Supercritical fluid extraction of 2,4,6-trinitrotoluene and 1,3,5-trinitrobenzene from soil

doi:https://doi.org/10.1080/10934529609376429

Title: Supercritical fluid extraction of 2,4,6-trinitrotoluene and 1,3,5-trinitrobenzene from soil

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Abstract

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.

Authors:

Wujcik, C E; Seiber, J N ^[1]

Univ. of Nevada, Reno, NV (United States)

Publication Date:: 1996-07-01

Sponsoring Org.:: USDOE

OSTI Identifier:: 484466

Resource Type:: Journal Article

Journal Name:: Journal of Environmental Science and Health, Part A: Environmental Science and Engineering

Additional Journal Information:: Journal Volume: 31; Journal Issue: 6; Other Information: PBD: Jul 1996

Country of Publication:: United States

Language:: English

Subject:: 54 ENVIRONMENTAL SCIENCES; 40 CHEMISTRY; TNT; SUPERCRITICAL GAS EXTRACTION; CARBON DIOXIDE; SOILS; OPTIMIZATION; METHANOL; GAS CHROMATOGRAPHY; ELECTRON CAPTURE; TEMPERATURE DEPENDENCE; DENSITY; DYNAMICS; ENVIRONMENTAL EXPOSURE; NUMERICAL DATA

Citation Formats


                    Wujcik, C E, and Seiber, J N. Supercritical fluid extraction of 2,4,6-trinitrotoluene and 1,3,5-trinitrobenzene from soil.  United States: N. p., 1996. 
        Web.  doi:10.1080/10934529609376429.

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                    Wujcik, C E, & Seiber, J N. Supercritical fluid extraction of 2,4,6-trinitrotoluene and 1,3,5-trinitrobenzene from soil.  United States.  https://doi.org/10.1080/10934529609376429

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                    Wujcik, C E, and Seiber, J N. Mon .  
        "Supercritical fluid extraction of 2,4,6-trinitrotoluene and 1,3,5-trinitrobenzene from soil".  United States.  https://doi.org/10.1080/10934529609376429.

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@article{osti_484466,

  title        = {Supercritical fluid extraction of 2,4,6-trinitrotoluene and 1,3,5-trinitrobenzene from soil},

  author       = {Wujcik, C E and Seiber, J N},

  abstractNote = {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.},

  doi          = {10.1080/10934529609376429},

  url          = {https://www.osti.gov/biblio/484466},
  journal      = {Journal of Environmental Science and Health, Part A: Environmental Science and Engineering},
number       = 6,

  volume       = 31,

  place        = {United States},

  year         = {1996},

  month        = {7}

}

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https://doi.org/10.1080/10934529609376429

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