Soil properties and design factors influencing free-phase hydrocarbon cleanup
Article Abstract:
The recovery of light nonaqueous phase liquids (LNAPL) such as gasoline and fuel oil in three different soil types and using several recovery designs reveal that soil capillary characteristics, LNAPL saturation, mobility and distance from the well affect LNAPL recovery. Free-product pumping or skimming was found to be less effective in recovering large amounts of LNAPL in fine-grained soil. A significant reduction in LNAPL saturation was observed only within about 10-15 ft of the well. A 95% recovery of LNAPLs, however, in coarse-grained soils was achieved using fluid pumping.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1998
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Sequestration of hydrophobic organic contaminants by geosorbents
Article Abstract:
The sequestration of hydrophobic organic contaminants (HOCs) by geosorbents appears to be governed by inorganic micropores, natural sorbent organic components, combustion residue particulate carbon and spilled organic liquids. Analytical characterization at the microscale and mechanistic models derived therefrom will help validate inferences about sorption mechanisms and the chemical factors affecting the sequestration of HOCs by geosorbents.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1997
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Quantification of the dilute sedimentary soot phase: implications for PAH speciation and bioavailability
Article Abstract:
Soot may have an important effect on the speciation of polycyclic hydrocarbons (PAH). In order to include soot partitioning in PAH partition models, a recent research developed a method to quantify soot carbon in dilute and complex matrices. The method involved the removal of nonsoot organic carbon by thermal oxidation, acidification to remove inorganic carbonates, and CHN elemental analysis of the residual soot carbon.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1997
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