Environmental safety data on CuO and TiO2 nanoparticles for multiple algal species in natural water: Filling the data gaps for risk assessment

Joonas, Elise; Aruoja, Villem; Olli, Kalle; Kahru, Anne

doi:10.1016/j.scitotenv.2018.07.446

Cited by 49 publications

(15 citation statements)

References 43 publications

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“…8 They were effective in killing a wide range of bacterial pathogens involved in nosocomial infections. 9 They are also a powerful biocide toward fungi 10 and various types of algae, 11 and they present antiviral capabilities. 9 Their antimicrobial activity relies on the ability to release metallic ions and the extent of their surface area.…”

Section: Introductionmentioning

confidence: 99%

Novel Route of Synthesis of PCL-CuONPs Composites With Antimicrobial Properties

2019

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Nanoparticles of metals can be toxic to bacteria, showing biocidal activities at low concentrations. Metal, oxide, or compounds based on copper are applied like antimicrobial agents. The capacity of integration of metallic nanoparticles in polymer matrices has improved the antimicrobial behavior, resulting in the search for composites with increased bactericidal properties. A polycaprolactone (PCL) film polymer with copper oxide nanoparticles (CuONPs) was prepared. Dynamic light scattering analysis showed the sizes from 88 to 97 nm of CuONPs. Scanning electron microscopy (SEM) revealed CuONPs with semispherical shapes with diameter 35 nm. The prepared PCL-CuONPs exhibited a nanoporous structure by SEM. The antibacterial applicability of the composite was evaluated to determine the minimum inhibitory concentration in 6 different bacteria and the experimental tests were carried by disk diffusion and spectrophotometric methods. The PCL-CuONPs exhibit a considerable antibacterial effect in gram-positive bacteria in contrast to gram-negative bacteria. The preparation of PCL-CuONPs was simple, fast, and low cost for practical application as wound dressings.

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Section: Introductionmentioning

confidence: 99%

Novel Route of Synthesis of PCL-CuONPs Composites With Antimicrobial Properties

2019

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“…A possible explanation for this might be the different exposure time chosen. According to Joonas (2019), 72 h EC 50 of nano-CuO (22-25 nm) to the diatom Fistulifera pelliculosa was 0.65 mg/L, which educed that F. pelliculosa was a more sensitive marine algae than the two diatoms used in our research. Details of comparison were listed in Table 2.…”

Section: Effect Of Cu 2+ Nano-cu and Nano-cuo On The Growth Of Micrmentioning

confidence: 58%

Effects of copper ions and copper nanomaterials on the output of amino acids from marine algae

Huang

Zhou

Zhao

et al. 2021

Preprint

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In this study, the effects of different copper’s forms, metal salt (Cu2+), nano-metal (nano-Cu) and nano-metal oxide (nano-CuO), were tested on two marine algae named Skeletonema costatum and Nitzschia closterium. During a 96-hour exposure to nanoparticles (NPs) and salt, cell number, Cu2+ concentration in the culture medium, morphology and intracellular amino acids was measured to assess the toxicity of those copper materials and the toxicity mechanism of NPs. It was found that the toxicity of Cu2+, nano-Cu and nano-CuO on marine phytoplankton decreased in order. The EC50 values of Cu2+ and nano-Cu for S. costatum and N. closterium ranged from 0.356 to 0.991 mg/L and 0.663 to 2.455 mg/L, respectively. Nano-Cu inhibited the growth of marine phytoplankton mainly by releasing Cu2+, however, nano-CuO mainly produced toxic effects on microalgae through the effect of NPs. The secretion of extracellular polymeric substances by microalgae could be another possible reason for nano-Cu and nano-CuO to impose implications for microalgae. S. costatum was more sensitive to copper than N. closterium. Cu2+, nano-Cu and nano-CuO all reduced the total output of algae-derived amino acids by affecting the growth of phytoplankton and per-cell amino acids. This manuscript is of important implications to fill the data gaps for nano-Cu and nano-CuO risk assessment on marine algae.

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“…; (ii) environmental variables, including pH, water hardness, and alkalinity, presence and concentrations of different ligands from natural and anthropogenic origins, which may influence chemical and physicochemical speciation; and (iii) biological systems, including habitat, feeding pattern, etc. Abundant information on the environmental implications of ENPs can be found in recent review papers (Lead et al, 2018;Joonas et al, 2019;Mortimer and Holden, 2019;Kögel et al, 2020;Slaveykova et al, 2020).…”

Section: Nanoparticle Cycling In the Environmentmentioning

confidence: 99%

Natural Nanoparticles, Anthropogenic Nanoparticles, Where Is the Frontier?

Lespès

Faucher

Slaveykova

2020

Front. Environ. Sci.

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Nano-sized particles are important components of the Earth biogeochemical system. However, in the Anthropocene, the human activities disturbed their natural cycle and increased their abundance by (i) affecting their emissions and releases; (ii) altering the environmental processes involving nanoparticles; and (iii) introducing anthropogenic nanoparticles (ANPs). Intentionally or unintentionally released, the occurrence of the anthropogenic particles in the environment is continuously rising. Both natural and anthropogenic nanoparticles are recognized as important carriers for trace elements and organic micropollutants and key modifiers of their transport, speciation, bioavailability, and effects in the environment. Nevertheless, currently they are considered separately, despite the necessity of more integrated, broader, and non-sectorial perspective taking together particles of different origins and various processes likely to generate and involve them. The present paper provides a perspective on the environmental processes involving anthropogenic and natural nanoparticles (NNPs) and discusses the role of human activities in nanoparticle cycling, as well as the necessity to bridge the divide between the NNPs and ANPs. The discussion will be supported by the examples of our own research to ask, if there is still a frontier between NNPs and ANPs?

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Environmental safety data on CuO and TiO2 nanoparticles for multiple algal species in natural water: Filling the data gaps for risk assessment

Cited by 49 publications

References 43 publications

Novel Route of Synthesis of PCL-CuONPs Composites With Antimicrobial Properties

Novel Route of Synthesis of PCL-CuONPs Composites With Antimicrobial Properties

Effects of copper ions and copper nanomaterials on the output of amino acids from marine algae

Natural Nanoparticles, Anthropogenic Nanoparticles, Where Is the Frontier?

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