Abstract
Adsorption of endosulphan on uncontaminated (sandy loam and loam) soils in acetone‐water and methanol‐water mixtures at different fs values has been studied by batch shake technique. Higher adsorption of endosulphan was obserbed on loam soil than sandy loam soil and was anticipated with Freundlich constant K values and partition coefficient KD values. The K and KD values also confirm that adsorption of endosulphan was higher in acetone‐water mixtures than methanol‐water mixtures and decreases with increase in fs values. The data were used to evaluate the cosolvent theory for describing adsorption of endosulphan in acetone‐water and methanol‐water mixtures. The aqueous phase partition coefficient KDW (mol/g) normalised on foc for endosulphan was evaluated by extrapolating fs = 0.
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