@article{01JYNZ7AYCD92007CXR40NSEYS,
  abstract     = {{Organic micropollutants (OMPs) occur in natural aquatic environments at trace concentrations with suspected adverse effects on the ecosystem and human health. Microbial biodegradation plays a crucial role in OMPelimination from drinking water resources. However, long-term OMP-biodegradation remains challenging since the metabolic activity of degrading strains is restricted by energy-limited conditions in treatment systems. Molecular hydrogen (H2) has been identified as a universally available energy source utilized by various bacteria under nutrient-starved conditions, and it can be hypothesized that H2 might also support OMP-degrading microbes when other energy carriers are scarce. The potential of H2 as a supporting energy source for OMPdegradation was tested by examining its effect on the biodegradation of 2,6-dichlorobenzamide (BAM) by Aminobacter niigataensis MSH1 and on the physiological status of the MSH1 cells during both nongrowth-linked (500 mu g BAM/L) and growth-linked (10,000 mu g BAM/L) regimes. MSH1 cells used as inoculum were either not or pre-exposed to H2 and were harvested at different growth phases. During the nongrowth-linked BAM biodegradation, MSH1 pre-exposed to H2 exhibited a 1.2 to 1.5-fold higher initial specific BAM biodegradation rate, resulting in more rapid BAM removal, likely due to the retention of more metabolically active cells, as suggested by a cell vitality assay. During the growth-linked biodegradation, MSH1 pre-exposed to H2 demonstrated accelerated growth with a 1.5-fold higher maximum specific growth rate, which coincided with an improved BAM removal. The positive effects of H2 were only evident for MSH1 cells harvested either at the stationary and/ or starvation phase. Evidence of H2 metabolism was supported by H2consumption measurements. Collectively, this study reveals that microbial H2 metabolism enables OMP-degrading bacteria to sustain metabolic activity under starvation conditions, offering a novel strategy to enhance long-term OMP-biodegradation.}},
  articleno    = {{124052}},
  author       = {{Liu, Baiqing and Jia, Mingsheng and Nauwynck, Wannes and Wang, Jinsong and Kundu, Kankana and Springael, Dirk and Boon, Nico}},
  issn         = {{0043-1354}},
  journal      = {{WATER RESEARCH}},
  keywords     = {{Organic micropollutant biodegradation,Hydrogen metabolism,Cell metabolic activities,Starvation conditions,Additional energy sources,2,6-dichlorobenzamide (BAM),POLLUTANT 2,6-DICHLOROBENZAMIDE BAM,METABOLITE 2,6-DICHLOROBENZAMIDE,HERBICIDE DICHLOBENIL,ENERGY-SOURCE,SAND FILTER,GROUNDWATER,BIODEGRADATION,MINERALIZATION,ENVIRONMENT,GROWTH}},
  language     = {{eng}},
  pages        = {{11}},
  title        = {{Hydrogen-powered bacteria enhance organic micropollutant degradation under starvation conditions}},
  url          = {{http://doi.org/10.1016/j.watres.2025.124052}},
  volume       = {{285}},
  year         = {{2025}},
}

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