de Seze G, Valsaraj K T, Reible D D, Thibodeaux L J
Department of Chemical Engineering and Hazardous Substances Research Center (S and SW), Louisiana State University, Baton Rouge 70803, USA.
Sci Total Environ. 2000 May 15;253(1-3):15-26. doi: 10.1016/s0048-9697(00)00362-4.
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.
由于疏浚以及在密闭处置设施中进行处置而暴露于空气中的受污染沉积物是空气污染的潜在来源。开发排放估算模型的一个关键参数是污染物在沉积物和空气之间的平衡分配系数。在这两篇文章的第一篇中，我们提出了一种基于流动水流中气体饱和度的方法，用于研究水和半挥发性有机化合物在美国路易斯安那州巴吞鲁日市校园湖沉积物上的吸附情况。该实验装置用于确定沉积物与孔隙空气之间水分配的吸附等温线。利用沉积物表面积和孔隙体积的详细表征来开发一个吸附 - 冷凝模型，以预测沉积物对水的吸附。该模型用于估计矿物表面水吸附和孔隙中冷凝的重要性。在该系列文章的第二篇中，这些信息作为菲和二苯并呋喃分配建模的基础。
