System effects on benzene removal from saturated soils and ground water using air sparging

Journal Article · Sun Mar 01 04:00:00 EST 1998 · Journal of Environmental Engineering

DOI:https://doi.org/10.1061/(ASCE)0733-9372(1998)124:3(288)· OSTI ID:577380

Reddy, K R; Adams, J A ^[1]

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1. Univ. of Illinois, Chicago, IL (United States)

This paper presents the results of a laboratory investigation performed to study the role of various air sparging system parameters on the removal of benzene from saturated soils and ground water. A series of one-dimensional column experiments was conducted with predetermined contaminant concentrations and predetermined injected air flow rates and pressures to investigate the effects of: (1) the soil type; (2) the use of pulsed air injection; and (3) the synergistic effects of co-contaminants on air sparging removal efficiency. This study demonstrated that the grain size of the soils affects the air sparging removal efficiency. A threshold value exists for effective particle size (D{sub 10}), which is equal to 0.2 mm; above this threshold value, the rate of removal is linearly proportional to the D{sub 10} value; while below this value, there is a drastic increase in the time required for contaminant removal. Additionally, it was demonstrated that pulsed air injection did not offer any appreciable advantages over continuous injection for the coarse sand; however, pulsed air injection led to substantial reductions in system operating time for the fine sand. Finally, it was found that benzene and toluene existing along had similar removal rates; however, they were removed slightly more quickly when they coexisted in the test soil.

• Sponsoring Organization: USDOE
• OSTI ID: 577380
• Journal Information: Journal of Environmental Engineering, Journal Name: Journal of Environmental Engineering Journal Issue: 3 Vol. 124; ISSN 0733-9372; ISSN JOEEDU
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
BENZENE
GROUND WATER
IN-SITU PROCESSING
PERFORMANCE
REMEDIAL ACTION
SOILS