TY - JOUR
T1 - Bioturbation driven transport of hydrophobic organic contaminants from bed-sediment
AU - Thibodeaux, Louis J.
AU - Valsaraj, Kalliat T.
AU - Reible, Danny D.
PY - 2000/8/20
Y1 - 2000/8/20
N2 - Seemingly at odds with expected behavior the transport coefficient for soluble HOCs released from bed-sediment increases with increasing partitioning on to the particle phase. This apparent behavior is supported by two sets of data: one set is total PCBs plus five congeners from the Hudson River, NY and the other set is three HOCs tested in our laboratory microcosm. 7 The proposed mechanism for this behavior is particle bioturbation in the upper decimeters of the sediment bed, instantaneous desorption at the sediment-water interface followed by transport through the benthic boundary layer. A simple theoretical model equation is developed based on the mechanism and correlated to both data sets, The intrinsic transport coefficients extracted from the correlation parameters agree with published data on the particle mixing biodiffusion and the benthic boundary layer coefficients.
AB - Seemingly at odds with expected behavior the transport coefficient for soluble HOCs released from bed-sediment increases with increasing partitioning on to the particle phase. This apparent behavior is supported by two sets of data: one set is total PCBs plus five congeners from the Hudson River, NY and the other set is three HOCs tested in our laboratory microcosm. 7 The proposed mechanism for this behavior is particle bioturbation in the upper decimeters of the sediment bed, instantaneous desorption at the sediment-water interface followed by transport through the benthic boundary layer. A simple theoretical model equation is developed based on the mechanism and correlated to both data sets, The intrinsic transport coefficients extracted from the correlation parameters agree with published data on the particle mixing biodiffusion and the benthic boundary layer coefficients.
UR - http://www.scopus.com/inward/record.url?scp=0345753649&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0345753649
SN - 0093-3066
VL - 40
SP - 717
EP - 720
JO - ACS Division of Environmental Chemistry, Preprints
JF - ACS Division of Environmental Chemistry, Preprints
IS - 2
ER -