Remediation Technology Summit


Bente H. Hyldegaard
Bente H. Hyldegaard

Industrial PhD Student
COWI & Technical University of Denmark

Bente holds a MSc in environmental engineering from Technical University of Denmark. She has studied abroad at University of Queensland, Australia, been a coop at Geosyntec, Canada, and joined Northeastern University, USA to collaborate on electrochemical research. She is currently pursuing an industrial PhD degree with COWI and Technical University of Denmark for which she amongst other prizes has received an Elite Research Travel Stipend from the Danish Ministry of Higher Education and Research.

STUDENT POSTER PRESENTATION

Electrochemistry as an Efficient Remedy for Tetrachloroethylene Plumes

Chlorinated ethenes are more frequently detected above regulatory levels in groundwater aquifers and current remedies are insufficient. With electrochemical remediation, i) fast reduction of chlorinated ethenes near the electrodes can be obtained and ii) reactants can be generated, which can subsequently reduce or oxidize the chlorinated ethenes. This study aims at filling in the major knowledge gaps that exist between state-of-the-art and application of electrochemistry for in situ remediation of high-permeability zones at chlorinated ethene contaminated sites. A stepwise approach to assessing the significance of natural hydrogeochemistry at common groundwater temperatures on the electrochemical transformation of tetrachloroethylene is applied using a column reactor being adapted to field-settings. Degradation pathways, air stripping and power consumption are amongst the parameters addressed. Electrochemistry is gaining increasing attention for remediation of contaminated sites, but the method needs to be significantly matured. This applied research brings valuable and relevant insight to the method towards field-demonstration.


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