Though there has been a dramatic decrease in anthropogenic CFCs, they are still having a significant effect on global warming by further compounding the feedback release from their aquatic environment sink. Core samples from marine and terrestrial sites were assessed for their pore water mineral composition and their microbial metabolic in situ enhanced oxidant spiked bioremediation of halo hydrocarbons (HCs). The rates of HC degradation eluded in an anaerobic chamber with oxygen and carbon dioxide gas sensors, the headspace gases were elucidated by GC/MS. The mechanistic HCs degradation pathway can be eluded to by oxidation-reduction potential (ORP) of the environment and its pH, shedding light on in situ metal oxidation states’ and the potential microbial communities principle. Catabolic oxidants and the bacterial succession order, following submergence of a sediment, directly matches the order of decreasing potential for the corresponding redox couples: O2 /H2O, NO3−/ N2, MnO2(s) / Mn2+, Fe(OH)3(s) –/Fe2+, SO42-/HS− and CH2O/CH4. This succession allows the selected spiking of sectioned core sediment with microbial oxidants or minerals to illicit enhanced microbial activity towards HCs. Release of the halide ion from HCs were monitored by HPLC-IC and 9 F NMR and GC/MS following the volatile organic degradation by-products.

Sediment core depth profile enhanced degradation of CFCs by biotic and abiotic in-situ stimulation

255th National Meeting (2018)

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