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초임계유체를 이용한 토양 중의 유해물질 추출
Extraction of Hazardous Chemicals from Soil Using Supercritical Fluids
HWAHAK KONGHAK, June 1992, 30(3), 379-386(8), NONE
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Abstract
토양 및 고체폐기물 중의 유해물질을 제거하는 공정 중에서 초임계유체 분리공정을 이용하여 토양에 오염된 o-dinitrobenzene의 추출을 시도하였다. 순수 CO2와 acetone, methanol과 같은 entrainer를 5wt% 포함한 혼함유체를 사용하여 entrainer의 종류, 유량 및 온도에 따른 추출효율을 검토하였다. 본 연구에서 이용한 추출에 대한 수학적 model로 토양 중의 잔류농도를 계산한 결과 실험치와 일치되는 좋은 결과를 얻을 수 있었다.
Among various processes to remove hazardous chemicals in soil or soil waste materials the supercritical fluid separation process has been selected to extract o-dinitrobenzene contaminated in soil. The effects of entrainers, flow rate and temperaure on separation efficiency have been investigated using pure CO2 and mixtures containing 5wt% of acetone or methanol as entrainers. A mathematical model has been proposed to calculate the residual concentration of o-dinitrobenzene in soil, which agrees well with the experi-mental data.
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Shim JJ, Johnston KP, J. Phys. Chem., 95, 353 (1991)
deFilippi RP, Krukonis VJ, Robey RJ, Modell M, U.S. EPA Report EPA-600/2-80-054 (1980)
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Brady BO, Kao CP, Dooley KM, Knopf FC, Gambrell RP, Ind. Eng. Chem. Res., 26, 261 (1987)
Dooley KM, Kao CP, Gambrell RP, Knopf FC, Ind. Eng. Chem. Res., 26, 2058 (1987)
Tan CH, Liou DC, Ind. Eng. Chem. Res., 27, 988 (1988)
Tan CH, Liou DC, Ind. Eng. Chem. Res., 28, 1222 (1989)
Tsekhanskaya YV, Iomtev MB, Mushkina EJ, Russ. J. Phys. Chem., 38, 1173 (1964)
Sutikno T, Himmelstein KJ, Ind. Eng. Chem. Fundam., 22, 420 (1983)
Akman U, Sunol AK, AIChE J., 37(2), 215 (1991)
