• Assessment of Potential Natural Attenuation of Arsenic by Geological Media During Managed Aquifer Recharge 
  • Dasomi Park1 ·Sung Pil Hyun2 ·Kyoochul Ha1,3·Hee Sun Moon1,3,*

  • 1 Groundwater Research Center, Korea Institute of Geoscience and Mineral Resources
    2 Center for HLW Geological Disposal, Korea Institute of Geoscience and Mineral Resources
    3 Department of Mineral and Groundwater Resources, University of Science and Technology(UST)

  • 대수층 함양관리에 있어서 지질매질에 의한 비소 자연저감 가능성 평가 
  • 박다소미1 ·현성필2 ·하규철1,3 ·문희선1,3, *

  • 1 한국지질자원연구원 지질환경연구본부 지하수연구센터
    2 한국지질자원연구원 국토지질연구본부 방사성폐기물지층처분연구단
    3 과학기술연합대학교대학원 광물지하수자원학과


Managed aquifer recharge (MAR) is a promising water management strategy for securing stable water resources to overcome water shortage and water quality deterioration caused by global environmental changes. A MAR demonstration site was selected at Imgok-ri, Sangju-si, Korea, based on screening for the frequency of drought events and local water supply situations. The abundant groundwater discharging from a nearby abandoned coal mine is one of the potential recharge water sources for the MAR implementation. However, it has elevated levels of arsenic (~12 mg/L). In this study, the potential of the natural attenuation of arsenic by the field geological media was investigated using batch and column experiments. The adsorption and desorption parameters were obtained for two drill core samples (GM1; 21.8~22.8 m and GM2; 26.0~27.8 m depth) recovered from the potentially water-conducting fracture-zones in the injection well. The effluent arsenic concentrations were monitored during the continuous flow of the mine drainage water through the columns packed with the core samples. GM2 removed about 60% of arsenic in the influent (0.1 mg-As/L) while GM1 removed about 20%. The results suggest that natural attenuation is an acitive process occurring during the MAR operation, potentially lowering the arsenic level in the mine drainage water below the regulatory standard for drinking water. This study hence demonstrates that using the mine drainage water as the recharge water source is a viable option at the MAR demonstration site.

Keywords: Arsenic adsorption, Geological media, Natural attenuation, Managed aquifer recharge

This Article

  • 2020; 25(3): 12-22

    Published on Sep 30, 2020

  • 10.7857/JSGE.2020.25.3.012
  • Received on Jul 29, 2020
  • Revised on Aug 3, 2020
  • Accepted on Aug 21, 2020

Correspondence to

  • Hee Sun Moon
  • 1 Groundwater Research Center, Korea Institute of Geoscience and Mineral Resources

  • E-mail: hmoon@kigam.re.kr