title: Analysis of biodegradation by-products of nitrobenzene and aniline mixture by a cold-tolerant microbial consortium.
abstract: A cold-tolerant microbial consortium, which can use nitrobenzene (NB) and aniline (AN) as sole carbon, nitrogen and energy sources, was isolated from an NB and AN contaminated site. Pilot 454 pyrosequencing analysis of the consortium showed that it was mainly made up of Pseudomonas spp. (98%). At 10 °C, the consortium degraded the mixture of 50mg/L NB and 50mg/L AN at a similar rate as those achieved at 20 °C and 30 °C. The biodegradation by-products with different initial NB and AN concentrations at 10 °C were analyzed. Azobenzene, azoxybenzene and acetanilide were observed in NB and AN mixtures degradation. These by-products are generated by the reaction between different intermediates resulting from the NB and AN degradation as well as the parent compounds. To the best of our knowledge, this is the first report confirming the by-products of NB and AN mixture biodegradation by a cold-tolerant microbial consortium.
authors.affiliation: Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China.
authors.forename: Na
authors.initials: N
authors.lastname: Liu
authors.forename: Haijun
authors.initials: H
authors.lastname: Li
authors.forename: Feng
authors.initials: F
authors.lastname: Ding
authors.forename: Zongming
authors.initials: Z
authors.lastname: Xiu
authors.forename: Peng
authors.initials: P
authors.lastname: Liu
authors.forename: Ying
authors.initials: Y
authors.lastname: Yu
mesh_terms: D000814:Aniline Compounds / Q000032:analysis*; D001673:Biodegradation, Environmental; D003080:Cold Temperature; D007700:Kinetics; D059013:Microbial Consortia; D009578:Nitrobenzenes / Q000032:analysis*; D010802:Phylogeny; D016133:Polymerase Chain Reaction; D011549:Pseudomonas / Q000378:metabolism; D012336:RNA, Ribosomal, 16S / Q000032:analysis; D017422:Sequence Analysis, DNA; D012989:Soil Pollutants / Q000032:analysis*; D013696:Temperature; D013997:Time Factors; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D000814:Aniline Compounds; D009578:Nitrobenzenes; D012336:RNA, Ribosomal, 16S; D012989:Soil Pollutants; D014874:Water Pollutants, Chemical; C036077:nitrobenzene; C023650:aniline
keywords: Aniline; Biodegradation; By-products; Cold-tolerant consortium; Nitrobenzene