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COMPUTED EFFECTS OF ADSORPTION KINETICS ON PESTICIDE MOVEMENT IN SOILS
Author(s) -
LEISTRA M.,
DEKKERS W. A.
Publication year - 1977
Publication title -
journal of soil science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.244
H-Index - 111
eISSN - 1365-2389
pISSN - 0022-4588
DOI - 10.1111/j.1365-2389.1977.tb02242.x
Subject(s) - adsorption , desorption , kinetics , soil water , pesticide , environmental chemistry , leaching (pedology) , chemistry , soil science , environmental science , ecology , physics , quantum mechanics , biology
Summary For a model at high water fluxes, the inclusion of first‐order adsorption‐desorption rate constants leads to slower leaching of pesticide and increased spread than predicted using instantaneous equilibrium. The initial condition of the substance near the soil surface is also found to be important. A model with simultaneous fast and slow adsorption‐desorption equilibria describes and explains published experimental data comparatively well. Under a pattern of intermittent rainfall, the effect of adsorption‐desorption kinetics on pesticide movement is comparatively small.