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Charlotte Sparrenbom

Charlotte Sparrenbom

Senior lecturer

Charlotte Sparrenbom

Multidisciplinary monitoring of an in-situ remediation test of chlorinated solvents

Author

  • Aristeidis Nivorlis
  • Charlotte Sparrenbom
  • Matteo Rossi
  • Sofia Åkesson
  • Torleif Dahlin

Summary, in English

Pollutions on and within the underground poses risks for groundwater contamination and is a widespread global problem. Common remediation methods based on digging and removal can be expensive and have limitations, while in-situ remediation is an attractive alternative. However, there is a need to develop tools to monitor the effectiveness both in terms of the successful injection of remediation fluids but also the effectiveness of the treatment, i.e., degree of degradation/removal of the pollutants and possible metabolites. This paper presents a methodology for monitoring the changes following an in-situ remediation treatment of a site contaminated with chlorinated solvents. The methodology consists of two different methods, where Direct Current resistivity and time-domain Induced Polarization (DCIP) was used to acquire daily data and geochemical analyses on water samples were collected approximately every three months. The geophysical results provide insights on how the injected fluids are spreading and assist in acquiring a better understanding of the geological and hydrogeological system. On the other hand, the geochemical sampling enhances our knowledge about the hydrochemistry of the system and the concentration of the pollutants. Our research highlights the challenges of monitoring in-situ bioremediation experiments in complex environments and in cases where pollutants are situated in low hydraulic conductivity formations. The joint interpretation of the data shows the importance of an interdisciplinary approach to understand complex systems.

Department/s

  • Engineering Geology
  • BECC: Biodiversity and Ecosystem services in a Changing Climate
  • Quaternary Sciences
  • LTH Profile Area: Water
  • Department of Geology
  • LTH Profile Area: The Energy Transition

Publishing year

2024-04-20

Language

English

Publication/Series

Science of the Total Environment

Volume

922

Document type

Journal article

Publisher

Elsevier

Topic

  • Oceanography, Hydrology, Water Resources

Keywords

  • Geoelectrical
  • Hydrochemistry
  • In-situ bioremediation
  • Induced polarization
  • Monitoring
  • Polluted ground
  • Resistivity

Status

Published

ISBN/ISSN/Other

  • ISSN: 0048-9697