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Research Article

A Study on the Applicaton of Electrical Resistivity Survey in the Contaminated Soil and Groundwater Site

토양 및 지하수 오염지역에 대한 전기비저항탐사의 적용성 연구

Seungheon Chae1
,
Sangeun Lee2*
,
Gyo-Cheol Jeong3
채 승헌1
,
이 상은2*
,
정 교철3
1Manager, Lotte Engineering & Construction
2Professor, Department of Energy and Resources Engineering, Kangwon National University
3Professor, Department of Earth and Environmental Sciences, Andong National University
1롯데건설 대리
2강원대학교 에너지공학부 교수
3안동대학교 지구환경과학과 교수
*Corresponding Author
31 December 2020. pp. 525-539
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Abstract

A site containing buried solid waste and treated water and oil storage containers from a leather manufacturing plant was studied through soil and groundwater pollution and electrical resistivity surveys with the aim of identifying areas polluted by leachate generated by landfilling with leather waste and leakage wastewater. It was found that TPH and Zn exceeded environmental standards for soil pollution and, for leachate and groundwater, Cr(VI) concentrations exceeded standard levels for groundwater quality. An electrical resistivity survey was used to elucidate soil and groundwater pollution characteristics and diffusion pathways. Ten survey lines were set up with an electrode spacing of 5 m in a dipole-dipole array. The hydraulic characteristics of soil determined by groundwater contamination surveys matched well the low-resistivity-anomaly zones. Electrical resistivity surveys of areas containing contaminated soil and groundwater that have irregular strata due to waste reclamation are thus useful in highlighting vertical and horizontal pollutant diffusion pathways and in monitoring contaminated and potentially contaminated areas.

Keywords
leather waste
electrical resistivity survey
leachate
diffusion path

본 연구지역은 피혁 제조공정에서 발생된 고형폐기물, 처리용수 및 유류 저장용기 등이 매립되어 있는 지역이다. 피혁폐기물 매립으로 발생된 침출수에 의한 오염영역을 파악하기 위하여 토양․지하수 오염도 조사 및 전기비저항탐사를 수행하였다. 토양오염 분석 결과 TPH와 아연 항목에서 토양오염 우려기준을 초과하였으며, 침출수 및 지하수의 경우 6가 크롬 항목이 지하수 정화기준을 초과하는 것으로 파악되었다. 전기비저항탐사는 토양 ‧ 지하수 오염특성 및 확산경로를 파악하기 위하여 쌍극자배열법으로 전극간격이 5 m인 총 10개의 측선을 설정하였다. 토양․지하수 오염도 조사의 결과와 저비저항이상대가 비교적 잘 일치하였다. 따라서 본 연구지역과 같이 폐기물 매립에 따른 불규칙한 지층분포와 토양․지하수가 복합적으로 오염된 지역에서 전기비저항탐사를 병행하면 오염원에 의한 수직․수평적인 확산경로, 오염영역 및 향후 오염 예상지역에 대한 모니터링을 계획하는데 있어서 유용한 조사기법으로 사용될 수 있을 것이다.

키워드
피혁 폐기물
전기비저항 탐사
침출수
확산경로
References
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Information
  • Publisher :Korean Society of Engineering Geology
  • Publisher(Ko) :대한지질공학회
  • Journal Title :The Journal of Engineering Geology
  • Journal Title(Ko) :지질공학
  • Volume : 30
  • No :4
  • Pages :525-539
  • Received Date : 2020-11-09
  • Revised Date : 2020-12-01
  • Accepted Date : 2020-12-02
  • DOI :https://doi.org/10.9720/kseg.2020.4.525
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