Search / Korean Journal of Chemical Engineering
HWAHAK KONGHAK,
Vol.30, No.3, 379-386, 1992
초임계유체를 이용한 토양 중의 유해물질 추출
Extraction of Hazardous Chemicals from Soil Using Supercritical Fluids
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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