Supercritical fluid extraction of 2,4,6-trinitrotoluene and 1,3,5-trinitrobenzene from soil
- Univ. of Nevada, Reno, NV (United States)
Optimization of a methanol-modified supercritical fluid extraction (SFE) technique using carbon dioxide has resulted in the effective recovery of 2,4,6-trinitrotoluene (TNT) and 1,3,5-trinitrobenzene (TNB) from spiked and native soils. Several parameters, including modifier concentration, temperature, density, and static and dynamic extraction time were varied independently to determine the effect of each on analyte recovery. The optimal SFE conditions are: 5% methanol, 150{degree}C, 7500 PSI, 5 minutes static extraction and 15 minutes dynamic extraction. Samples were analyzed by gas chromatography using electron-capture detection (ECD). SFE quantitatively recovered both TNT and TNB from the soil matrix in considerably less time than conventional Soxhlet extraction with ethyl acetate and sonication with acetonitrile. 12 refs., 4 figs., 5 tabs.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 484466
- Journal Information:
- Journal of Environmental Science and Health, Part A: Environmental Science and Engineering, Journal Name: Journal of Environmental Science and Health, Part A: Environmental Science and Engineering Journal Issue: 6 Vol. 31; ISSN 0360-1226; ISSN JESEDU
- Country of Publication:
- United States
- Language:
- English
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