期刊
CHEMOSPHERE
卷 99, 期 -, 页码 192-198出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2013.10.073
关键词
Diesel oil; Porous media; Volatilization; Boundary-layer regulated processes; Mean grain size
资金
- National Natural Science Foundation of China [40272108]
- Natural Science Foundation of Shandong Province [ZR2012DL05]
- Project of Shandong Province Higher Educational Science and Technology Program [J12LC51]
- Zibo City Science and Technology Development Program [9001-112077]
Volatilization plays an important role in attenuating petroleum products in contaminated soils. The objective of this study was to evaluate the influence of wind speed, vessel diameter and mean grain size of porous media on diesel oil volatilization. Experiments were conducted to investigate the volatilization behavior of diesel oil from porous media by weighing contaminated samples pre- and post-volatilization. Three selected field porous media materials were evaluated: Silty Clay Loam, Fine Sand, and Coarse Sand along with six individual sand fractions of the Coarse Sand. Results indicate that increasing wind speed accelerates the diesel oil volatilization process, especially for wind speeds below 2.10 m s(-1). The low-carbon components of diesel oil volatilize more rapidly, with the effects of wind speed more pronounced on C-10 to C-15 volatilization than on C-16 and higher. The volatilization rate coefficient of diesel oil increases with decreasing mean grain size of porous media, and with increasing vessel diameter. A power function expressed the relationship with mean grain size. All processes (wind speed, vessel diameter, and mean grain size) were included in an equation which explained over 92% of the measured diesel oil volatilization rate coefficient variations for the experiments. Diesel oil volatilization appears to be boundary-layer regulated to some extent. (C) 2013 Elsevier Ltd. All rights reserved.
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