Transformation of 3-chloroallyl alcohol in water-saturated subsoil studied with a column method
Beltman, W.H.J. | Leistra, M. | Matser, A.M.
The performance of a newly developed column method for pesticide transformation rate measurements in the subsoil was tested using (Z)- and (E)-3-chloroallyl alcohol as model compounds. Sandy anaerobic water-saturated subsoil was collected at between 1.8 and 2.3 m below the surface of a flower-bulb field. Transformation rates were measured using subsoil columns that were filled in situ and were compared with the transformation rates in laboratory incubation systems. In the column experiment the half-life ranged from 0.5 to 5.2 days for (Z)-3-chloroallyl alcohol and from 1.0 to 5.5 days for (E)-3-chloroallyl alcohol. The capacity of the saturated subsoil for transformation of both isomers increased in the course of the column experiment. In the incubation experiment the 3-chloroallyl alcohols were transformed gradually in the first three days, with a half-life of 1.9 days for both isomers. Thereafter the transformation rate accelerated. The general conclusion is that the column method yields results similar to those of the incubation method for these rapidly transforming compounds.
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