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Main Title Modeling the benthos-water column exchange of hydrophobic chemicals /
Author Gschwend, P. M. ; Wu, S. C. ; Madsen, O. S. ; Wilkin, J. L. ; Ambrose, R. B.
Other Authors
Author Title of a Work
Gschwend, P. M.
CORP Author Massachusetts Inst. of Tech., Cambridge. Ralph M. Parsons Lab. for Water Resources and Hydrodynamics. ;National Taiwan Univ., Taipei. ;Woods Hole Oceanographic Institution, MA.;Environmental Research Lab., Athens, GA.
Publisher U.S. Environmental Protection Agency, Environmental Research Laboratory,
Year Published 1986
Report Number EPA/600/3-86/044; EPA-R-810472
Stock Number PB87-145389
Subjects Benthos
Additional Subjects Water chemistry ; Water analysis ; Sediment transport ; Numerical analysis ; Bed load ; Diffusion ; Sorption ; Benthos ; Mathematical models ; Computer applications
Library Call Number Additional Info Location Last
NTIS  PB87-145389 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 216 pages : illustrations ; 28 cm
A modeling framework was developed to predict the transfer of hydrophobic organic chemicals between bed sediments and overlying waters. The approach entails coupling a description of the microscopic scale process of sorption kinetics with models of the exposure of bed particles to adjacent waters of varying composition (i.e., due to diffusion of solutes in interstitial fluids or porewater advection, biological mixing of surficial sediments, suspension of bed solids for a period into the overlying water column). Numerical simulation routines are developed both for sorption kinetics and to demonstrate coupling of the particle-water exchange to particle movements in the case of a biologically mixed bed. These routines were used to assess the sensitivity of sorption kinetics and the overall transport to chemical and sediment properties. The model result is then combined with the sorption kinetics subroutine to estimate bed-water exchange in instances where these processes greatly facilitate bed particle-water column contact.
Caption title. "December 1986." "EPA/600/3-86/004." Microfiche.