The effect of soil mineral-organic matter interaction on simazine adsorption and desorption

摘要

The desorption behaviour of simazine from a pure clay (montmorillonite), two >pure> humic substances, and from clay-humic complexes was investigated using a dynamic column system. The mobile and non-mobile fractions of simazine, the first order desorption coefficient, and the in situ distribution coefficient were measured. Generally, the desorption properties of simazine from the clay-humic complexes could not be predicted from those obtained from the studies done with a pure clay or humic substances alone.