Iron reduction characteristics and kinetic analysis of Comamonas testosteroni Y1: a potential iron-reduction bacteria

Li, Huawei; Ding, Shaoxuan; Song, Wanchao; Zhang, Yonghui; Ding, Jincheng; Lü, Jie

doi:10.1016/j.bej.2021.108256

Cited by 17 publications

(12 citation statements)

References 41 publications

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“…Zero-valent iron could induce microbial bioreduction in neutral or alkaline aquatic ecosystems . As a critical inorganic electron donor, the iron ions released into the water would advance the biological activity of microorganisms. ,, Previous studies have shown that the release of iron ions could promote the synthesis of denitrifying functional genes and further stimulate the expression of relative enzymes. ,,, Inorganic electron donors could induce changes in the structure of the microorganism’s community, leading to the evolution of the function of the microbial community by some facultative denitrifying bacteria occupying a more dominant ecological niche. , …”

Section: Resultsmentioning

confidence: 99%

“…10,41,44 The lognormal model was the best niche to adopt the denitrifying bacterial community enrichment assignment based on Akaike's Information Criterion (AIC) value analysis comparison (an AIC value lower presents a better niche assignment) (Figure 4). 43,44 The AIC values were 15736.3 versus 18073.0 (Figure 4d), 14513.4 versus 24299.0 (Figure 4e), 13115.7 versus 16570.3 (Figure 4f), and 15515.7 versus 16264.5 (Figure 4g), respectively, for the nirS-type, nirK-type, napA-type, and nosZtype bacterial consortia for IACA reactors compared with C reactors. The lognormal model indicated that denitrifying bacteria in IACA reactors exhibited obvious competition for exogenous electron donors and strengthened their advantageous ecological niche.…”

Section: Denitrification Bacterial Consortium Analysis By Illumina Miseqmentioning

confidence: 99%

“…29,32,42 Previous studies have shown that the release of iron ions could promote the synthesis of denitrifying functional genes and further stimulate the expression of relative enzymes. 2,26,43,44 Inorganic electron donors could induce changes in the structure of the microorganism's community, leading to the evolution of the function of the microbial community by some facultative denitrifying bacteria occupying a more dominant ecological niche. 2,43 pH and DO play a crucial role in the aerobic denitrification processes.…”

Section: Denitrification Bacterial Consortium Analysis By Illumina Miseqmentioning

confidence: 99%

“…2,26,43,44 Inorganic electron donors could induce changes in the structure of the microorganism's community, leading to the evolution of the function of the microbial community by some facultative denitrifying bacteria occupying a more dominant ecological niche. 2,43 pH and DO play a crucial role in the aerobic denitrification processes. 1,44,45 Figure S1a−c presents the shift of DO concentrations in the control rectors.…”

Section: Denitrification Bacterial Consortium Analysis By Illumina Miseqmentioning

confidence: 99%

“…The niche width model indicates that the species with extensive niche extents are less influenced by the fluctuations in the environment and have higher environmental fitness, which are named generalized species. 43 The broader niche width means the generalized species have stronger competitiveness. 43 The niche width of the denitrifying bacterial communities in the IACA was higher than that of the C reactors.…”

Section: Removal Of Organic Mattermentioning

confidence: 99%

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Aerobic Denitrification Enhanced by Immobilized Slow-Released Iron/Activated Carbon Aquagel Treatment of Low C/N Micropolluted Water: Denitrification Performance, Denitrifying Bacterial Community Co-occurrence, and Implications

Zhang

Chen

et al. 2023

Environ. Sci. Technol.

