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OLS Field Name OLS Field Data
Main Title Photochemical Fate of Agrochemicals in Natural Waters.
Author Zepp, R. G. ;
CORP Author Environmental Research Lab., Athens, GA.
Publisher 1991
Year Published 1991
Report Number EPA/600/D-91/131;
Stock Number PB91-216226
Additional Subjects Agricultural chemicals ; Water pollution effects ; Photochemical reactions ; Water chemistry ; Precipitation(Meteorology) ; Path of pollutants ; Oxidation ; Pesticides ; Research and development ; Experimental design ; Sea water ; Adsorption ; Air water interactions ; Deposition ; Field tests ; Fresh water ; Reaction kinetics ; Solar radiation ; Agricultural runoff ; Reprints ; Chemical reaction mechanisms
Library Call Number Additional Info Location Last
NTIS  PB91-216226 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 11/26/1991
Collation 21p
Abstract Agrochemicals are introduced into aquatic environments through direct application or through indirect pathways such as runoff, partitioning into condensed phases in the troposhere, and atmospheric deposition into freshwater and marine systems. Sunlight-induced direct and indirect photoreactions are an important sink for agrochemicals in such environments. Both laboratory and field studies have been conducted to develop and test concepts and mathematical relationships that describe environmental photoreactions. These efforts achieved early success in the case of photoreactions that involve the direct absorption of solar radiation by agrochemicals. Direct photoreactions, however, account for only a part of these sunlight-induced reactions. Recent studies have shown that other reactions involving photochemically produced reactive chemical transients also are an important fate for many agrochemicals. These include hydroxyl, hydroperoxyl/superoxide, organoperoxyl, carbonate, and dibromide ion radicals as well as singlet molecular oxygen and solvated electrons. Hydrogen peroxide, a widely distributed oxidant in the sea, fresh waters, and cloud water that is produced via the intermediacy of superoxide radicals, may be involved in the oxidation of agrochemicals by the Fenton reaction or by peroxidase-catalyzed oxidations.
Supplementary Notes Pub. in Pesticide Chemistry: Advances in International Research, Development, and Legislation, p329-345 1991.
NTIS Title Notes Journal article.
Title Annotations Reprint: Photochemical Fate of Agrochemicals in Natural Waters.
Category Codes 68D; 68E; 99E
NTIS Prices PC A03/MF A01
Primary Description 600/01
Document Type NT
Cataloging Source NTIS/MT
Control Number 125534493
Origin NTIS
Type CAT