Angelos Almpanis

Characterization of organic compounds with DC Resistivity and Induced Polarization

The contaminated with dense non-aqueous phase liquids (DNAPLs) sites are a major environmental issue that can provoke risks to human life and ecosystems. DNAPLs are extremely hazardous immiscible organic contaminants with high solubilities sufficient to contaminate the subsurface and consequently the groundwater. A basic component for the purification of DNAPLs and the successful remediation of these sites is the characterization and monitoring of the DNAPL source zones.

The high electrical resistivity of the DNAPLs in conjunction with the high resistivity contrast with the surrounding groundwater constitutes electrical resistivity tomography (ERT) an efficient tool for the detection and monitoring of the DNAPL source zones. This case has been already studied by Dr. Power, where in plain terms, he related hydrogeological properties to electrical properties, concluding to a coupled DNAPL-DC model. Moreover, as DNAPLs present increased Induced Polarization (IP) signatures in cases where DC resistivity anomalies are relatively weak, the previous work can be extended to include chargeability (Time-Domain IP) and complex conductivity (Frequency-Domain IP).

This is the main objective of this research, which will focus on a theoretical approach first, linking hydrogeological properties and chargeability in the time domain IP, developing then a coupled DNAPL-TDIP model. Furthermore, the work will be extended to the frequency domain IP and the development of a DNAPL-SIP model. Finally, both experimental and field data trials will be carried out to confirm the models reliability and improve their effectiveness.

Personal Background

TIn 2016, I graduated from the Aristotle University of Thessaloniki, Greece with a Bachelor’s degree in Geology with Geophysics being the main field of my study. In 2018, I obtained my Master’s in Applied and Environmental Geology in the same department, receiving qualifications in the subject of Applied Geophysics. The subject of my thesis was the study of the applicability of cross borehole electrical resistivity tomography within boreholes, involving both experimental and field data trials. Since 2016, I have been a Research Assistant in the Exploration Geophysics Laboratory in the department of Geophysics of the School of Geology, Aristotle University Thessaloniki, Greece. I have participated in more than 30 research geophysical projects ranging from hydrogeological, environmental to engineering and archaeological. Throughout my participation in these projects, I have gained a lot of experience and a strong background in a variety of geophysical prospecting methods and mostly in electrical methods. Currently, I am a Ph.D. student in the department of Civil and Environmental Engineering at the Western University under the supervision of Dr. Power. In addition, I hold a position in the RESTORE research group, where I hope to contribute in its research.

Conferences


  • 24th European Meeting of Environmental and Engineering Geophysics (EAGE) in Porto, Portugal, 9-12 September 2018 - Oral presentation
  • Publications


  • Almpanis, A., Tsourlos, P., Papazachos, C., Vargemezis, G., 2018. Cross-hole ERT measurements in slotted PVC cased boreholes. A new perspective in geoelectrical prospection. Intended for submission to “Near Surface Geophysics”. Extended abstract, DOI: 10.3997/2214-4609.201802505