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PERFLUOROALKYL AND POLYFLUOROALKYL SUBSTANCES THERMAL DESORPTION EVALUATION
Crownover, E., D. Oberle, M. Kluger, and G. Heron. | Remediation 29(4):77-81(2019)
In situ thermal heating was evaluated as a treatment method to achieve a high degree of PFAS removal from soils through volatilization. To minimize vapor treatment required for PFAS thermal remediation, a scrubber was incorporated into the treatment train to transfer PFAS to the liquid phase in a concentrated low-volume solution. Vapor-liquid equilibrium behavior and the extent of PFAS volatilization from impacted soil over a range of temperatures were evaluated. Heating soil to 350°C and 400°C reduced PFAS soil concentrations by 99.91% and 99.998%, respectively. Sulfonate-based PFAS generally required higher temperatures for volatilization to occur than carboxylate-based PFAS.
In situ thermal heating was evaluated as a treatment method to achieve a high degree of PFAS removal from soils through volatilization. To minimize vapor treatment required for PFAS thermal remediation, a scrubber was incorporated into the treatment train to transfer PFAS to the liquid phase in a concentrated low-volume solution. Vapor-liquid equilibrium behavior and the extent of PFAS volatilization from impacted soil over a range of temperatures were evaluated. Heating soil to 350°C and 400°C reduced PFAS soil concentrations by 99.91% and 99.998%, respectively. Sulfonate-based PFAS generally required higher temperatures for volatilization to occur than carboxylate-based PFAS.
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