Anaerobic biodegradation of catechol by sediment microorganisms: Interactive roles of N reduction and S cycling

Xiong Zheng, Chen Zhou, Zhuolin Liu, Min Long, Yi Hao Luo, Tengfei Chen, Aura Ontiveros-Valencia, Bruce Rittmann

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Catechol is one of the central intermediates in the aerobic biodegradation of numerous benzene-based aromatic contaminants derived from coal and petroleum sources as a result of unsustainable production processes. In O 2 -limiting environments, such as aquifers and sediments, accumulation of dead-end and inhibitory catechol can lead to a complete shutdown of further biodegradation. Thus, O 2 -independent catechol biotransformation plays an essential role in biodegrading aromatic contaminants in anoxic zones. In this study, we investigated redox processes and microbial community change during anaerobic catechol biodegradation coupled to nitrate and sulfate reductions by a sediment consortium. Denitrifiers and sulfate-reducing bacteria initially oxidized soluble non-catechol organics present in the sediments as electron donors to drive denitrification and sulfate reduction, respectively. Once the non-catechol organics were depleted, catechol was activated by denitrifiers capable of benzoyl-CoA metabolism. Subsequent ring cleavage and mineralization produced electrons and energy that could be coupled by denitrifiers and sulfate reducers to nitrate and sulfate reduction to N 2 and sulfide, respectively. When nitrate and sulfate coexisted, accumulation of sulfide stimulated sulfide oxidizers to growth via sulfide oxidation coupled to nitrate reduction to ammonium and nitrite. The resulting buildup of nitrite triggered abiotic conversion of catechol to a significantly less bioavailable form, probably 1,2-benzoquinone, that eventually blocked the biological process of catechol mineralization. This study documents the interactions of the several anaerobic microbial groups during catechol biodegradation with multiple endogenous electron acceptors and provides baseline for sustainable in-situ bioremediation of aromatic-contaminated environments.

Original languageEnglish (US)
Pages (from-to)80-89
Number of pages10
JournalJournal of Cleaner Production
Volume230
DOIs
StatePublished - Sep 1 2019
Externally publishedYes

Fingerprint

Biodegradation
Microorganisms
biodegradation
Sediments
microorganism
sulfate
sulfide
Nitrates
nitrate
sediment
electron
nitrite
Electrons
mineralization
Impurities
pollutant
sulfate-reducing bacterium
biotransformation
Bioremediation
bioremediation

Keywords

  • Aromatic contamination
  • Catechol activation
  • Denitrification
  • DNRA
  • Nitrite-driven catechol deactivation
  • Sulfur cycling

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Environmental Science(all)
  • Strategy and Management
  • Industrial and Manufacturing Engineering

Cite this

Anaerobic biodegradation of catechol by sediment microorganisms : Interactive roles of N reduction and S cycling. / Zheng, Xiong; Zhou, Chen; Liu, Zhuolin; Long, Min; Luo, Yi Hao; Chen, Tengfei; Ontiveros-Valencia, Aura; Rittmann, Bruce.

In: Journal of Cleaner Production, Vol. 230, 01.09.2019, p. 80-89.

Research output: Contribution to journalArticle

Zheng, Xiong ; Zhou, Chen ; Liu, Zhuolin ; Long, Min ; Luo, Yi Hao ; Chen, Tengfei ; Ontiveros-Valencia, Aura ; Rittmann, Bruce. / Anaerobic biodegradation of catechol by sediment microorganisms : Interactive roles of N reduction and S cycling. In: Journal of Cleaner Production. 2019 ; Vol. 230. pp. 80-89.
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