Combined remediation technologies: results from field trials at chlorinated solvent impacted sites

Thursday, 17 December 2015: 10:20
3016 (Moscone West)
Denis M O'Carroll1, Ahmed I Chowdhury1, Line Lomheim2, Hardiljeet K Boparai3, Kela Weber4, Leanne Murdie Austrins5, Elizabeth Edwards2, Brent Sleep2, Cjestmir V de Boer1 and Ariel N Garcia3, (1)University of Western Ontario, London, ON, Canada, (2)University of Toronto, Toronto, ON, Canada, (3)Western University, Civil and Environmental Engineering, London, ON, Canada, (4)Royal Military College of Canada, Kingston, ON, Canada, (5)CH2M HILL, Komoka, ON, Canada
Non-aqueous phase liquids (NAPLs) are one class of waste liquids often generated from waste mixtures in industrial processes containing surfactants, chlorinated hydrocarbons and other compounds. Chlorinated solvents, a particularly persistent NAPL contaminant, frequently contaminate water sources for decades and are one of the more common contaminants at brownfield and industrialized sites. Although considerable advances in our understanding of the phenomena governing NAPL remediation have been made, and a number of innovative remediation technologies have been developed, existing technologies are rarely able to achieve clean up goals in contaminated aquifers at the completion of remedial activities. The development and pilot scale testing of new and innovative remediation technologies is, therefore, crucial to achieve clean up goals at contaminated sites. Our research group is currently investigating a number of innovative remediation technologies, either individually or as combined remedies. This includes the applicability of nanometals and ISCO (e.g., persulfate) for contaminated site remediation. These technologies can be combined with technologies to enhance amendment delivery (e.g., electrokinetics) or create conditions favorable for enhanced biotic contaminant degradation. This presentation will discuss outcomes from a number of field trials conducted at chlorinated solvent impacted sites by our group with a particular focus on combined remediation technologies.