Abstract

Aerobic biodegradation of nitrobenzene (NB) produces nitrophenol (NP), which has stronger toxicity than NB. Anaerobic biodegradation of NB produces aniline (AN), which has weaker toxicity, but is a dead-end product in anaerobic conditions. Accumulation of AN should be overcome by coupling anaerobic and aerobic transformations: NB is transformed to AN in an anaerobic zone of the bioreactor, and AN is then transformed in an aerobic zone. A vertical baffled bioreactor (VBBR) was employed for NB biodegradation with a controlled dissolved oxygen (DO) concentration. NB biodegradation was accelerated by simultaneous anaerobic and aerobic transformations, since AN was biotransformed by a mono-oxygenase reaction. Adding exogenous electron donor (acetate) enhanced NB removals when the DO concentration was ∼0.5 mg/L, because the donor accelerated mono-oxygenations of NB and AN. Coupling anaerobic and aerobic transformations can be a valuable strategy for biodegrading organic compounds that undergo aerobic and anaerobic biotransformations.

Original languageEnglish (US)
Pages (from-to)264-269
Number of pages6
JournalJournal of Environmental Management
Volume226
DOIs
StatePublished - Nov 15 2018

Fingerprint

Nitrobenzene
biodegradation
Aniline
Biodegradation
bioreactor
dissolved oxygen
toxicity
oxygenation
biotransformation
Dissolved oxygen
Bioreactors
anoxic conditions
Toxicity
organic compound
acetate
electron
Oxygenation
Organic compounds
Electrons

Keywords

  • Aniline
  • Biotransformation
  • Mono-oxygenation
  • Nitrobenzene
  • Nitrophenol

ASJC Scopus subject areas

  • Environmental Engineering
  • Waste Management and Disposal
  • Management, Monitoring, Policy and Law

Cite this

Simultaneous anaerobic and aerobic transformations of nitrobenzene. / Cao, Lifeng; Zhang, Chenyuan; Zou, Shasha; Zhu, Ge; Li, Naiyu; Zhang, Yongming; Rittmann, Bruce.

In: Journal of Environmental Management, Vol. 226, 15.11.2018, p. 264-269.

Research output: Contribution to journalArticle

Cao, Lifeng ; Zhang, Chenyuan ; Zou, Shasha ; Zhu, Ge ; Li, Naiyu ; Zhang, Yongming ; Rittmann, Bruce. / Simultaneous anaerobic and aerobic transformations of nitrobenzene. In: Journal of Environmental Management. 2018 ; Vol. 226. pp. 264-269.
@article{aa02f6463b3a422db3f069d71195e2e5,
title = "Simultaneous anaerobic and aerobic transformations of nitrobenzene",
abstract = "Aerobic biodegradation of nitrobenzene (NB) produces nitrophenol (NP), which has stronger toxicity than NB. Anaerobic biodegradation of NB produces aniline (AN), which has weaker toxicity, but is a dead-end product in anaerobic conditions. Accumulation of AN should be overcome by coupling anaerobic and aerobic transformations: NB is transformed to AN in an anaerobic zone of the bioreactor, and AN is then transformed in an aerobic zone. A vertical baffled bioreactor (VBBR) was employed for NB biodegradation with a controlled dissolved oxygen (DO) concentration. NB biodegradation was accelerated by simultaneous anaerobic and aerobic transformations, since AN was biotransformed by a mono-oxygenase reaction. Adding exogenous electron donor (acetate) enhanced NB removals when the DO concentration was ∼0.5 mg/L, because the donor accelerated mono-oxygenations of NB and AN. Coupling anaerobic and aerobic transformations can be a valuable strategy for biodegrading organic compounds that undergo aerobic and anaerobic biotransformations.",
keywords = "Aniline, Biotransformation, Mono-oxygenation, Nitrobenzene, Nitrophenol",
author = "Lifeng Cao and Chenyuan Zhang and Shasha Zou and Ge Zhu and Naiyu Li and Yongming Zhang and Bruce Rittmann",
year = "2018",
month = "11",
day = "15",
doi = "10.1016/j.jenvman.2018.08.007",
language = "English (US)",
volume = "226",
pages = "264--269",
journal = "Journal of Environmental Management",
issn = "0301-4797",
publisher = "Academic Press Inc.",

}

TY - JOUR

T1 - Simultaneous anaerobic and aerobic transformations of nitrobenzene

AU - Cao, Lifeng

AU - Zhang, Chenyuan

AU - Zou, Shasha

AU - Zhu, Ge

AU - Li, Naiyu

AU - Zhang, Yongming

AU - Rittmann, Bruce

PY - 2018/11/15

Y1 - 2018/11/15

N2 - Aerobic biodegradation of nitrobenzene (NB) produces nitrophenol (NP), which has stronger toxicity than NB. Anaerobic biodegradation of NB produces aniline (AN), which has weaker toxicity, but is a dead-end product in anaerobic conditions. Accumulation of AN should be overcome by coupling anaerobic and aerobic transformations: NB is transformed to AN in an anaerobic zone of the bioreactor, and AN is then transformed in an aerobic zone. A vertical baffled bioreactor (VBBR) was employed for NB biodegradation with a controlled dissolved oxygen (DO) concentration. NB biodegradation was accelerated by simultaneous anaerobic and aerobic transformations, since AN was biotransformed by a mono-oxygenase reaction. Adding exogenous electron donor (acetate) enhanced NB removals when the DO concentration was ∼0.5 mg/L, because the donor accelerated mono-oxygenations of NB and AN. Coupling anaerobic and aerobic transformations can be a valuable strategy for biodegrading organic compounds that undergo aerobic and anaerobic biotransformations.

AB - Aerobic biodegradation of nitrobenzene (NB) produces nitrophenol (NP), which has stronger toxicity than NB. Anaerobic biodegradation of NB produces aniline (AN), which has weaker toxicity, but is a dead-end product in anaerobic conditions. Accumulation of AN should be overcome by coupling anaerobic and aerobic transformations: NB is transformed to AN in an anaerobic zone of the bioreactor, and AN is then transformed in an aerobic zone. A vertical baffled bioreactor (VBBR) was employed for NB biodegradation with a controlled dissolved oxygen (DO) concentration. NB biodegradation was accelerated by simultaneous anaerobic and aerobic transformations, since AN was biotransformed by a mono-oxygenase reaction. Adding exogenous electron donor (acetate) enhanced NB removals when the DO concentration was ∼0.5 mg/L, because the donor accelerated mono-oxygenations of NB and AN. Coupling anaerobic and aerobic transformations can be a valuable strategy for biodegrading organic compounds that undergo aerobic and anaerobic biotransformations.

KW - Aniline

KW - Biotransformation

KW - Mono-oxygenation

KW - Nitrobenzene

KW - Nitrophenol

UR - http://www.scopus.com/inward/record.url?scp=85053082155&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85053082155&partnerID=8YFLogxK

U2 - 10.1016/j.jenvman.2018.08.007

DO - 10.1016/j.jenvman.2018.08.007

M3 - Article

VL - 226

SP - 264

EP - 269

JO - Journal of Environmental Management

JF - Journal of Environmental Management

SN - 0301-4797

ER -