A Study on the Removal of Aromatic Compounds from Soil and Zeolite Using Supercritical Carbon Dioxide 


Vol. 9,  No. 4, pp. 197-206, Dec.  2003


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  Abstract

We performed removal of aromatic compounds, benzene and toluene, from soil and zeolite using supercritical carbon dioxide. Extraction was performed at 50 °C and 27.7 MPa with changing the extent of pollutant concentration and the results were compared and analyzed. Experiments were carried out using flow method and high pressure extractor of 1.27 cm in diameter and 25cm in length was used. The pollutants were sampled every ten minutes and their concemtrations were analyzed with GC/FID. As a result, highly contaminated sample followed solubility/elution model and slightly contaminated sample followed desorption/kinetics model. At the same condition benzene was extracted faster than toluene. In the case of zeolite, more time is required to extract pollutants than soil. This phenomena was due to high adsorption capacity of zeolite. In the case of highly contaminated soil, we could correlate experimental data using simple Brady's fixed bed extractor model. But in the case of slightly contaminated soil, that was governed with desorption/kinetics model, there was some errors.

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  Cite this article

[IEEE Style]

B. W, S. B, K. H, K. H, "A Study on the Removal of Aromatic Compounds from Soil and Zeolite Using Supercritical Carbon Dioxide," Clean Technology, vol. 9, no. 4, pp. 197-206, 2003. DOI: .

[ACM Style]

Bae W, Shin B, Kang H, and Kim H. 2003. A Study on the Removal of Aromatic Compounds from Soil and Zeolite Using Supercritical Carbon Dioxide. Clean Technology, 9, 4, (2003), 197-206. DOI: .

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