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Study on the mechanism of regulating micromolar Fe utilization and promoting denitrification by guanosine monophosphate (GMP) based multi-signal functional material Hematin@Fe/GMP

Author(s): Hao Y; Guo T; Li H; Liu W; Chen Z; Wang X; Guo J;

A novel multi-signal functional material consisting of Hematin, Fe, and guanosine monophosphate (GMP) was successfully constructed (Hematin@Fe/GMP) to enhance denitrification efficiency based on the signal network regulation of electron transfer, micromolar Fe utilization, and microbial community. Hematin@Fe/GMP enhanced nitrate reduction rate by 2.33-fol ...

Article GUID: 39657473


Amorphous Cu/Fe nanoparticles with tandem intracellular and extracellular electron capacity for enhancing denitrification performance and recovery of co-contaminant suppressed denitrification

Author(s): Fu J; Guo T; Li H; Liu W; Chen Z; Wang X; Guo J;

In this study, a functionally stable insoluble Cu/Fe nanoparticles (Cu/Fe NPs) were synthesized and applied denitrification with different contaminants. The results showed that 50 mg/L Cu/Fe NPs increased NO3--N reduction rate up to 14.3 mg/(L·h) about 3 folds compared with the control system (4.7 mg/(L·h)), and Cu/Fe NPs exhibited excellent restorative e ...

Article GUID: 39542060


Fe/GMP functional nanomaterial enhancing the denitrification efficiency by bi-signal regulation: Electron transfer and microbial community

Author(s): Hao Y; Guo T; Li H; Liu W; Chen Z; Zhang W; Wang X; Guo J;

A novel functional nanomaterial composed of guanosine monophosphate (GMP) and Fe enhanced denitrification efficiency by regulating electron transfer and microbial community. Fe/GMP enhanced nitrate (NO3-) degradation rates by 3.00-fold in serum vial batch experiments, with a rate constant of 17.39 mg/(L·h) in sequencing batch reactor. Fe/GMP-mediated inte ...

Article GUID: 39326537


Photoactivation and conformational gating for manganese binding and oxidation in bacterial reaction centers

Author(s): Samaei A; Deshmukh SS; Protheroe C; Nyéki S; Tremblay-Ethier RA; Kálmán L;

The influence of illumination history of native bacterial reaction centers (BRCs) on the ability of binding and photo-induced oxidation of manganous ions was investigated in the pH range between 8.0 and 9.4. Binding of manganous ions to a buried site required 6 to 11-fold longer incubation periods, depending on the pH, in dark-adapted BRCs than in BRCs th ...

Article GUID: 36216075


Te(IV) bioreduction in the sulfur autotrophic reactor: Performance, kinetics and synergistic mechanism

Author(s): He Y; Guo J; Song Y; Chen Z; Lu C; Han Y; Li H; Hou Y;

A laboratory-scale sulfur autotrophic reactor (SAR) was first constructed for treating tellurite [Te(IV)] wastewater. The SAR had excellent Te(IV) bioreduction efficiency (90-96%) at 5-30 mg/L and conformed to the First-order kinetic model. The Te(IV) bioreduction was elaborated deeply from extracellular polymeric substances (EPS) functions, microbial met ...

Article GUID: 35228038


Bioinspired facilitation of intrinsically conductive polymers: Mediating intra/extracellular electron transfer and microbial metabolism in denitrification

Author(s): Guo T; Lu C; Chen Z; Song Y; Li H; Han Y; Hou Y; Zhong Y; Guo J;

Intrinsically conductive polymers, polyaniline and polyaniline sulfonate (PASAni) were used to explore their effect on denitrification. Denitrification was accelerated 1.90 times by 2 mM PASAni and the possible mechanisms were mainly attributed to the accelerated electron transfer and the enhanced microbial metabolism activity. Intracellular electron tran ...

Article GUID: 35124084


Multifaceted synergistic electron transfer mechanism for enhancing denitrification by clay minerals

Author(s): Zhang Y; Lu C; Chen Z; Song Y; Li H; Han Y; Hou Y; Guo J;

The performance and mechanism of denitrification enhanced by three clay minerals, montmorillonite (Mmt), illite and kaolinite, were first studied. Batch experiments indicated that clay minerals significantly enhanced denitrification at certain concentrations (0.1-1 g/L). The denitrification rate with 1 g/L Mmt was increased by 5.0-fold. The mechanism of c ...

Article GUID: 34915014


Acceleration mechanism of bioavailable Fe(Ⅲ) on Te(IV) bioreduction of Shewanella oneidensis MR-1: Promotion of electron generation, electron transfer and energy level.

Author(s): He Y, Guo J, Song Y, Chen Z, Lu C, Han Y, Li H, Hou Y, Zhao R

The release of highly toxic tellurite into the aquatic environment poses significant environmental risks. The acceleration mechanism and tellurium nanorods (TeNPs) characteristics with bioavailable ferric citrate (Fe(III)) were investigated in the tellurite (Te(IV)) bioreduction. Experiments showed that 5?mM Fe(III) increased the Te(IV) bioreduction rate ...

Article GUID: 32853890


Tuning the redox potential of the primary electron donor in bacterial reaction centers by manganese binding and light-induced structural changes.

Author(s): Deshmukh SS, Kálmán L

Biochim Biophys Acta Bioenerg. 2020 Aug 07;:148285 Authors: Deshmukh SS, Kálmán L

Article GUID: 32777306


Bound detergent molecules in bacterial reaction centers facilitate detection of tetryl explosive.

Author(s): Modafferi D, Zazubovich V, Kálmán L

Photosynth Res. 2020 Jul 06;: Authors: Modafferi D, Zazubovich V, Kálmán L

Article GUID: 32632533


Effect and ameliorative mechanisms of polyoxometalates on the denitrification under sulfonamide antibiotics stress.

Author(s): Guo H, Chen Z, Lu C, Guo J, Li H, Song Y, Han Y, Hou Y

Bioresour Technol. 2020 Feb 22;305:123073 Authors: Guo H, Chen Z, Lu C, Guo J, Li H, Song Y, Han Y, Hou Y

Article GUID: 32145698


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