Adsorption of triallate onto sandy soils and pig slurry

Abstract

Adsorption of the herbicide triallate has been measured onto four different sandy soils and a pig‐slurry sample using a slurry‐type procedure. Adsorption data best fitted a linear model for two soils and the pig slurry, whereas a non linear Freundlich L‐type (1/n < 1) isotherm was the best fit for the two other soils. In general, adsorption of triallate appeared to be related to soil organic matter content, and to be much greater onto the pig slurry than on any soil considered. The low‐humified, highly aliphatic organic matter of the pig slurry would favour triallate adsorption, possibly by facilitating hydrophobic binding mechanisms.

Key words:

• triallate
• adsorption
• sandy soils
• pig slurry