In-line measurement of trichloroethylene vapors using tin dioxide sensors

Journal Article · Thu Dec 31 04:00:00 EST 1998 · Ground Water Monitoring and Remediation

DOI:https://doi.org/10.1111/j.1745-6592.1998.tb00170.x· OSTI ID:290216

Heron, G; Zutphen, M van; Enfield, C G

During thermally enhanced in situ remediation of soils and ground water, gas streams are generated with varying temperatures, moisture content, and organic compound concentrations. In this study, the authors evaluated the performance of tin dioxide sensors for measuring trichloroethylene (TCE) concentrations in gas streams from a thermally enhanced soil vapor extraction system. Temperature, pressure, moisture content, and vapor flow rates affected the resistivity of the sensors, and thus the signal. When fluctuations in these parameters were eliminated by condensing excess water and heating to a constant temperature prior to measurement, the sensors provided reliable in-line measurement of TCE concentrations. Gas tracers such as methane were easily monitored in-line, providing quick and inexpensive data on subsurface vapor flow velocities and direction.

• Sponsoring Organization: USDOE
• OSTI ID: 290216
• Journal Information: Ground Water Monitoring and Remediation, Journal Name: Ground Water Monitoring and Remediation Journal Issue: 4 Vol. 18; ISSN GWMREV; ISSN 1069-3629
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
CHLORINATED ALIPHATIC HYDROCARBONS
GROUND WATER
IN-SITU PROCESSING
MONITORING
PERFORMANCE
REMEDIAL ACTION
SOILS
TIN OXIDES
WATER POLLUTION CONTROL