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Title: Fate of Carbaryl, l-Naphthol, and Atrazine in Seawater 
Author: Armbrust, Kevin L.; Crosby, Donald G.
Date: 1991-07
Publisher: University of Hawai'i Press
Citation: Armbrust KL, Crosby DG. 1991. Fate of carbaryl, l-naphthol, and atrazine in seawater. Pac Sci 45(3): 314-320.
Abstract: The fate of carbaryl, l-naphthol, and atrazine was determined
under light and dark conditions in filter-sterilized and raw (unfiltered) seawater.
Carbaryl was hydrolyzed in the dark, quantitatively, to l-naphthol with a
half-life of 24 hr at pH 7.9 or 23 hr at pH 8.2 (24°C). Naphthol was stable in the
dark in sterile seawater, but was degraded to undetectable levels in 96 hr in raw
seawater. In artificial sunlight, carbaryl degraded with a half-life of 5 hr and
l-naphthol was completely degraded after 2 hr. No further degradation products
were observed for either compound. Atrazine was stable under light and dark
conditions in sterile seawater; however, in raw seawater, it was degraded by 23%
after 96 hr. These data suggest that atrazine may be stable enough in seawater
to permit exposure of susceptible marine life, while, in the presence of sunlight,
carbaryl and l-naphthol would rapidly dissipate to undetectable levels.
ISSN: 0030-8870

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