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ABSTRACT: Effect of zero-valent iron-coupled biochar on the composition of autotrophic microflora in bioreactors for remediation of uranium-contaminated groundwater

PROVIDER: PRJNA878945 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR21517850_1.fastq.gz	Fastqsanger.gz
	SRR21517850_2.fastq.gz	Fastqsanger.gz
	SRR21517851_1.fastq.gz	Fastqsanger.gz
	SRR21517851_2.fastq.gz	Fastqsanger.gz
	SRR21517852_1.fastq.gz	Fastqsanger.gz

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Project description:Geobacteraceae transfer electrons from a donor such as acetate to an electron acceptor such as Fe(III) or U(VI). Geobacter uraniireducens is found in uranium-contaminated sites and plays an important role in in situ bioremediation. In this experiment, gene expression was compared between G. uraniireducens cultures grown in sediments from a uranium contaminated site amended with acetate and cultures grown in acetate/fumarate medium. Keywords: two-condition comparison

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Project description:Nanoscale zero-valent iron changes microbial co-occurrence pattern in pentachlorophenol-contaminated soil

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Project description:Nanoscale zero valent iron (nZVI) is used to remediate aquifers polluted by organochlorines or heavy metals and was also suggested to eliminate harmful algal blooms. nZVI can therefore affect microorganisms in the vicinity of the application area, including microalgae. However, studies on early transcriptomic effects of microalgae after exposure to nZVI are rare. Here, we described the early physiological and transcriptomic response of the freshwater ecological indicator green microalga, Raphidocelis subcapitata ATCC 22662, to 100 mg/L of reactive nZVI and non-reactive nano-magnetite (nFe3O4). The combined effect of shading and the release of total iron from nZVI posed a short-term inhibition effect leading to 15 % of deformed cells and cytosol leakage, while cells viability increased after 24 h. nZVI triggered a more pronounced transcriptomic response with (7380 differentially expressed genes [DEGs]) compared to nFe3O4 (4601 DEGs) after 1 h. nZVI, but not nFe3O4 increased the expression of genes function in DNA repair and replication, while deactivated carbohydrate-energy metabolisms, mitochondria signaling, and transmembrane ion transport. This study highlights an early fate assessment of algal cells under nZVI and nFe3O4 exposure using next-generation risk assessment methods and will serve as valuable information for safe and sustainable application of nZVI in water remediation.

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