Abiotic transformation of atrazine in aqueous phase by biogenic bixbyite-type Mn2O3 produced by a soil-derived Mn(II)-oxidizing bacterium of Providencia sp.

Luo, Jun; Ruan, Xiuxiu; Chen, Wuying; Chen, Sha; Ding, Zhexu; Chen, Ang; Li, Ding

doi:10.1016/j.jhazmat.2022.129243

Cited by 7 publications

(3 citation statements)

References 50 publications

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“…The results of SEM-EDS (Fig. 5A-F) showed that, the two kinds of Mn oxides were both in the size range of 40-80 µm with the slippery surfaces, and they were primarily composed of four elements comprising Mn, O, C, and N, suggesting the presence of impurities in addition to Mn and O, as observed previously in other biogenic Mn oxides (Luo et al, 2022;Tran et al, 2018). Generally, biogenic Mn oxides featured their high SSAs in previous studies, such as 49 m 2 /g of bixbyite-like Mn 2 O 3 produced by Bacillus CUA (Zhang et al, 2014), 98 m 2 /g of δ-MnO 2 produced by Pseudomonas putida MnB1 (Villalobos et al, 2003), and 224 m 2 /g of Mn oxides produced by Leptothrix discophora SS-1 (Nelson et al, 1999).…”

Section: Characterization Of Mn Oxides Produced By Strain L3supporting

confidence: 75%

“…1D. As the incubation proceeded, the culture solution of cells displayed a rising trend from pH of 7 within 56 h, gradually reaching to a plateau of pH 9.3 since the 60th h. Such an increasing trend for pH could be attributed to the alkaline metabolites produced constantly in cell metabolism (Luo et al, 2022; LaBauve and Wargo, 2012).…”

Section: Identi Cation Of Bacterial Strain L3mentioning

confidence: 96%

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The formation of bixbyite-type Mn2O3 via pyocyanin-dependent Mn(II) oxidation of soil-derived Pseudomonas aeruginosa

Xue,

Liao,

Tang

et al. 2024

Preprint

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Bacterial Mn(II) oxidation is believed to play a dominant role in accelerating the rate of Mn biomineralization in nature. Commonly, bacteria adopt two ways concerning Mn(II) oxidases and reactive oxygen species to oxidize Mn(II). In this study, a new strategy for bacterial Mn(II) oxidation involving the pyocyanin, a greenish blue phenazine pigment from Pseudomonas aeruginosa, was discovered. To begin with, a bacterial strain L3 was isolate from soils and identified as Pseudomonas aeruginosa, which exhibited the ability of Mn(II) oxidation. Next, the pyocyanin was purified from strain L3 cultures and proven to be involved in Mn(II) oxidation. Particularly, the oxidation of Mn(II) by pyocyanin was dependent on its ambient pH. In comparison with pH of 5 and 7, pyocyanin (the initial value of OD387 was 0.56 at pH 2) showed a stronger capability of oxidizing Mn(II) at pH of 9, reaching 144.03 µg L− 1 of Mn oxides after 108 h of Mn(II) oxidation, while pyocyanin ultimately produced 43.81 µg L− 1 at pH of 7 and 3.32 µg L− 1 at pH of 5, respectively. Further, strain L3 cultures were fractionated into three parts, i.e., the cell culture solution, fermentation supernatant, and cell suspension, and the Mn(II)-oxidizing activity was found to be distributed in the cell culture solution and fermentation supernatant, as evidenced by the formation of blackish glossy Mn oxides. Specifically, in the first half, the rate of Mn(II) oxidation by the fermentation supernatant was higher than that by the cell culture solution, whereas in the second half, the cell culture solution showed the much higher Mn(II)-oxidizing activity than did the fermentation supernatant. Last but not least, the collective results from mineral characterization demonstrated that, the Mn oxides produced by P. aeruginosa strain L3, either by the cell culture solution or by the fermentation supernatant, were bixbyite-type Mn2O3 with poor crystallinity.

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Section: Characterization Of Mn Oxides Produced By Strain L3supporting

confidence: 75%

Section: Identi Cation Of Bacterial Strain L3mentioning

confidence: 96%

The formation of bixbyite-type Mn2O3 via pyocyanin-dependent Mn(II) oxidation of soil-derived Pseudomonas aeruginosa

Xue,

Liao,

Tang

et al. 2024

Preprint

Self Cite

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“…The use of MnOB appears to be an eco-friendly and cheap alternative. To the best of our knowledge, as illustrated in Figure 5, these MOCs that can be degraded include, but are not limited to, antibiotics [68,72], endocrine disruptors [86,87], and pesticides [88]. It implies that the process mediated by MnOB, which has the advantage of combining adsorption and degradation, has a broad spectrum of performance.…”

Section: Control Of Organic Contaminantsmentioning

confidence: 99%

A Review of Manganese-Oxidizing Bacteria (MnOB): Applications, Future Concerns, and Challenges

Cai

Yang

Qiu

et al. 2023

IJERPH

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Groundwater serving as a drinking water resource usually contains manganese ions (Mn2+) that exceed drinking standards. Based on the Mn biogeochemical cycle at the hydrosphere scale, bioprocesses consisting of aeration, biofiltration, and disinfection are well known as a cost-effective and environmentally friendly ecotechnology for removing Mn2+. The design of aeration and biofiltration units, which are critical components, is significantly influenced by coexisting iron and ammonia in groundwater; however, there is no unified standard for optimizing bioprocess operation. In addition to the groundwater purification, it was also found that manganese-oxidizing bacteria (MnOB)-derived biogenic Mn oxides (bioMnOx), a by-product, have a low crystallinity and a relatively high specific surface area; the MnOB supplied with Mn2+ can be developed for contaminated water remediation. As a result, according to previous studies, this paper summarized and provided operational suggestions for the removal of Mn2+ from groundwater. This review also anticipated challenges and future concerns, as well as opportunities for bioMnOx applications. These could improve our understanding of the MnOB group and its practical applications.

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Enhanced peroxymonosulfate activation by biogenic iron-manganese oxide on biochar: Singlet oxygen generation and synergistic mechanism

Hou,

Wang,

Zhang

et al. 2024

Chemical Engineering Journal

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Abiotic transformation of atrazine in aqueous phase by biogenic bixbyite-type Mn2O3 produced by a soil-derived Mn(II)-oxidizing bacterium of Providencia sp.

Cited by 7 publications

References 50 publications

The formation of bixbyite-type Mn2O3 via pyocyanin-dependent Mn(II) oxidation of soil-derived Pseudomonas aeruginosa

The formation of bixbyite-type Mn2O3 via pyocyanin-dependent Mn(II) oxidation of soil-derived Pseudomonas aeruginosa

A Review of Manganese-Oxidizing Bacteria (MnOB): Applications, Future Concerns, and Challenges

Enhanced peroxymonosulfate activation by biogenic iron-manganese oxide on biochar: Singlet oxygen generation and synergistic mechanism

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