The effect of biogenic and chemically manufactured silver nanoparticles on the benthic bacterial communities in river sediments

Welz, Pamela J.; Khan, Nuraan; Prins, Alaric

doi:10.1016/j.scitotenv.2018.06.283

Cited by 23 publications

(8 citation statements)

References 63 publications

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“…81 Interestingly, other studies highlighted how resilience depends on population density and how specific taxa were more sensitive to contamination. 84 3.2. The Planktonic Compartment: Low Exposure to More Reactive Species.…”

Section: Environmental Risk For Aquaticmentioning

confidence: 99%

Aquatic Mesocosm Strategies for the Environmental Fate and Risk Assessment of Engineered Nanomaterials

Carboni

Slomberg

Nassar

et al. 2021

Environ. Sci. Technol.

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In the past decade, mesocosms have emerged as a useful tool for the environmental study of engineered nanomaterials (ENMs) as they can mimic the relevant exposure scenario of contamination. Herein, we analyzed the scientific outcomes of aquatic mesocosm experiments, with regard to their designs, the ENMs tested, and the end points investigated. Several mesocosm designs were consistently applied in the past decade to virtually mimic various contamination scenarios with regard to ecosystem setting as well as ENMs class, dose, and dosing. Statistical analyses were carried out with the literature data to identify the main parameters driving ENM distribution in the mesocosms and the potential risk posed to benthic and planktonic communities as well as global ecosystem responses. These analyses showed that at the end of the exposure, mesocosm size (water volume), experiment duration, and location indoor/outdoor had major roles in defining the ENMs/metal partitioning. Moreover, a higher exposure of the benthic communities is often observed but did not necessarily translate to a higher risk due to the lower hazard posed by transformed ENMs in the sediments (e.g., aggregated, sulfidized). However, planktonic organisms were generally exposed to lower concentrations of potentially more reactive and toxic ENM species. Hence, mesocosms can be complementary tools to existing standard operational procedures for regulatory purposes and environmental fate and risk assessment of ENMs. To date, the research was markedly unbalanced toward the investigation of metal-based ENMs compared to metalloid- and carbon-based ENMs but also nanoenabled products. Future studies are expected to fill this gap, with special regard to high production volume and potentially hazardous ENMs. Finally, to take full advantage of mesocosms, future studies must be carefully planned to incorporate interdisciplinary approaches and ensure that the large data sets produced are fully exploited.

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Section: Environmental Risk For Aquaticmentioning

confidence: 99%

Aquatic Mesocosm Strategies for the Environmental Fate and Risk Assessment of Engineered Nanomaterials

Carboni

Slomberg

Nassar

et al. 2021

Environ. Sci. Technol.

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“…According to other relevant reports, these four bacteria phyla accounted for a large proportion in water and soil (Chopra et al 2001). and they were also the dominant phylum in sediment, although the abundance of each phyla was various in different sediment (Welz et al 2018).…”

Section: Composition Of Bacterial Communities Determined By Illumina Miseqmentioning

confidence: 79%

The Effect of G-C3N4 on Bacterial Community in Sediment of Xiang River Under Tetracycline Pressure

Hu¹,

Peng²,

Chen³

et al. 2021

Preprint

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As photocatalysts applied more and more often to treat pollutants by photocatalytic reactions, they may enter the environment via water spreading. Although there are some investigations about their influence on different organisms, little is known about its impact on the ecological microenvironment. To understand how photocatalysts effect sediment ecological microenvironment in the process of pollution remediation, the impact of typical photocatalyst g-C3N4 (Graphitic carbon nitride) on rivered sediment community polluted by typical antibiotic tetracycline (TC) was investigated. The sediment samples were exposed to different concentrations of TC, g-C3N4 or TC/g-C3N4 (exposed to 60, 120, 180 mg/L TC, or 25, 75, 125 mg/kg g-C3N4, or 25, 75, 125 mg/kg g-C3N4 plus 60, 120, 180 mg/L TC, respectively), and sediment bacterial community were analyzed by Illumina sequencing. The results indicated that the dominant bacterial phyla in the samples were Acidobacteriota, Proteobacteria, Actinobacteriota, Chloroflexi. The diversity and richness of microorganisms in riverbed sediment were increased a little bit by g-C3N4 with different concentrations, which reached the highest value when exposed to 75 mg/kg g-C3N4. g-C3N4 lightly increased the percentage of relative abundance of Cyanobacteria. The bacterial communities’ structure of the samples treated with TC, g-C3N4 or TC/g-C3N4 were distinguishable. g-C3N4 alone had little effect on microbial structure, while TC/g-C3N4 had medium influence and TC had great impact on it. Under TC stress, g-C3N4 slowed down the growth of Cyanobacteria to some extent and restored the changes of bacterial community structure caused by TC, and reduced the residual TC in water body, thus eliminating the side effects of TC. The result shown that g-C3N4 could significantly reduce the residue of TC in riverbed sediment, without affecting the microbial ecology in the environment.

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“…The influence of biogenic and chemically synthesized silver nanoparticles on the structure of benthic bacterial communities was studied. Thermoleophilia bacteria were resistant to both forms of AgNPs, while Koribacteraceae bacteria were sensitive [127]. A comparative toxicity study of chemically and biologically synthesized silver nanoparticles towards the plant Solanum lycopersicum L. showed that biogenic AgNPs were less toxic than the chemically synthesized ones [128].…”

Section: Comparative Efficacy and Toxicity Of Silver Nanoparticles Obtained By Different Methods Of Synthesismentioning

confidence: 99%

Biogenic Silver Nanoparticles: Synthesis and Application as Antibacterial and Antifungal Agents

et al. 2021

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The importance and need for eco-oriented technologies has increased worldwide, which leads to an enhanced development of methods for the synthesis of nanoparticles using biological agents. This review de-scribes the current approaches to the preparation of biogenic silver nanoparticles, using plant extracts and filtrates of fungi and microorganisms. The peculiarities of the synthesis of particles depending on the source of biocomponents are considered as well as physico-morphological, antibacterial and antifungal properties of the resulting nanoparticles which are compared with such properties of silver nanoparticles obtained by chemical synthesis. Special attention is paid to the process of self-assembly of biogenic silver nanoparticles.

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The effect of biogenic and chemically manufactured silver nanoparticles on the benthic bacterial communities in river sediments

Cited by 23 publications

References 63 publications

Aquatic Mesocosm Strategies for the Environmental Fate and Risk Assessment of Engineered Nanomaterials

Aquatic Mesocosm Strategies for the Environmental Fate and Risk Assessment of Engineered Nanomaterials

The Effect of G-C3N4 on Bacterial Community in Sediment of Xiang River Under Tetracycline Pressure

Biogenic Silver Nanoparticles: Synthesis and Application as Antibacterial and Antifungal Agents

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