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FLUTe FACT^TM Laboratory Studies on Uptake and Extraction Method Variability and Implications for Field Performance

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Title: FLUTe FACT^TM Laboratory Studies on Uptake and Extraction Method Variability and Implications for Field Performance
Author: Redmond, Brent
Department: School of Engineering
Program: Engineering
Advisor: Parker, Beth
Abstract: The FLUTE FACT^TM (FLUTe Activated Carbon Technique) is a borehole technology used for mapping contaminant distribution in the subsurface. Batch experiments were performed to determine the equilibrium partitioning behaviour of VOCs with respect to the FACT, and to assess how effectively VOC mass is desorbed from the FACT for analysis. Multiple extraction techniques were tested for effectiveness at desorbing mass from the FACT. The partitioning behaviour of the VOCs was reasonably well described by the Langmuir isotherm, with Cs max values for different VOCs ranging from 8x103 to 2x104 µmol/kg. The methanol shake flask method was the best performing extraction technique, which displayed average mass percent recovery of 96%±6%. The experiment showed that the FACT and the procedures involved in sampling the FACT display great variability in data output between replicate samples, suggesting, while still useful for delineating contaminant distribution, should not be used in a quantitative manner.
URI: https://hdl.handle.net/10214/26679
Date: 2021-12
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