Equilibrium adsorption of isoproturon on soil and pure clays |
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| Authors: | F. WORRALL A. PARKER J.E. RAE A.C. JOHNSON |
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| Affiliation: | Postgraduate Research Institute for Sedimentology, The University, Whiteknights, Reading RG6 2AB, UK;The Institute of Hydrology, Maclean Building, Wallingford, Oxon OX10 8BB, UK |
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| Abstract: | The adsorption of isoproturon on soil and pure clay minerals has been investigated as a means of understanding its mobility in soils. Measured adsorption coefficients are correlated with soil and clay mineral properties. Soil organic matter controlled the adsorption of isoproturon at organic carbon contents exceeding 27 g kg?1, whereas at less than this threshold, clay mineral surfaces appeared to control adsorption. The effect of varying temperature suggests that adsorption of isoproturon is a physical process. From the comparison of the fits of linear, Freundlich, and Langmuir adsorption isotherms to the data, the adsorption is best described as a partition process. |
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