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Fate of Carbaryl, l-Naphthol, and Atrazine in Seawater
|Title:||Fate of Carbaryl, l-Naphthol, and Atrazine in Seawater|
|Authors:||Armbrust, Kevin L.|
Crosby, Donald G.
|Issue Date:||Jul 1991|
|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.
|Appears in Collections:||Pacific Science Volume 45, Number 3, 1991|
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