Use of Undisturbed Soil Columns under Controlled Conditions To Study the Fate of [14C]Deethylatrazine

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Date
1996-04-01
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Kruger, Ellen
Rice, Pamela
Anhalt, Jennifer
Anderson, Todd
Coats, Joel
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Coats, Joel
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Abstract

The fate of [14C]deethylatrazine [2-chloro-4-amino-6-(isopropylamino)-s-triazine] was studied under controlled conditions by using undisturbed soil columns in the laboratory. In a 13-week leaching study, the percentage of [14C]deethylatrazine recovered was greatest in the first leaching event (1.3% of the applied 14C), suggesting that preferential flow occurred. The total concentration of deethylatrazine leached from soil columns over the 13-week period was 4.9 μg/L (3.6% of the applied 14C). Unidentified polar degradates made up 3.8% of the applied radioactivity recovered in the leachate, and didealkylatrazine [2-chloro-4,6-(diamino)-s-triazine] and deethylhydroxyatrazine [2-hydroxy-4-amino-6-(isopropylamino)-s-triazine] occurred in trace quantities. Sixty-seven percent of the applied 14C remained in the top 10 cm of soil columns, with 48% as bound residues, 12% as unidentified polar degradates, 5.5% as deethylatrazine, 0.2% as didealkylatrazine, and less than 0.1% as deethylhydroxyatrazine.

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This article is from Journal of Agricultural and Food Chemistry 44 (1996): 1144, doi:10.1021/jf950349j. Posted with permission.

Keywords
Atrazine, deethylatrazine, didealkylatrazine, deethylhydroxyatrazine, mobility, leaching
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