Premium
Metabolism of aniline under different anaerobic electron‐accepting and nutritional conditions
Author(s) -
Alexandra De M.,
O'Connor Owen A.,
Kosson David S.
Publication year - 1994
Publication title -
environmental toxicology and chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.1
H-Index - 171
eISSN - 1552-8618
pISSN - 0730-7268
DOI - 10.1002/etc.5620130207
Subject(s) - denitrifying bacteria , anaerobic exercise , aniline , bicarbonate , chemistry , environmental chemistry , mineralization (soil science) , biodegradation , metabolite , ammonia , denitrification , biochemistry , nitrogen , organic chemistry , biology , physiology
Abstract The biodegradability of aniline was evaluated under two different anaerobic conditions, denitrifying and methano‐genic. In addition, under denitrifying conditions, the influence of bicarbonate was studied. Anaerobic sewage digester sludge and estuarine sediment were used as heterogeneous sources of bacteria. Under anaerobic denitrifying conditions amended with bicarbonate, aniline was completely mineralized to CO 2 and N 2 . After an initial lag period, N 2 recoveries of 74 and 100% were obtained for sludge and sediment cultures, respectively. Under anaerobic denitrifying conditions with no bicarbonate, aniline depletion was observed; however, stoichiometric quantities of N 2 were not produced from mineralization and were in fact inhibited below background controls. Under methanogenic conditions, aniline concentrations remained unchanged for >31 weeks. A metabolite of aniline, 4‐hydroxybenzoate, was detected in bicarbonate‐amended denitrifying cultures.