Journal of the Korean GEO-environmental Society (한국지반환경공학회 논문집)

Korean Geo-Environmental Society (한국지반환경공학회)
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Performance of Soil Flushing for Contaminated Soil Using Surfactant

계면활성제를 이용한 오염 토양 세정 성능 평가

  • 이채영 (수원대학교 공과대학 토목공학과) ;
  • 장영수 (수원대학교 공과대학 토목공학과)
  • Received : 2011.02.07
  • Accepted : 2011.05.03
  • Published : 2011.06.01
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Abstract

In this study, a series of experiments were carried out to remove total petroleum hydrocarbon(TPH) and toluene by soil flushing. In batch experiments, Triton X-100 and SWA 1503 showed TPH removal efficiency of 79.0% and 69.0%, respectively. Although the TPH removal efficiency increased as the surfactant was increased in the concentration range 1-11mmol/L, the optimum concentration was 1mmol/L, considering the ratio of the removal efficiency to the amount of surfactant injected. In column experiment, the optimal velocity was 0.3mL/min. The physical aquifer model(PAM) result revealed that the soil flushing removed as much as 5.5% of the toluene under 3 pore volume(PV) conditions. To improve the soil flushing efficiency, it is necessary to find optimal condition through recirculation or reuse of surfactant.

본 연구에서는 석유계총탄화수소와 톨루엔을 토양세정에 의해 제거하기 위하여 일련의 실험을 수행하였다. 회분식 실험 결과 Triton X-100과 SWA 1503의 경우 각각 79.0%와 69.0%의 TPH 제거효율을 나타내었다. 계면활성제의 농도 1-11mmol/L에서 계면활성제 농도 증가에 따라 TPH 제거효율은 증가하였으나 주입량 대비 제거효율 고려 시 최적 농도는 1mmol/L로 나타났다. 칼럼 실험 결과 최적의 유속은 0.3mL/min으로 나타났다. PAM(Physical Aquifer Model) 실험 결과 3 PV(Pore Volume) 동안 토양세정을 통해 주입한 톨루엔 중 약 5.5%가 제거된 것으로 나타났다. 따라서 토양세정의 효율을 증가시키기 위해서는 계면활성제의 재순화 또는 재이용을 통한 최적 운전조건의 도출이 필요하다.

Keywords

References

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