Anaerobic biodegradation of naphthalene, phenanthrene, and biphenyl by a denitrifying enrichment culture

Anaerobic Biodegradation of Aromatic Hydrocarbons: Pathways and Prospects

“…Rockne et al [2000] and Strand [1998, 2001] found that naphthalene and phenan-threne could be degraded by a denitrifying enrichment culture originally derived from creosote-contaminated soil. Radiolabel recoveries detected incorporation of carbon from 14 C-hydrocarbon into biomass and production of 14 CO 2 confirmed metabolism [Rockne and Strand, 2001]. However, the degree of mineralization varied considerably between substrates, with only partial mineralization of naphthalene (17% oxidized to 14 CO 2 ) versus 96% of phenanthrene; likewise, the proportion of PAHcarbon incorporated into biomass varied between substrates, with naphthalene contributing the most to biomass-carbon.…”

The behaviors and fate of polycyclic aromatic hydrocarbons (PAHs) in a coking wastewater treatment plant

“…Table SM-1). Under anaerobic conditions, PAHs could be degraded by bacteria with alternative electron acceptors other than oxgen, such as nitrate, sulfate and Fe(III) (Coates et al, 1996;Rockne and Strand, 2001;Chang et al, 2008;Li et al, 2010). The aerobic tanks contributed to over 62% of total aqueous elimination of lower PAHs in biological stage.…”

Effect of pyrene on denitrification activity and abundance and composition of denitrifying community in an agricultural soil

“…Meanwhile, pyrene concentration of the EC50 treatment declined during the 7-day incubation. Previous studies showed that PAHs could be degraded under denitrifying conditions by using nitrate as electron acceptors, a mechanism named co-metabolism (Ambrosoli et al, 2005;Coates et al, 1997;McNally et al, 1998;Rockne and Strand, 2001;Rockne et al, 2000). Pollutant degradation and transformation to more volatile or less toxic forms were commonly used strategies for bacteria to reduce the toxicity of their immediate surroundings (Ford, 1993).…”