Environmental Fate of Metal Nanoparticles in Estuarine Environments

Arienzo, Michele; Ferrara, Luciano

doi:10.3390/w14081297

Cited by 9 publications

(4 citation statements)

References 175 publications

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“…Further reports have indicated that the NPs can elevate LC3, which can induce autophagy and/or apoptosis. Studies have shown that the NPs enter the lysosome and trigger the gradual leaching out of Zn +2 in an acidic environment outside the organelle [ 38 , 39 ]. Then, the active radicals can further invade the mitochondria, resulting in apoptosis or necrosis [ 40 ].…”

Section: Discussionmentioning

confidence: 99%

Zinc Oxide Nanoparticles Blunt Potassium-Bromate-Induced Renal Toxicity by Reinforcing the Redox System

et al. 2023

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Potassium bromate (PB) is a general food additive, a significant by-product during water disinfection, and a carcinogen (Class II B). The compound emits toxicity depending on the extent of its exposure and dose through consumable items. The current study targeted disclosing the ameliorative efficacy of zinc oxide nanoparticles (ZnO NPs) prepared by green technology in PB-exposed Swiss albino rats. The rats were separated into six treatment groups: control without any treatment (Group I), PB alone (Group II), ZnO alone (Group III), ZnO NP alone (Group IV), PB + ZnO (Group V), and PB + ZnO NPs (Group VI). The blood and kidney samples were retrieved from the animals after following the treatment plan and kept at −20 °C until further analysis. Contrary to the control (Group I), PB-treated rats (Group II) exhibited a prominent trend in alteration in the established kidney function markers and disturbed redox status. Further, the analysis of the tissue and nuclear DNA also reinforced the biochemical results of the same treatment group. Hitherto, Groups III and IV also showed moderate toxic insults. However, Group VI showed a significant improvement from the PB-induced toxic insults compared to Group II. Hence, the present study revealed the significant therapeutic potential of the NPs against PB-induced nephrotoxicity in vivo, pleading for their usage in medicines having nephrotoxicity as a side effect or in enhancing the safety of the industrial use of PB.

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Section: Discussionmentioning

confidence: 99%

Zinc Oxide Nanoparticles Blunt Potassium-Bromate-Induced Renal Toxicity by Reinforcing the Redox System

et al. 2023

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“…These nanoparticles can reach the environment through runoff after rainfall, through the waste water system, and from direct contact with water (Rajput et al 2020). Ultimate sinks for nanomaterials are likely to be lakes, streams and near-shore environments (Arienzo and Ferrara 2022). Metallic nanoparticles pose particular risks to ecosystems due to their ability to exert toxicity through multiple mechanisms including release of metallic ions, production of reactive oxygen species (ROS) and through physical damage to cells (Venkatasubbu et al 2016;Slavin et al 2017;Zhang et al 2018; Medici et al 2021).…”

Section: Introductionmentioning

confidence: 99%

Interactive Effects of Zinc and Titanium Nanoparticles of Leaf Decomposition in Freshwater Ecosystems

Jabri

Abed

Elshafie

et al. 2023

Preprint

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In conclusion, we observed that titanium nanoparticles inhibited leaf decomposition more strongly than zinc nanoparticles, and that the combination treatments reduced the effects of the titanium. This was opposite to what we initially expected. The nano-titanium reduced bacterial growth, suggesting that this may be one mechanism that could inhibit decomposition. Light may play a role in generation of reactive oxygen species that increase toxicity of the nanoparticles, but effects are complex. Overall, this study highlights the importance of testing the effects of mixtures that are likely to occur in the environment. Metallic nanoparticles are an emerging hazard that will continue to grow as their use expands in the future. Zinc and titanium nanoparticles are used in many consumer and industrial products. Consequently, they are increasingly being detected in the sediments of aquatic ecosystems. Despite their frequent co-occurrence, there is little information on how they interact, although previous studies on cells suggest that nano-titanium may inhibit nano-zinc toxicity by reducing Zn2+ bioavailability. Leaf decomposition is a major source of allochthanous energy in freshwater ecosystems. In this study we measured the effects of zinc and titanium nanoparticles, alone or in combination, on the rate of leaf decomposition. In Experiment 1, leaf discs, produced from senescent leaves of Ficus sycomorus were exposed to either 1, 10 or 100 mg/L of either ZnO or TiO2 nanoparticles, alone or in combination, for six weeks. Mass loss and microbial metabolism were measured at fortnightly intervals and bacterial community composition measured after six weeks using next generation Illumina MiSeq sequencing. In Experiment 2, F. sycomorus leaf discs were exposed for two weeks to10 mg/L ZnO or TiO2 nanoparticles, alone or in combination, both in the light or dark, and in presence or absence of chloramphenicol, a broad spectrum antibacterial, giving a total of 16 treatments. Mass loss, bacterial colony formation, and the C:N ratio of leaf tissue were measured. In experiment 1 there was no evidence that titanium nanoparticles reduced the concentration of Zn2+. After six weeks, there was significantly less mass loss in all titanium nanoparticle treatments, compared with controls, zinc nanoparticles alone, or the combination treatments. Microbial metabolism was initially low, but increased after four weeks, but there were no clear effects of the nanoparticles on oxygen consumption by the microbes. After six weeks, the bacterial communities of leaves treated with 10 and 100 mg/L of the combination treatment and the 100 mg/L zinc nanoparticle treatments, showed a clear separation from other treatments int terms of community composition. The dominant species in the three communities was Bacillus subtillus. In experiment 2, there was greater mass loss in the dark and lower mass loss in treatments containing chloramphenicol. Both nano-titanium and chloramphenicol inhibited bacterial growth, but there were complex three-way interactions between all three factors. The C:N ratio was lowest in controls and highest in the leaves exposed to nano-titanium. There was also an interaction between light and nanoparticle treatment.

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“…3 It is now an indisputable reality that freshwater compartments are thoroughly exposed to these micro-and nanoparticles and become their main repository. 4,5 Thus, the influence of NPL contamination on the freshwater environmental behavior and biological effects needs further investigation.…”

Section: Introductionmentioning

confidence: 99%

Transformations, interactions, and acute biological responses of nanoplastics on mixotrophic microalgae Poterioochromonas malhamensis

Meng¹,

Stoll²,

Liu³

2023

Environ. Sci.: Nano

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Environmental Fate of Metal Nanoparticles in Estuarine Environments

Cited by 9 publications

References 175 publications

Zinc Oxide Nanoparticles Blunt Potassium-Bromate-Induced Renal Toxicity by Reinforcing the Redox System

Zinc Oxide Nanoparticles Blunt Potassium-Bromate-Induced Renal Toxicity by Reinforcing the Redox System

Interactive Effects of Zinc and Titanium Nanoparticles of Leaf Decomposition in Freshwater Ecosystems

Transformations, interactions, and acute biological responses of nanoplastics on mixotrophic microalgae Poterioochromonas malhamensis

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