The removal of selenite and cadmium by immobilized biospheres: Efficiency, mechanisms and bacterial community

Wang, Liangqin; Zeng, Tixian; Liu, Yingjiu; Wang, Guohua; Liu, Jinxiang; Wang, Aijie

doi:10.1016/j.envres.2022.113025

Cited by 9 publications

(2 citation statements)

References 44 publications

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“…Among them, two genes were in pHD0315_2-1 code bile hydrolysis (1) and cobalt-zinc-cadmium resistance genes (1). Paraclostridium strains have been observed expressing multiple antibiotic-resistance genes (e.g., chloramphenicol, tetracycline, and gentamicin) (Liang et al, 2020 ), metal/metalloid (e.g., Se, Hg, As, and Zn) (Wang et al, 2021 ; Zhang et al, 2022 ) or toxic compounds (e.g., ciprofloxacin) (Fang et al, 2021 ) and were also deduced from the genomic coding functions in this study. Importantly, coding genes identified as Listeria LIPI-1-extended proteins in the HD0315_2 genome have been well-characterized for the infection cycle processes of “Internalization,” “Escape from the vacuole,” and “Reinfection” (see Supplementary Figure S3 for details).…”

Section: Resultsmentioning

confidence: 99%

Genomic insights from Paraclostridium bifermentans HD0315_2: General features and pathogenic potential

et al. 2022

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BackgroundParaclostridium bifermentans is the most diverse distributed species of Paraclostridium and can cause fatal human infections under rare conditions. However, its pathogenic mechanisms and adaptation ability behind infections remain unclear. Herein, we reported the complete genome sequence of P. bifermentans HD0315_2 isolated from the feces of a patient with Crohn's disease. Then, we performed genomic analyses to understand its pathogenic mechanisms and adaptation ability.ResultsThe de novo assembly revealed that the HD0315_2 strain carried a circular chromosome of 3.27 Mb and six circular plasmids (19.41 to 139.50 kb). The phylogenomic analysis assigned the HD0315_2 strain as P. bifermentans and reclassified some previously non-P. bifermentans strains into this clade. The general genomic features showed that this species harbored a flexible genomic pool characterized by variable genome length and multiple plasmids. Then, the HD0315_2 strain was predicted as a human pathogen with high probability, and Listeria LIPI-1 virulence proteins were identified on its genome. Besides, abundant antibiotics/metal/stress resistant genes, such as asrABCH, cat, mccF, macB, entS, albA, bcrA, and tetB, were carried by either the genome or the plasmids. Furthermore, we proposed that transposase-directed horizontal gene transfer was responsible for the distribution of multiple copies of the hin gene in the plasmids.ConclusionThe flexible genomic pool of P. bifermentans encodes abundant functions for antimicrobial or oxidative stress resistance, helping it successfully inhabit and adapt to diverse environments. Moreover, P. bifermentans HD0315_2 might infect hosts via a Listeria LIPI-1-like cycle, with the help of a plasmid expressing the Hin DNA invertase to evade host immune responses.

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Section: Resultsmentioning

confidence: 99%

Genomic insights from Paraclostridium bifermentans HD0315_2: General features and pathogenic potential

et al. 2022

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“…The main anthropogenic activities leading to Se pollution are mining, fossil fuel burning, fertilization, and precious metal processing. The concentration of Se(IV) in wastewater ranges from 0.2 to 74 mg/L ( Zhang X et al, 2022 ).…”

Section: Introductionmentioning

confidence: 99%

Selenite elimination via zero-valent iron modified biochar synthesized from tobacco straw and copper slag: Mechanisms and agro-industrial practicality

Luo¹,

Chen²,

Cui³

et al. 2022

Front. Bioeng. Biotechnol.

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Cost-effectively improving the performance of biochar is essential for its large-scale practical application. In this work, the agro-industrial by-products copper slag and tobacco straw were employed for the preparation of modified biochar (CSBC). The obtained CSBC exhibited satisfactory capacity on Se(IV) immobilization of 190.53 mg/g, with surface interactions determined by the monolayer and mainly chemisorption. The removal mechanisms included chemical reduction, electrostatic attraction, co-precipitation, and formation of complexations. Interestingly, the existence of Cu2Se structure after adsorption indicated the involvement of Cu species within Se(IV) elimination. Moreover, the industrial agricultural practicality of CSBC was evaluated by regeneration tests, economic assessment, and pot experiments. The results demonstrate that iron species-modified biochar prepared from two agro-industrial by-products is a promising and feasible candidate for selenite removal from wastewater.

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Phenanthrene Elimination from Soil through the Activation of Peroxymonosulfate by Biogenically Derived Manganese Oxide

Jiang,

Zhang,

et al. 2024

Water Air Soil Pollut

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The removal of selenite and cadmium by immobilized biospheres: Efficiency, mechanisms and bacterial community

Cited by 9 publications

References 44 publications

Genomic insights from Paraclostridium bifermentans HD0315_2: General features and pathogenic potential

Genomic insights from Paraclostridium bifermentans HD0315_2: General features and pathogenic potential

Selenite elimination via zero-valent iron modified biochar synthesized from tobacco straw and copper slag: Mechanisms and agro-industrial practicality

Phenanthrene Elimination from Soil through the Activation of Peroxymonosulfate by Biogenically Derived Manganese Oxide

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