., Athens, GA. ;Eidgenoessische Anstalt fuer Wasserversorgung, Abwasserreinigung und Gewaesserschultz, Duebendorf (Switzerland).
Publisher U.S. Environmental Protection Agency, Office of Research and Development, Environmental Research Laboratory,
Year Published 1989
Report Number EPA/600/D-89/172
Stock Number PB90-142894
Additional Subjects Humic acids ; Surface waters ; Photochemical reactions ; Water pollution ; Solar radiation ; Dissolved organic matter ; Sources ; Free radicals ; Reaction kinetics ; Oxygen ; Oxidants ; Hydrogen peroxide ; Reprints ; Hydroxyl radicals ; Peroxy radicals
Library Call Number Additional Info Location Last
NTIS  PB90-142894 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 23 pages ; 28 cm
In sunlit surface waters, aquatic humics and nitrate act as sensitizers or precursors for the production of photoreactants such as singlet oxygen, humic-derived peroxy radicals, hydrogen peroxide, and solvated electrons. Lifetimes of the various reactants are controlled by their reactions with aquatic humics, by solvent quenching (singlet oxygen), by reactions with molecular oxygen (solvated electron), or by other processes (peroxy radicals). The steady-state concentration of each transient formed during solar irradiation was determined from the observed disappearance rate of added organic probe compounds. The probe compounds have selective reactivities with the individual transient species of interest. Effects of these photoreactants on the elimination of micropollutants and on chemical transformations of dissolved organic matter are discussed. (Copyright (c) 1989 American Chemical Society.)
"Published paper: Chapter 23 In: Aquatic Humic Substances: Influence on Fate and Treatment of Pollutants. I.H. Suffet and P. Mac Carthy (Eds.). American Chemical Society, Washington Dc. Advances in Chemistry Series 219, 1989, p. 363-381." PB90-142894. EPA/600/D-89/172. Microfiche.