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Main Title Numerical Modeling of Sorption Kinetics of Organic Compounds to Soil and Sediment Particles (Journal Version).
Author Wu, S. C. ; Gschwend, P. M. ;
CORP Author National Taiwan Univ., Taipei. Inst. of Environmental Engieering. ;Massachusetts Inst. of Tech., Cambridge. Dept. of Civil Engineering.;Environmental Research Lab., Athens, GA.
Publisher c1988
Year Published 1988
Report Number EPA-R-810472; EPA/600/J-88/181;
Stock Number PB89-119523
Additional Subjects Soil chemistry ; Organic compounds ; Chemisorption ; Kinetics ; Mathematical models ; Diffusion ; Sediments ; Research projects ; Chemical reactions ; Path of pollutants
Library Call Number Additional Info Location Last
NTIS  PB89-119523 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 12p
A numerical model is developed to simulate hydrophobic organic compound sorption kinetics, based on a retarded intraaggregate diffusion conceptualization of this solid-water exchange process. The model was used to ascertain the sensitivity of the sorption process for various sorbates to nonsteady solution concentrations and to polydisperse soil or sediment aggregate particle size distributions. Common approaches to modeling sorption kinetics amount to simplifications of the model and appear justified only when (1) the concentration fluctuations occur on a time scale that matches the sorption time scale of interest and (2) the particle size distribution is relatively narrow. Finally, a means is provided to estimate the extent of approach of a sorbing system to equilibrium as a function of aggregate size, chemical diffusivity and hydrophobicity, and system solids concentration. (Copyright (c) American Geophysical Union 1988.)