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The key limiting factors in the treatment of low C/N micropolluted water bodies are deficient essential electron donors for nitrogen removal processes. An iron/activated carbon aquagel (IACA) was synthesized as a slowly released inorganic electron donor to enhance aerobic denitrification performance in low C/N micropolluted water treatment. The denitrification efficiency in IACA reactors was enhanced by more than 56.72% and the highest of 94.12% was accomplished compared with those of the control reactors. Moreover, the CODMn removal efficiency improved by more than 34.32% in IACA reactors. The Illumina MiSeq sequencing consequence explained that the denitrifying bacteria with facultative denitrification, iron oxidation, and iron reduction function were located in the dominant species niches in the IACA reactors (e.g., Pseudomonas, Leptothrix, and Comamonas). The diversity and richness of the denitrifying bacterial communities were enhanced in the IACA reactors. Network analysis indicated that aerobic denitrifying bacterial consortia in IACA reactors presented a more complicated co-occurrence structure. The IACA reactors presented the potential for long-term denitrification operation. This study affords a pathway to utilize IACA, promoting aerobic denitrification during low C/N micropolluted water body treatment.

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Section: Resultsmentioning

confidence: 99%

Section: Denitrification Bacterial Consortium Analysis By Illumina Miseqmentioning

confidence: 99%

Section: Denitrification Bacterial Consortium Analysis By Illumina Miseqmentioning

confidence: 99%

Section: Denitrification Bacterial Consortium Analysis By Illumina Miseqmentioning

confidence: 99%

Section: Removal Of Organic Mattermentioning

confidence: 99%

See 3 more Smart Citations

Aerobic Denitrification Enhanced by Immobilized Slow-Released Iron/Activated Carbon Aquagel Treatment of Low C/N Micropolluted Water: Denitrification Performance, Denitrifying Bacterial Community Co-occurrence, and Implications

Zhang

Chen

et al. 2023

Environ. Sci. Technol.

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Synergistic mechanism of physical chemistry and acid bacteria: Product evolution of sulphides during tunnel mining

He,

Ren,

et al. 2024

Geological Journal

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Tunnel waste constitutes a prevalent by‐product of highway construction in high‐altitude mountainous and hilly regions. Sulphide minerals exhibit a unique distribution pattern within the alpine hills. Consequently, tunnel excavation can disrupt the stability of these sulphide minerals, rendering the tunnel waste susceptible to generating secondary environmental hazards during stockpiling. This research delves into the migration and transformation dynamics of potential environmental pollutants in tunnel waste through geoenvironmental simulation techniques. Controlled variables were employed to simulate various conditions, including surface illumination, internal anaerobiosis, water content and aerobic environments. The study's findings indicate that the presence of pyrite in the waste stream primarily drives the secondary contamination of the tunnel waste. Pyrite within the slag tends to react and form sulphuric acid in the stockpile environment, thus creating an acidic milieu that exacerbates the release of existing contaminants. The emergence of an anaerobic environment and a photocatalytic system composed of Fe/Ti substances in the waste stream serves to further accelerate pollutant release. This study thoroughly investigates the primary causes of environmental pollution during the stockpiling of tunnel slag and assesses the potential environmental impact scenarios. The outcomes of this research offer substantial theoretical and empirical support for the management of slag generated during the tunnel construction process.

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Reconstructing historic bog iron ore deposits in the Bourtangermoor, a former raised bog in the Netherlands

Nauta,

Dijksma,

Candel

et al. 2024

CATENA

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Iron reduction characteristics and kinetic analysis of Comamonas testosteroni Y1: a potential iron-reduction bacteria

Cited by 17 publications

References 41 publications

Aerobic Denitrification Enhanced by Immobilized Slow-Released Iron/Activated Carbon Aquagel Treatment of Low C/N Micropolluted Water: Denitrification Performance, Denitrifying Bacterial Community Co-occurrence, and Implications

Aerobic Denitrification Enhanced by Immobilized Slow-Released Iron/Activated Carbon Aquagel Treatment of Low C/N Micropolluted Water: Denitrification Performance, Denitrifying Bacterial Community Co-occurrence, and Implications

Synergistic mechanism of physical chemistry and acid bacteria: Product evolution of sulphides during tunnel mining

Reconstructing historic bog iron ore deposits in the Bourtangermoor, a former raised bog in the Netherlands

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