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Thermally activated persulfate oxidation regeneration of NOM- and MTBE- spent granular activated carbon
Citation:
Ko, S., A. Hutson, AND S. G. HULING. Thermally activated persulfate oxidation regeneration of NOM- and MTBE- spent granular activated carbon. Presented at The 16th International Conference on Advanced Oxication Technologies for Treatment of Water, Air and Soil (AOTs-16), San Diego, CA, November 15 - 18, 2010.
Impact/Purpose:
The goal of this study was to investigate the feasibility of persulfate-driven oxidation of natural organic matter (NOM)-spent GAC.
Description:
Chemical oxidation is a developing technology used to regenerate contaminant-spent GAC. Chemical regeneration of GAC represents a viable option to thermal regeneration methods that are energy intensive resulting in significant consumption of fossil fuels and production of greenhouse gases. The goal of this study was to investigate the feasibility of persulfate-driven oxidation of natural organic matter (NOM)-spent GAC. Persulfate oxidation reactions generate acidic species (e.g., HSO4-) and high concentrations of sulfate in the regeneration solution. For this reason, process parameters and dependent variables investigated in this study also include (1) oxidative/acidic treatment and sulfate accumulation effects on NOM sorption, and (2) pH adjustments used to elute sulfate residuals for the recovery of NOM sorption capacity.