Effect of nickel (II) on the performance of anodic electroactive biofilms in bioelectrochemical systems

Amanze, Charles; Zheng, Xiaoya; Anaman, Richmond; Wu, Xiaoyan; Fosua, Bridget Ataa; Xiao, Shanshan; Xia, Mingchen; Ai, Chenbing; Yu, Runlan; Wu, Xueling; Shen, Li; Liu, Yuandong; Li, Jiaokun; Dolgor, Erdenechimeg; Zeng, Weimin

doi:10.1016/j.watres.2022.118889

Cited by 27 publications

(8 citation statements)

References 105 publications

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“…The nirK , nirS , and nrfA genes related to denitrification and DNRA were assessed separately by the primers 876–1040, R3 cd-Cd3af, and F2aw-R1 . The pilA , OmcZ , OmcS , and OmcE genes associated with EET were quantified using primers specified in Table S1 . The 16S rRNA gene (338F and 806R) was selected as the reference.…”

Section: Methodsmentioning

confidence: 99%

“…26 The pilA, OmcZ, OmcS, and OmcE genes associated with EET were quantified using primers specified in Table S1. 27 The 16S rRNA gene (338F and 806R) was selected as the reference. RNA was extracted using a total RNA extractor (B511311, Sangon Biotech, Shanghai, China) and then converted into cDNA using a cDNA Reverse Transcription Kit (BeyoRT II, Beyotime, Shanghai, China) according to the manufacturer's instructions.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

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Fe(0)-Dissimilatory Nitrate Reduction to Ammonium for Autotrophic Recovery of Reactive Nitrogen

Wu,

Zhang,

Wan

et al. 2023

Environ. Sci. Technol.

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Bioreduction of nitrate to value-added ammonium is a potentially sustainable strategy to recycle nutrients from wastewater. Here, we have proven the feasibility of the reduction of autotrophic nitrate to ammonium with electrons extracted from Fe(0). Using a Geobacter-dominated anodic biofilm as an inoculum, we achieved nitrate-to-ammonium efficiency up to 90 ± 3% with a nitrate reduction rate of 35 ± 1.3 mg N/d/L. An electron acceptor instead of an inoculum greatly influenced the Fe(0)dissimilatory nitrate reduction to ammonium (DNRA), where nitrite as the electron acceptor provided an effective selective pressure to enrich Geobacter from initial 5 to 56%. The DNRA repressing denitrification was demonstrated by the reverse tendencies of upregulated nrfA and downregulated nirS gene transcription. This finding provides a new route for autotrophic nitrate removal and recycling from water, which has a broader implication on biogeochemical nitrogen and iron cycling.

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Section: Methodsmentioning

confidence: 99%

Section: ■ Materials and Methodsmentioning

confidence: 99%

Fe(0)-Dissimilatory Nitrate Reduction to Ammonium for Autotrophic Recovery of Reactive Nitrogen

Wu,

Zhang,

Wan

et al. 2023

Environ. Sci. Technol.

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“…Today, BES are constrained by the poor performance of their cathodic oxygen–reduction reaction (ORR) and microbial electron transfer (MET), resulting in unsatisfactory electron-transfer capacity and energetics . Conventional cathode catalysts often are noble metals [e.g., platinum (Pt)], which are expensive and account for at least 50% of the capital expenditures for BES, thus leading to unacceptable economics. , …”

Section: Introductionmentioning

confidence: 99%

“…Leveraging the specific redox processes inherent in biological elements, this innovative technology effectively addresses waste and wastewater challenges while simultaneously recovering valuable energy and chemicals. Notably, BES exhibit significantly lower environmental impacts compared to conventional electrochemical methodologies . The development of BES has been the culmination of extensive research, resulting in their widespread adoption for various purposes, such as bioremediation, wastewater treatment, resource recovery, environmental monitoring, and carbon sequestration .…”

Section: Introductionmentioning

confidence: 99%

“…Notably, BES exhibit significantly lower environmental impacts compared to conventional electrochemical methodologies. 2 The development of BES has been the culmination of extensive research, resulting in their widespread adoption for various purposes, such as bioremediation, wastewater treatment, resource recovery, environmental monitoring, and carbon sequestration. 3 Today, BES are constrained by the poor performance of their cathodic oxygen−reduction reaction (ORR) and microbial electron transfer (MET), resulting in unsatisfactory electron-transfer capacity and energetics.…”

Section: ■ Introductionmentioning

confidence: 99%

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Biogenic Melanin-Modified Graphene as a Cathode Catalyst Yields Greater Bioelectrochemical Performances by Stimulating Oxygen–Reduction and Microbial Electron Transfer

Wu,

Liang,

Zhou

et al. 2023

ACS EST Water

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Bioelectrochemical systems (BES) can recover energy from organic-bearing waste streams, but their use has been stymied by poor electron transfer from the cathode. Redoxactive electron shuttles could stimulate electron transfer provided that they are compatible with the exoelectrogenic bacteria. This work evaluated melanin-modified carboxylated graphene (M/CG) as a novel cathode catalyst in a microbial fuel cell. Biogenic melanin catalysts (i.e., bio-M/CG) significantly increased bioelectricity production due to its abundant pyrrole N, which lowered chargetransfer resistance and, thus, promoted the cathodic oxygen− reduction reaction (ORR). The high content of pyrrole N in the bio-M/CG catalyst also enriched exoelectrogens, such as Azospirillum, Chryseobacterium, and Azoarcus, which accounted for over 50% of the total abundance of bacteria in biofilms on the anode. Moreover, the functional genes of key enzymes involved in microbial electron transfer (MET) were increased by the bio-M/CG catalyst. These data confirm that the bio-M/CG catalyst improved the bioelectrochemical performance via synergetic promotion of cathodic ORR and microbial electron transfer, thus providing a new alternative for advancing BES technology. This work highlights the potential application of melanin in enhancing cathodic oxygen−reduction reaction kinetics and improving microbial electron transfer in BES. This study emphasizes the promising application of melanin in enhancing the ORR kinetics and improving MET in BES, offering exciting prospects for future sustainable and environmentally friendly applications.

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Electroactive microorganism-assisted remediation of groundwater contamination: Advances and challenges

Feng

Yang

Zhang

et al. 2023

Bioresource Technology

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Effect of nickel (II) on the performance of anodic electroactive biofilms in bioelectrochemical systems

Cited by 27 publications

References 105 publications

Fe(0)-Dissimilatory Nitrate Reduction to Ammonium for Autotrophic Recovery of Reactive Nitrogen

Fe(0)-Dissimilatory Nitrate Reduction to Ammonium for Autotrophic Recovery of Reactive Nitrogen

Biogenic Melanin-Modified Graphene as a Cathode Catalyst Yields Greater Bioelectrochemical Performances by Stimulating Oxygen–Reduction and Microbial Electron Transfer

Electroactive microorganism-assisted remediation of groundwater contamination: Advances and challenges

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