Persistence and spatial range as endpoints of an exposure-based assessment of organic chemicals
Article Abstract:
A classification method for environmental chemicals based on exposure quantities uses persistence and spatial range as endpoints. The spatial range of these chemicals is presented as the counterpart of the persistence. Mathematical definitions are provided to calculate both persistence and spatial range from exposure data. A one-dimensional model of the global circulation is developed, covering diffusive and nondiffusive phase transfer processes as well as net first-order degradation. The model is tested by quantifying the distribution behavior of CCI3F and 1-butanol in terms of the three spatial ranges of the soil, water and air phases.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1996
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Analysis of diffusion and sorption of organic solutes in soil-bentonite barrier materials
Article Abstract:
Laboratory research was conducted to examine the movement of chloride, trichloroethylene (TCE) and aniline in soil-bentonite (SB) slurry wall materials. Column transport trials were performed, with main focus on the measurement of spatial contaminant mass profiles within column after 25 to 50 days of transport under diffusion-dominated conditions. The aovective-dispersive-reaction (ADR) equation was discovered to offer good predictions of the results of the column experiments with calibrated diffusion parameters that were inside the area examined by other scientists for earthen barrier materials.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1998
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Environmental forensics: unraveling site liability
Article Abstract:
Costly environmental lawsuits have led to the development of an interdisciplinary analytical approach, environmental forensics, to determine environmental liability at contaminated sites. Environmental forensics, which comprises both technical and legal professionals, use sophisticated analytical techniques such as chemical fingerprinting in their investigation of contaminated sites. Chemical fingerprinting allows investigators to identify and map contamination in the subsurface and identify and allocate responsibility among possible responsible parties.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1998
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