• Remediation of the Diesel Contaminated Soils Using Thermally Enhanced Soil Vapor Extraction Process with Microwave Heating
  • 마이크로웨이브 가열 토양증기추출 공정에 의한 경유 오염 토양처리
  • 김종운;박갑성;
  • 한국외국어대학교 환경학과;한국외국어대학교 환경학과;
Abstract
Removal efficiencies for diesel fuel and diesel hydrocarbons ($C_10$$C_22$) using microwave-enhanced SVE process were evaluated with dry and moist soil, respectively. Diesel removal rates of microwave-enhanced SVE process were 7 times for dry soil and 1580 times for moist soil as great as those of the SVE process without microwave heating. High dielectric property of water contents may accelerate the absorption of microwave energy into soil and thus vaporized the diesel fuel components drastically. The diesel removals were 67.7∼78.4% for $C_10$ and $C_12$, and 0∼18.5% for $C_14$$C_22$ for dry and moist soil with SVE process only. On the other hand, dry soil with microwave-enhanced SVE process showed 89.3∼99.4% removal for $C_10$ to and $C_12$ and 35.6∼67.0% for hydrocarbons over $C_14$. All hydrocarbons ($C_10$$C_22$) studied were significantly removed (93.6∼99.8%) for moist soil with microwave-enhanced SVE process.

마이크로웨이브 가열 SVE(토양증기추출)공정을 사용하여 경유로 오염된 건조 및 습윤토양에서의 경유와 경유계 탄화수소($C_10$$C_22$)의 제거현상 분석 실험을 수행하였다. 마이크로웨이브 가열방식이 있는 건조토양과 습윤토양에서의 제거속도는 마이크로웨이브 가열방식이 없는 토양에 비해 건조토양에서는 7배, 습윤토양에서는 1580배 높았다. 이것은 수분입자의 높은 유전율 때문으로 토양 내부에 마이크로웨이브 에너지를 빠르게 흡수시킴으로써 급격한 토양온도 증가와 증기화의 속도를 가속화시켜 경유제거의 시너지 효과를 가져왔기 때문으로 여겨진다. 마이크로웨이브 가열이 없는 SVE 공정의 건조토양과 습윤토양에서는 $C_10$$C_12$의 제거율이 67.7∼78.4%로 경유제거의 대부분을 차지하였고 $C_14$보다 무거운 탄화수소는 0∼18.5%의 낮은 제거율을 보였다. 반면에, 마이크로웨이브 가열 SVE공정의 건조토양에서는 $C_10$$C_12$가 89.3∼99.4%의 높은 비율로 제거되었으며, $C_14$보다 무거운 탄화수소도 35.6∼67.0%로 상당량 제거되었다. 한편, 마이크로웨이브 가열 SVE 공정의 습윤토양에서는 모든 탄화수소($C_10$$C_22$)가 93.6∼99.8% 제거되었다.

Keywords: Microwave heating;Soil Vapor Extraction (SVE);Hydrocarbon;Diesel;Soil remediation;

Keywords: 마이크로웨이브 가열;토양증기추출;탄화수소;경유;토양오염 복원;

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This Article

  • 2004; 9(1): 39-46

    Published on Mar 1, 2004