Air sparging: Effects of VOCs and soil properties on VOC volatilization
- Polytechnic Univ., Brooklyn, NY (United States). Dept. of Civil and Environmental Engineering
- Iowa State Univ., Ames, IA (United States). Dept. of Civil and Construction Engineering
The effect of the physical-chemical properties of volatile organic compounds (VOCs) and soil on the volatilization of VOCs during air sparging was investigated using a laboratory-scale air sparging system. The variables studied included two types of soils, three different VOCs, and various air flowrates. VOCs used were chloroform, trichloroethylene (TCE), and carbon tetrachloride. As expected, the percent removal efficiencies of VOCs over a 24-h period were proportional to the injected air flowrate and Henry`s law constant. Experimental results also indicated that beyond a certain air flowrate, the mass of TCE removed was similar for the two porous media used in the experiments. The VOCs volatilized from the porous media appeared to be limited by the interfacial surface area of the water-air interface of the air channels. However, other physical processes, such as diffusion, may also be limiting.
- OSTI ID:
- 467728
- Report Number(s):
- CONF-950483--; ISBN 1-57477-003-9
- Country of Publication:
- United States
- Language:
- English
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