Degradation of p-fluoronitrobenzene in biological and bioelectrochemical systems: Differences in kinetics, pathways, and microbial community evolutions

作者：Feng, Huajun; Wang, Yanfeng; Zhang, Xueqin; Shen, Dongsheng; Li, Na; Chen, Wei; Huang, Bin; Liang, Yuxiang; Zhou, Yuyang^*

来源：Chemical Engineering Journal, 2017, 314: 232-239.

DOI：10.1016/j.cej.2016.12.097

• p-Fluoronitrobenzene
• Bioelectrochemical system
• Biodegradation
• Kinetic
• Pathway
• Microbial community evolution

Biodegradation of p-fluoronitrobenzene (p-FNB) regardless of effective p-FNB removal in a bioelectro-chemical system (BES) was achieved for the first time in a biological system (BS). p-FNB degradation showed different kinetics, pathways, and microbial community evolutions in the two systems. About 36 d were required before 100% p-FNB removal in the BSp-FNB, while only 18 d were required in the BESp-FNB. Moreover, the reaction rate constant for p-FNB removal in the BESp-FNB was 1.625 times that in the BSp-FNB. The reduction of nitro groups was the key step for p-FNB removal in the BESp-FNB However, defluorination was the first step for direct biodegradation of p-FNB in the BSp-FNB. Microbial community analysis showed that the dominant bacteria in the BESp-FNB (20.8% Anaerolineae, 15.9% Flavobacteriia, and 14.8% ot-proteobacteria) differed greatly from those in the BSp-FNB (32.8% Flavobacteriia, 24.1% Clostridia and 19.2% Ignavibacteria). In the BSp-FNB, some aerobic microorganisms responsible for direct p-FNB biodegradation were enriched, while p-FA-degrading microorganisms were dominant in the BESp-FNB.

• 出版日期2017-4-15
• 单位浙江工商大学