Journal of Soil and Groundwater Environment (한국지하수토양환경학회지:지하수토양환경)

Korean Society of Soil and Groundwater Environment (한국지하수토양환경학회)
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Investigation of Seasonal Characteristics of Contaminants and Hydrochemical Factors in an Aquifer for Application of In Situ Reactive Zone Technology

원위치 반응존 공법 적용을 위한 대수층내 오염물질 및 환경영향인자의 계절 특성 평가

  • Ahn, Jun-Young (Department of Civil & Environmental Engineering, Pusan National University) ;
  • Kim, Cheolyong (Department of Civil & Environmental Engineering, Pusan National University) ;
  • Kim, Tae Yoo (Department of Civil & Environmental Engineering, Pusan National University) ;
  • Jun, Seong-Chun (GeoGreen21 Co., Ltd.) ;
  • Hwang, Inseong (Department of Civil & Environmental Engineering, Pusan National University)
  • 안준영 (부산대학교 사회환경시스템공학과) ;
  • 김철용 (부산대학교 사회환경시스템공학과) ;
  • 김태유 (부산대학교 사회환경시스템공학과) ;
  • 전성천 ((주)지오그린21) ;
  • 황인성 (부산대학교 사회환경시스템공학과)
  • Received : 2016.12.05
  • Accepted : 2016.12.12
  • Published : 2016.12.31
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Abstract

A field investigation was conducted on an aquifer contaminated with trichloroethylene (TCE) for application of in situ reactive zone treatment using nanosized zero-valent iron (NZVI). The aquifer was an unconfined aquifer with a mean hydraulic conductivity of $5.14{\times}10^{-4}cm/sec$, which would be favorable for NZVI injection. Seasonal monitoring of TCE concentration revealed a presence of non-aqueous phase liquid form of TCE near IW (injection well). The hydrochemical data characterized the site groundwater to be a $Ca-HCO_3$ type. The average value of Langelier Saturation Index of the groundwater was -1.33, which implied that the site was favorable for corrosion of NZVI. Dissolved oxygen (DO) concentration varied between 2.5~11.5 mg/L, which indicated that DO would greatly compete with TCE as an electron acceptor. The hydrogeological and hydrochemical characterization reveals that the time around November would be appropriate for NZVI injection when water level and temperature are relatively high and DO concentration is low.

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References

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