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Chloroanilines (chlorobenzamines) are found in the environment as transformation products of herbicides and fungicides (for example diuron, linuron, vinclozolin) or in waste streams from tanning industries and pesticide industries. Linear and Freundlich adsorption-desorption isotherms were obtained for the soil sorption of 3,4,5-trichloroaniline (3,4,5-TCA). Hysteresis was observed for the desorption process. The organic carbon distribution coefficients (Kappa(oc)) were determined; log Kappa(oc) ranged from 3.42 +/- 0.2 to 3.51 +/- 0.2 for adsorption and from 3.52 +/- 0.2 to 3.71 +/- 0.2 for desorption. The regression lines for adsorption and desorption intercept the origin which strongly suggests that organic carbon is the main fraction determining the sorption of 3,4,5-TCA. In the present work 3,4,5-TCA was used as a model compound of the chloranilines. In order to compare the present data with literature data, empirical models using water solubilities and octanol/water partition coefficients for a broad range of chemicals were considered. The Kappa(oc) of 3,4,5-TCA was predicted reasonably well from empirical models based either on the water solubility or on the octanol/water partition coefficients.

Additional information

Authors: PAYA-PÉREZ A B, JRC Ispra (IT);PELUSIO F, JRC Ispra (IT)
Bibliographic Reference: Paper presented: 4th International Workshop on the Chemical, Biological and Ecotoxicological Behaviour of Pesticides in the Soil Environment, Roma (IT), May 29-31, 1991
Availability: Available from (1) as Paper EN 36187 ORA
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