Polycyclic Aromatic Hydrocarbons (PAH) are common environmental pollutants that have been linked to cancerous lesions in bottom fish. In this research, the feasibility of using nitrate as an alternative electron acceptor to stimulate PAH-degradation in anoxic marine sediment was investigated. PAH could be degraded under denitrifying conditions as long as other nutrients were not limiting. The half lives of low molecular weight PAH ranged from approximately 33-88 days. Degradation of high molecular weight PAH was slower, or not observed. Half lives ranged from 143-812 days. Nitrate may be applied to sediments in situ or used in bioreactors to reduce the cost of bioremediation operations ex situ.
Biodegradation of polycyclic aromatic hydrocarbons (PAH) in marine sediment under denitrifying conditions
Jean D. MacRae, Kenneth J. Hall; Biodegradation of polycyclic aromatic hydrocarbons (PAH) in marine sediment under denitrifying conditions. Water Sci Technol 1 December 1998; 38 (11): 177–185. doi: https://doi.org/10.2166/wst.1998.0463
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