TY - JOUR
T1 - Sediment-air equilibrium partitioning of semi-volatile hydrophobic organic compounds. Part 1. Method development and water vapor sorption isotherm
AU - De Seze, G.
AU - Valsaraj, K. T.
AU - Reible, D. D.
AU - Thibodeaux, L. J.
N1 - Funding Information:
This work was supported by a grant from the US Environmental Protection Agency through the Hazardous Substance Research Center (S and SW) at Louisiana State University, Baton Rouge, LA, USA.
PY - 2000/5/15
Y1 - 2000/5/15
N2 - Contaminated sediments that become exposed to air as a result of dredging and disposal in confined disposal facilities are potential sources of air pollution. A critical parameter to develop emission estimation models is the equilibrium partition coefficient of contaminants, between sediment and air. In this first of two articles, we present a method, based on gas saturation in a flowing stream, to study both the adsorption of water and semi-volatile organic compounds on a sediment from the Campus Lake, Baton Rouge, LA, USA. The experimental set-up was used to determine the adsorption isotherm for water partitioning between sediment and pore-air. A detailed characterization of the sediment surface area and pore volume was used to develop an adsorption-condensation model for predicting water sorption on sediment. The model was used to estimate the importance of water adsorption on mineral surfaces and condensation in pores. This information serves, in the accompanying second article in the series, as the basis for the modeling of the partitioning of phenanthrene, and dibenzofuran. Copyright (C) 2000 Elsevier Science B.V.
AB - Contaminated sediments that become exposed to air as a result of dredging and disposal in confined disposal facilities are potential sources of air pollution. A critical parameter to develop emission estimation models is the equilibrium partition coefficient of contaminants, between sediment and air. In this first of two articles, we present a method, based on gas saturation in a flowing stream, to study both the adsorption of water and semi-volatile organic compounds on a sediment from the Campus Lake, Baton Rouge, LA, USA. The experimental set-up was used to determine the adsorption isotherm for water partitioning between sediment and pore-air. A detailed characterization of the sediment surface area and pore volume was used to develop an adsorption-condensation model for predicting water sorption on sediment. The model was used to estimate the importance of water adsorption on mineral surfaces and condensation in pores. This information serves, in the accompanying second article in the series, as the basis for the modeling of the partitioning of phenanthrene, and dibenzofuran. Copyright (C) 2000 Elsevier Science B.V.
KW - Sediment-air partitioning
KW - Water vapor sorption
UR - http://www.scopus.com/inward/record.url?scp=0034658511&partnerID=8YFLogxK
U2 - 10.1016/S0048-9697(00)00362-4
DO - 10.1016/S0048-9697(00)00362-4
M3 - Article
C2 - 10843328
AN - SCOPUS:0034658511
SN - 0048-9697
VL - 253
SP - 15
EP - 26
JO - Science of the Total Environment
JF - Science of the Total Environment
IS - 1-3
ER -