Microbial toxicity of metal oxide nanoparticles (CuO, NiO, ZnO, and Sb2O3) to Escherichia coli, Bacillus subtilis, and Streptococcus aureus

Baek, Yongwook; An, Youn‐Joo

doi:10.1016/j.scitotenv.2011.01.014

Cited by 617 publications

(321 citation statements)

References 24 publications

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“…Other studies indicate that the toxic effect observed from nCuO strongly correlates with the fraction of NP dissolved in aquatic media (Garner and Keller, 2014;Blinova et al, 2010;Aruoja et al, 2009). In freshwater and marine systems, nCu and nCuO were found to cause some toxicity across a range of toxicological endpoints at concentration < 1 mg/L (Griffitt et al, 2007;Griffitt et al, 2008;Heinlaan et al, 2008;Aruoja et al, 2009;García et al, 2011), while others only found toxicity at greater exposure concentrations (Blinova et al, 2010;Baek and An, 2011).…”

Section: Aquatic Toxicity Studiesmentioning

confidence: 98%

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Comparative environmental fate and toxicity of copper nanomaterials

et al. 2017

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A B S T R A C TGiven increasing use of copper-based nanomaterials, particularly in applications with direct release, it is imperative to understand their human and ecological risks. A comprehensive and systematic approach was used to determine toxicity and fate of several Cu nanoparticles (Cu NPs). When used as pesticides in agriculture, Cu NPs effectively control pests. However, even at low (5-20 mg Cu/plant) doses, there are metabolic effects due to the accumulation of Cu and generation of reactive oxygen species (ROS). Embedded in antifouling paints, Cu NPs are released as dissolved Cu + 2 and in nano-and micron-scale particles. Once released, Cu NPs can rapidly (hours to weeks) oxidize, dissolve, and form CuS and other insoluble Cu compounds, depending on water chemistry (e.g. salinity, alkalinity, organic matter content, presence of sulfide and other complexing ions). More than 95% of Cu released into the environment will enter soil and aquatic sediments, where it may accumulate to potentially toxic levels (> 50-500 μg/L). Toxicity of Cu compounds was generally ranked by high throughput assays as: Cu + 2 > nano Cu(0) > nano Cu(OH) 2 > nano CuO > micron-scale Cu compounds. In addition to ROS generation, Cu NPs can damage DNA plasmids and affect embryo hatching enzymes. Toxic effects are observed at much lower concentrations for aquatic organisms, particularly freshwater daphnids and marine amphipods, than for terrestrial organisms. This knowledge will serve to predict environmental risks, assess impacts, and develop approaches to mitigate harm while promoting beneficial uses of Cu NPs.

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Section: Aquatic Toxicity Studiesmentioning

confidence: 98%

“…A number studies have been conducted on the sensitivity and toxicity of microbes and plants to nCuO, however the majority of these were tested in growth media and not in soil. For example, Baek and An found the 24-hr microbial growth inhibition EC 50 to fall between 28.6 and 65.9 mg/L (Baek and An, 2011).…”

Section: Terrestrial Toxicity Studiesmentioning

confidence: 99%

Comparative environmental fate and toxicity of copper nanomaterials

et al. 2017

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“…The observed concentration-dependent solubility was attributed to increased NP aggregation at higher concentrations. [10] A third study suggested an increased dissolution of Tween coated-Ag NPs after dilution to near environmentally realistic Ag NP concentrations (,400 mg L À1 ) in ultra-high purity water. [11] Here, following advances in sample preparation for microscopy analysis in order to lower concentration detection limits, [12,13] and the use of long path UV-Vis cell cuvettes to monitor poly(vinylpyrrolidinone) (PVP)-coated Ag NPs at nearenvironmentally relevant concentrations (100-1000 mg L À1 ), we highlight that these concentration-dependent behaviours of nanomaterials become even more pronounced at the microgram per litre levels.…”

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confidence: 99%

“…Taking silver as an example, dissolution in seawater is higher at lower concentrations for two reasons: (1) Ag þ binding ligands, such as chloride, bind the aqueous silver ions forming complexes of silver and this drives further dissolution from the NP [14] and (2) smaller aggregate size likely results in the maintenance of higher specific surface area and greater dissolution. [10] Furthermore, the speciation of dissolved silver released from NPs is also concentration-dependent. Fig.…”

