Development of an innovative methodology for monitoring of in situ remediation of chlorinated solvents – the MIRACHL-project

Forskningsoutput: KonferensbidragPoster

Abstract

Background
Dense Non Aqueous Phase Liquids (DNAPL) such as chlorinated solvents are common pollutants stemming from different types of industries including dry cleaning facilities, and reports on cases showing serious risk to soil and ground water are frequent on a global scale. DNAPLs are especially problematic as they are denser than water and move down through the groundwater, not always following the groundwater flow but are mainly driven by gravitational forces. Difficulties associated with remediation activities of DNAPLs are many, especially delineation of the source plume, and understanding of the migration of contaminated groundwater in the underground.
Therefore, the Swedish national environmental authority, (SEPA) has called for new and innovative in-situ remediation techniques.
The MIRACHL-project (monitoring of in situ remediation of chlorinated hydrocarbon contaminants - http://mirachl.com/) are focused on developing new and innovative methods for better understanding of the transport and fate of chlorinated solvents in soil and groundwater. The MIRACHL-project combine three methods; i)geoelectrical imaging by the geophysical method Direct Current resistivity and Induced Polarisation (DCIP), ii)Physical and BioGeochemical Characterisation (PBGC) and iii)the method Compound-specific isotope analysis (CSIA). The MIRACHL-project, based at the Engineering Geology at Lund University, is a collaborative project including several other universities and other relevant organizations, In particular, the collaboration on field sites with the Geological Survey of Sweden (SGU) is of great importance.

Aim
In the MIRACHL project we develop an integrated methodology based on three
methods, i.e., Direct Current resistivity and Induced Polarisation (DCIP), Physical and BioGeochemical Characterisation (PBGC) and the method Compound-specific isotope analysis (CSIA), to better understand and map in situ remediation processes. A combination of continuous geo-electrical observations during the decontamination, together with the analysis of biogeochemistry and isotope fractionation, provides opportunities to follow transport and fate of chlorinated solvents during different types of in-situ remediation processes.
The MIRACHL-project started in 2016 and will continue until 2022. In 2017, the
MIRACHL methodology was established at two sites in collaboration with SGU, i.e., in Hagfors and Alingsås. At both site contaminations coming from dry cleaning facilities are in focus. The geology and hydrogeology is very different at these sites and the presentation will show the status in mapping and monitoring the ongoing remediation at the sites.
Conclusion
Initial studies performed at a site in Kristianstad (Färgaren 3) show the combination of DCIP, PBGC, and CSIA are promising methodology for mapping of transport and fate of chlorinated solvents. We will present on-going research on two sites where contamination from chlorinated solvents are in focus, i.e, contamination due to dry cleaning activities in Hagfors and Alingsås.

Detaljer

Författare
Enheter & grupper
Externa organisationer
  • Tyréns AB
  • Stockholms universitet
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Miljövetenskap
  • Oceanografi, hydrologi, vattenresurser
  • Naturresursteknik
Originalspråkengelska
Sidor112
Antal sidor113
StatusPublished - 2018 sep 3
PublikationskategoriForskning
Peer review utfördJa
EvenemangNordrocs, Joint Nordic meeting on Remediation of Contaminated Sites - International Conference, 2018 - Helsingör, Danmark
Varaktighet: 2018 sep 32018 sep 6
Konferensnummer: 7th
http://nordrocs.org/

Konferens

KonferensNordrocs, Joint Nordic meeting on Remediation of Contaminated Sites - International Conference, 2018
Förkortad titelNordrocs
LandDanmark
Period2018/09/032018/09/06
Internetadress

Related projects

Torleif Dahlin, Charlotte Sparrenbom, Matteo Rossi, Håkan Rosqvist, Mats Svensson, Catherine Paul, Henry Holmstrand , Esben Auken, Gianluca Fiandaca, Aristeidis Nivorlis, Sofia Åkesson, Line Meldgaard Madsen & Tina Martin

2016/07/012021/06/30

Projekt: Forskning

Visa alla (1)