Metagenomics uncovers the effect of nitrogen-doped graphene on anammox consortia and microbial function

Zhang, Baoyong; Sun, Hao; Wang, Na; Sun, Yuankui; Zang, Lihua; Xue, Rong

doi:10.1016/j.biortech.2022.126998

Cited by 12 publications

(2 citation statements)

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“…Elreedy et al (2021) reported that the nitrogen removal rate (NRR) was boosted by 46 ± 3.1% at graphene nanosheets of 10 mg/L . Zhang et al (2022) found that the average nitrogen removal efficiency (NRE) of anammox improved by 17.57% with nitrogen-doped graphene addition . Tomaszewski et al (2019) found that RGO of 15 mg/L could stimulate anammox activity at a low temperature (13 °C) …”

Section: Introductionmentioning

confidence: 99%

“…9 Zhang et al (2022) found that the average nitrogen removal efficiency (NRE) of anammox improved by 17.57% with nitrogen-doped graphene addition. 13 Tomaszewski et al (2019) found that RGO of 15 mg/L could stimulate anammox activity at a low temperature (13 °C). 14 GO is highly regarded for its good colloidal property and low cytotoxicity.…”

Section: Introductionmentioning

confidence: 99%

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Dosage-Dependent Impacts of Graphene Oxide on the Anammox Process: Performance and Mechanism

Xie,

Zou,

Ismail

et al. 2024

ACS EST Eng.

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The effects of various dosages of graphene oxide (GO) on the performance of anammox and the underlying mechanisms are not yet fully understood, necessitating the provision of additional details. In this work, the dosage-dependent impacts of GO on the anammox system were investigated from the perspective of molecular biology analysis. The nitrogen removal efficiency (NRE) continuously increased at 10−100 mg/L GO, and a high nitrogen removal rate (NRR) was obtained at 25 mg/L GO. GO also improved the content of extracellular polymer substance (EPS) and the abundances of hzs and nirS genes. Molecular docking demonstrated that GO had a strong binding with the hydrazine synthase enzyme. Microbial analysis revealed that denitrifying bacteria, such as Denitratisoma and OLB13, were enriched, indicating that the high NRE could be attributed to the synergistic effect between denitrification and anammox processes. The analysis of microbial functions suggested that GO could impact various metabolic activities, such as quorum sensing, extracellular electron transfer, and membrane transport. Above all, this work provided detailed insights into the effects of different GO dosages on the anammox system.

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Section: Introductionmentioning

confidence: 99%