Abstract
The impact of variations in pore-water velocity on the nonequilibrium sorption and transport of organic chemicals was investigated. Miscible displacement experiments were performed with four organic chemicals (dichlorobenzene, naphthalene, tetrachloroethene and p-xylene) and three aquifer materials having low organic-carbon contents (0.02-0.1%). The results of the experiments were analyzed by using a one-dimensional advective-dispersive transport model, wherein sorption is considered instantaneous for a fraction of the sorbent and rate-limited for the remainder. An inverse relationship between the reverse sorption rate constant and the equilibrium sorption constant was evident for each of two velocities. However, there was an order-of-magnitude difference between the rate constants obtained at the two velocities. This suggests the existence of a time-scale effect, which must be accounted for when modeling the transport of organic solutes.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 353-368 |
| Number of pages | 16 |
| Journal | Journal of Contaminant Hydrology |
| Volume | 9 |
| Issue number | 4 |
| DOIs | |
| State | Published - 1992 |
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ASJC Scopus subject areas
- Environmental Chemistry
- Water Science and Technology
- Earth-Surface Processes
Cite this
Nonequilibrium transport of organic chemicals : The impact of pore-water velocity. / Brusseau, Mark L.
In: Journal of Contaminant Hydrology, Vol. 9, No. 4, 1992, p. 353-368.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Nonequilibrium transport of organic chemicals
T2 - The impact of pore-water velocity
AU - Brusseau, Mark L
PY - 1992
Y1 - 1992
N2 - The impact of variations in pore-water velocity on the nonequilibrium sorption and transport of organic chemicals was investigated. Miscible displacement experiments were performed with four organic chemicals (dichlorobenzene, naphthalene, tetrachloroethene and p-xylene) and three aquifer materials having low organic-carbon contents (0.02-0.1%). The results of the experiments were analyzed by using a one-dimensional advective-dispersive transport model, wherein sorption is considered instantaneous for a fraction of the sorbent and rate-limited for the remainder. An inverse relationship between the reverse sorption rate constant and the equilibrium sorption constant was evident for each of two velocities. However, there was an order-of-magnitude difference between the rate constants obtained at the two velocities. This suggests the existence of a time-scale effect, which must be accounted for when modeling the transport of organic solutes.
AB - The impact of variations in pore-water velocity on the nonequilibrium sorption and transport of organic chemicals was investigated. Miscible displacement experiments were performed with four organic chemicals (dichlorobenzene, naphthalene, tetrachloroethene and p-xylene) and three aquifer materials having low organic-carbon contents (0.02-0.1%). The results of the experiments were analyzed by using a one-dimensional advective-dispersive transport model, wherein sorption is considered instantaneous for a fraction of the sorbent and rate-limited for the remainder. An inverse relationship between the reverse sorption rate constant and the equilibrium sorption constant was evident for each of two velocities. However, there was an order-of-magnitude difference between the rate constants obtained at the two velocities. This suggests the existence of a time-scale effect, which must be accounted for when modeling the transport of organic solutes.
UR - http://www.scopus.com/inward/record.url?scp=0026849042&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0026849042&partnerID=8YFLogxK
U2 - 10.1016/0169-7722(92)90003-W
DO - 10.1016/0169-7722(92)90003-W
M3 - Article
AN - SCOPUS:0026849042
VL - 9
SP - 353
EP - 368
JO - Journal of Contaminant Hydrology
JF - Journal of Contaminant Hydrology
SN - 0169-7722
IS - 4
ER -