Measurement error and spatial variability effects on characterization of volatile organics in the subsurface
Article Abstract:
Soil at a former land treatment facility for waste oils and solvents was intensively studied using two different methods to determine if volatile organic compounds (VOC) were present. The results showed that on-site VOC concentrations obtained using heated headspace'gas chromatography were approximately 10 times higher than off-site VOC measurements obtained using purge-and-trap gas chromatography mass spectrometry method. It is concluded that cost-effective field analyses can be more effective when sample density is large.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1995
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Modeling of field tests
Article Abstract:
A theoretical heat and mass transfer model was developed to characterize the process of mixed region vapor stripping and compared with field test results. The mass transfer coefficient that described the linear vapor-water-soil partitioning process showed independence from temperatures up to 30 degrees centigrade. However, the coefficient exhibited a functional relationship with process treatment volume.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1995
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Full-scale field experiments
Article Abstract:
Mixed region vapor stripping (MRVS) was evaluated for in situ treatment of contaminated fine-grained soils. Field tests were conducted involving seven columns that were contaminated by volatile organic compounds (VOCs). The columns were subjected to ambient air and heated air. MRVS showed substantial ability in removing VOC contaminants in the soil samples at 88%-98%.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1995
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