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IN-PLACE REGENERATION OF GAC USING FENTON'S REAGENTS
Citation:
DE LAS CASAS, C. L., K. G. BISHOP, L. M. BERCIK, M. JOHNSON, M. POTZLER, W. P. ELA, A. E. SAEZ, S. G. HULING, AND R. G. ARNOLD. IN-PLACE REGENERATION OF GAC USING FENTON'S REAGENTS. ISBN13:978084123969, Chapter 2, C.J. Clark, A.S. Lindner (ed.), Remediation of Hazardous Waste in the Subsurface (ACS Symposium Series 940). American Chemical Society, Washington, DC, , 43-65, (2006).
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Description:
This paper evaluates the feasibility of using Fenton’s reagents for in-place recovery of spent granular activated carbon (GAC). Fenton’s reagents are cycled through spent GAC to degrade sorbed chlorinated hydrocarbons with little loss of carbon capacity. Seven chlorinated compounds were tested to determine the compound-specific effectiveness for GAC regeneration, which strongly correlated to the contaminant’s solubility. The most soluble contaminant, methylene chloride, had an 89% degradation during a 14-hour regeneration period. The Fenton’s process was also applied at a field site where GAC was loaded with tetrachloroethylene and trichloroethylene from a soil vapor extraction system at a state Superfund site. In the field, up to 95% TCE destruction was achieved during regeneration periods comparable to the bench-scale experiments.
