Biodegradation Property of 8:2 Fluorotelomer Alcohol (8:2 FTOH) under Aerobic/Anoxic/Anaerobic Conditions

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The objective of present research was to clarify the effects of environment conditions of oxygen on FTOHs biodegradation property. The lab-scale batch tests of 8:2 FTOH biodegradation under aerobic/anoxic/anaerobic conditions were conducted with acclimated activated sludge collected from an industrial wastewater treatment plant. The results revealed that 8:2 FTOH biodegradation property differed in aerobic/anoxic/anaerobic conditions. The first-order rate constants of 8:2 FTOH were 6.10 × 10−2, 1.24 × 10−2 and 5.81 × 10−3 [L·g-SS–1·h–1] under aerobic/anoxic/anaerobic conditions, respectively. Within 24 hours, the transformed PFCAs (C4 − C9) moles to the applied 8:2 FTOH were 11.12%, 0.46% and 3.39% under aerobic/anoxic/anaerobic conditions, respectively. Under aerobic condition, PFCAs were remarkably generated. The increased moles of PFOA and PFHpA occupied the applied 8:2 FTOH as 7.87% and 1.29%, respectively. Moreover, the increasing tendency of PFCAs was maintained within 24 hours. The anoxic and anaerobic generation of PFCAs, besides PFOA, were not significant.