Thursday, February 21, 2013
11:00 AM – 12:00 PM PST
This webinar event will detail two field study remediation projects designed to evaluate the effectiveness of in situ chemical oxidation (ISCO) using catalyzed persulfate (PersulfOx™) vs. base-activated persulfate on petroleum hydrocarbons. One study site was impacted by gasoline within a shallow unconfined silty sand aquifer, whereas the second site was fractured bedrock impacted by heating oil.
The field studies were designed to evaluate the two different types of persulfate applied at each site and reagent-specific characteristics including:
- Material delivery into the treatment area
- Subsurface distribution
- Reagent persistence
- Treatment effectiveness
- Potential for rebound
Key findings that will also be discussed include:
- Distribution of oxidant solution varies by injection method
- Buffering reactions appear to have a significant impact on pH-based activation
- There is limited correlation between laboratory and field test
- Catalyzed persulfate (PersulfOx) produced significantly better treatment results than base-activated persulfate
Rick McGregor is President of InSitu Remediation Services based in Southern Ontario Canada. Rick holds a B.Sc. and M.Sc. from the University of Waterloo in hydrogeology and geochemistry and has over 20 years-experience in in situ remediation. His experience includes working as a research hydrogeologist with Environment Canada’s Wastewater Technology Centre as well as leading a mid- sized consultant’s remediation group. His company specializes in the design and delivery of various chemical and biological reagents to the subsurface with sites across Canada and internationally. He has served on numerous Canadian and American federal government technical committees and has published several peer-reviewed papers on assessment and remediation.
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