Characteristics of EPS from Pseudomonas aeruginosa and Alcaligenes faecalis under Cd(II) stress: changes in chemical components and adsorption performance

Lian, Zeyang; Yang, Zhen; Song, Weifeng; Sun, Mengge; Gan, Yu; Bai, Xiaoyong

doi:10.1007/s11356-022-21114-z

Cited by 13 publications

(1 citation statement)

References 49 publications

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“…Previous studies have shown that the carboxyl groups are closely related to adsorption. In addition, studies have shown that under cadmium stress, Pseudomonas aeruginosa and Alcaligenes faecalis can increase the proportion of carbon–oxygen double bonds and carboxyl groups, thus improving their ability to coordinate with metals (Lian et al., 2022 ). Therefore, the elevated proportion of carboxy–oxygen in Pd/ ∆SO4317 may contribute to its superior adsorption capacity and the higher content of Pd compared to other catalysts.…”

Section: Resultsmentioning

confidence: 99%

Insights into the biosynthesis of palladium nanoparticles for oxygen reduction reaction by genetically engineered bacteria of Shewanella oneidensisMR‐1

Li,

Huang,

Tong

et al. 2024

Microbial Biotechnology

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Owing to the increasing need for green synthesis and environmental protection, the utilization of biological organism‐derived carbons as supports for noble‐metal electrocatalysts has garnered public interest. Nevertheless, the mechanism by which microorganisms generate nanometals has not been fully understood yet. In the present study, we used genetically engineered bacteria of Shewanella oneidensis MR‐1 (∆SO4317, ∆SO4320, ∆SO0618 and ∆SO3745) to explore the effect of surface substances including biofilm‐associated protein (bpfA), protein secreted by type I secretion systems (TISS) and type II secretion systems (T2SS), and lipopolysaccharide in microbial synthesis of metal nanoparticles. Results showed Pd/∆SO4317 (the catalyst prepared with the mutant ∆SO4317) shows better performance than other biocatalysts and commercial Pd/C, where the mass activity (MA) and specific activity (SA) of Pd/∆SO4317 are 3.1 and 2.1 times higher than those of commercial Pd/C, reaching 257.49 A g−1 and 6.85 A m−2 respectively. It has been found that the exceptional performance is attributed to the smallest particle size and the presence of abundant functional groups. Additionally, the absence of biofilms has been identified as a crucial factor in the formation of high‐quality bio‐Pd. Because the absence of biofilm can minimize metal agglomeration, resulting in uniform particle size dispersion. These findings provide valuable mechanical insights into the generation of biogenic metal nanoparticles and show potential industrial and environmental applications, especially in accelerating oxygen reduction reactions.

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Section: Resultsmentioning

confidence: 99%