A Field Based Study on the Effect of Dissolved Organic Matter on the Transport of Terbuthylazine

Three agricultural fields in Germany were used to investigate the migration of terbuthylazine in relation to the water-extractable organic carbon of the soils. Terbuthylazine is gradually replacing atrazine in Europe. Distribution coefficients, which are defined as the concentration of a chemical in...

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Bibliographic Details
Published inChemosphere (Oxford) Vol. 28; no. 3; p. 533
Main Authors Zsolnay, Adam, Wherhan, Marc, Steindl, H
Format Journal Article
LanguageEnglish
Published 01.02.1993
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Summary:Three agricultural fields in Germany were used to investigate the migration of terbuthylazine in relation to the water-extractable organic carbon of the soils. Terbuthylazine is gradually replacing atrazine in Europe. Distribution coefficients, which are defined as the concentration of a chemical in the adsorbed phase divided by its concentration in the aqueous phase, were determined for each soil sample. Results indicated that the water-extractable organic C had no influence on the distribution coefficients in two of the fields. In the third field, the water-extractable organic C could explain only about 20% of the variation in the distribution coefficient. Overall results suggest that the water-extractable organic C of agricultural soils need not be considered in groundwater risk assessments, especially in terms of non-ionic pesticides with water solubilities below 10 mg/l.
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ISSN:0045-6535