Air sparging: Effects of VOCs and soil properties on VOC volatilization

Conference · Sun Dec 31 04:00:00 EST 1995

OSTI ID:467728

Chao, K P ^[1]; Ong, S K ^[2]

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1. Polytechnic Univ., Brooklyn, NY (United States). Dept. of Civil and Environmental Engineering
2. 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

Related Subjects

54 ENVIRONMENTAL SCIENCES
CARBON TETRACHLORIDE
CHEMICAL PROPERTIES
CHLORINATED ALIPHATIC HYDROCARBONS
GAS INJECTION
IN-SITU PROCESSING
PHYSICAL PROPERTIES
REMEDIAL ACTION