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confidence: 99%

The concentration-dependent behaviour of nanoparticles

et al. 2016

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Environmental context. Studies of manufactured nanoparticles (NPs) in the environment have been performed almost exclusively at high NP concentrations. These data lead to misunderstandings related to NP fate and effects at relevant environmental concentrations, which are expected to be low. A better understanding of the concentration-dependent behaviour of NPs will improve our understanding of their fate and effects under environmentally realistic conditions.Abstract. This rapid communication highlights the importance of nanoparticle concentration in determining their environmental fate and behaviour. Notably, two fate processes have been considered: dissolution and aggregation. The decrease in nanoparticle concentration results in increased dissolution and decreased aggregate sizes, inferring higher potential for environmental transport of nanoparticles. The behaviour (e.g, dissolution, aggregation, disaggregation) and fate (e.g. mobility, fugacity, non-transient (sink) or transient source) of nanoparticles (NPs) in environmental and toxicological media have been investigated for over a decade, typically at high NP concentrations (e.g. milligram per litre range) which are not relevant to the environment, [1] resulting in some potentially misleading assumptions that (i) NP behaviour is dominated by aggregation and thus their fate is dominated by sedimentation and removal from the water column, or, in porous media, deposition and removal from the aqueous phase [2] ; (ii) NP dissolution is limited for many NPs and rarely are all NPs dissolved fully in environmental and biological media over relevant timescales [1] and (iii) many NPs therefore impart little or no toxic risk to pelagic organisms as a result of limited NP dissolution and NP removal by aggregation and sedimentation. [3] Several NP groups (e.g. Ag NPs, Cu NPs, Cd NPs, ZnO) may undergo dissolution and release ions with well known toxic effects. [4] These various issues complicate NP risk characterisation and are exacerbated by the general use of high NP concentrations in NP fate, behaviour and ecotoxicological studies. [2,5] Use of high NP concentrations has been motivated by poor detection limits of available analytical techniques (e.g. dynamic light scattering, laser Doppler electrophoresis, UV-Vis spectroscopy) together with enhanced likelihood of observing more pronounced changes and effects at high NP concentrations. [6] Furthermore, most published nanoecotoxicological data are acute exposure studies, which also drive the high concentration selection bias in order to generate measurable biological responses. Many NPs tested for toxicity to aquatic organisms have been non-toxic on acute time scales until they reach unrealistically high exposure concentrations. Clear predictive linkages between unrealistic high acute exposures and more realistic low chronic exposures have not been established for aquatic systems, and are likely to be further complicated by differing concentration-dependent behaviours of NPs.Despite these concerns, little attention ha...

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“…Concerning to microbial toxicity of metal oxide nanoparticles, Baek et al [128] investigated the toxicity of CuO, ZnO and Sb2O3 nanoparticles on S. aureus, E. coli and Bacillus subcillus. CuO nanoparticles were the most toxic because this material significantly reduced the colony forming units, followed by ZnO and Sb2O3 nanoparticles.…”

Section: Relative Toxicity Of Metal Oxide Nanoparticlesmentioning

confidence: 99%

Nanotoxicology of Metal Oxide Nanoparticles

Seabra

Durán

2015

Metals

189

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This review discusses recent advances in the synthesis, characterization and toxicity of metal oxide nanoparticles obtained mainly through biogenic (green) processes. The in vitro and in vivo toxicities of these oxides are discussed including a consideration of the factors important for safe use of these nanomaterials. The toxicities of different metal oxide nanoparticles are compared. The importance of biogenic synthesized metal oxide nanoparticles has been increasing in recent years; however, more studies aimed at better characterizing the potent toxicity of these nanoparticles are still necessary for nanosafely considerations and environmental perspectives. In this context, this review aims to inspire new research in the design of green approaches to obtain metal oxide nanoparticles for biomedical and technological applications and to highlight the critical need to fully investigate the nanotoxicity of these particles. OPEN ACCESSMetals 2015, 5 935

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Microbial toxicity of metal oxide nanoparticles (CuO, NiO, ZnO, and Sb2O3) to Escherichia coli, Bacillus subtilis, and Streptococcus aureus

Cited by 617 publications

References 24 publications

Comparative environmental fate and toxicity of copper nanomaterials

Comparative environmental fate and toxicity of copper nanomaterials

The concentration-dependent behaviour of nanoparticles

Nanotoxicology of Metal Oxide Nanoparticles

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