Toxicity assessment of ZnO nanoparticles to freshwater microalgae Coelastrella terrestris

2019 ◽  
Vol 26 (26) ◽  
pp. 26991-27001 ◽  
Author(s):  
Pallavi Saxena ◽  
Harish
Keyword(s):  
Zno Nanoparticles ◽  
Toxicity Assessment ◽  
Freshwater Microalgae

scholarly journals Long-Term Toxicity of ZnO Nanoparticles on Scenedesmus rubescens Cultivated in Semi-Batch Mode

Nanomaterials ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 2262
Author(s):  
Andriana F. Aravantinou ◽  
Fytoula Andreou ◽  
Ioannis D. Manariotis
Keyword(s):  
Lipid Content ◽  
Zno Nanoparticles ◽  
Nutrient Removal ◽  
Zno Nps ◽  
Freshwater Microalgae ◽  
Batch Mode ◽  
Algal Lipid ◽  
Scenedesmus Rubescens ◽  
Microalgae Growth

The scope of this study was to investigate the toxic effects of zinc oxide (ZnO) nanoparticles (NPs) on freshwater microalgae, in long-term semi-batch feeding mode at two different hydraulic retention times (HRTs) (20 and 40 days). A freshwater microalgae, Scenedesmus rubescens, was employed and exposed to a semi-continuous supply of ZnO NPs at a low concentration of 0.081 mg/L for a period of 28 d. Experiments were conducted under controlled environmental conditions. Τhe impact of ZnO NPs on S. rubescens, which was assessed in terms of nutrient removal, biomass growth, and algal lipid content. Semi-batch mode cultures showed that low ZnO NP concentrations at an HRT of 40 d did not have any negative effect on microalgae growth after the fourth day of culture. In contrast, algal growth was inhibited up to 17.5% at an HRT of 20 d in the presence of ZnO NPs. This might be attributed to the higher flow rate applied and ZnO NPs load. A positive correlation between nutrient removal and microalgae growth was observed. The algal lipid content was, in most cases, higher in the presence of ZnO NPs at both HRTs, indicating that even low ZnO NPs concentration cause stress resulting in higher lipid content.

scholarly journals Fe-Doped ZnO nanoparticle toxicity: assessment by a new generation of nanodescriptors

Nanoscale ◽  
2018 ◽  
Vol 10 (46) ◽  
pp. 21985-21993 ◽  
Author(s):  
Jaanus Burk ◽  
Lauri Sikk ◽  
Peeter Burk ◽  
Bella B. Manshian ◽  
Stefaan J. Soenen ◽  
...  
Keyword(s):  
Zno Nanoparticles ◽  
Toxicity Assessment ◽  
Zno Nanoparticle ◽  
Nanoparticle Toxicity ◽  
Doped Zno ◽  
New Generation

Toxicity and cancer-killing potency of Fe-doped ZnO nanoparticles can be reliably modelled using atomistic nanodescriptors.

Toxicity assessment and antibacterial activity of ZnO nanoparticles

2021 ◽  
pp. 511-552
Author(s):  
Ankush Agrawal ◽  
Ankita Sharma ◽  
Garima Awasthi ◽  
Kamakshi ◽  
Anjali Awasthi ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Zno Nanoparticles ◽  
Toxicity Assessment

Toxicity assessment and comparison of the land snail's Cornu aspersum responses against CuO nanoparticles and ZnO nanoparticles

2020 ◽  
Vol 236 ◽  
pp. 108817 ◽  
Author(s):  
Konstantinos Feidantsis ◽  
Stavros Kalogiannis ◽  
Angela Marinoni ◽  
Areti-Maria Vasilogianni ◽  
Christina Gkanatsiou ◽  
...  
Keyword(s):  
Zno Nanoparticles ◽  
Toxicity Assessment ◽  
Cuo Nanoparticles ◽  
Cornu Aspersum

Effect of carbofuran on quantitative and qualitative alterations in haemolymph of larva of Oryctes rhinoceros L. (Coleoptera: Scarabaeidae)

ENTOMON ◽  
2020 ◽  
Vol 44 (4) ◽  
pp. 293-300
Author(s):  
V.S. Salini
Keyword(s):  
Oral Route ◽  
Toxicity Assessment ◽  
Haematological Parameters ◽  
Oryctes Rhinoceros ◽  
Total Haemocyte Count ◽  
Differential Haemocyte Count ◽  
Third Instar Larvae

Investigation to evaluate the toxicity of carbofuran pesticides on haematological parameters of third instar larvae of Oryctes rhinoceros L. Indicated alterations in total haemocyte count and differential haemocyte count for toxicity assessment. Various doses of carbofuran (0.05g, 0.010g and 0.015 g) applied on insect through oral route and its impact after 24 hours of its application revealed that various doses of carbofuran exert specific alterations in both total and differential haemocytes of insect haemolymph.

Polycaprolactone based membranes for the degradation of diclofenac present in water samples using ZnO nanoparticles as the active agent

MRS Advances ◽  
2020 ◽  
Vol 5 (61) ◽  
pp. 3153-3161
Author(s):  
Marco Antonio Juárez Sánchez ◽  
Miguel Ángel Meléndez Lira ◽  
Celestino Odín Rodríguez Nava
Keyword(s):  
Zno Nanoparticles ◽  
Wastewater Treatment Plants ◽  
Active Agent ◽  
Heterogeneous Photocatalysis ◽  
Nano Particles ◽  
Electrical Characteristics ◽  
Unit Operation ◽  
Fields Of Study ◽  
Drug Contamination ◽  
Positive Results

AbstractDrug contamination in water is one of the current fields of study. Since 1990, the presence of drugs in drinking water has been a concern to scientists and public. In Mexico, these organic compounds are not efficiently removed in wastewater treatment plants; therefore, alternative methodologies have been studied that allow these compounds to have a high percentage of degradation or be completely degraded. One example of these techniques is heterogeneous photocatalysis which has obtained positive results in the degradation of drugs using ZnO nanoparticles. These are commonly selected for their electrical characteristics, even though they disperse in water and an additional unit operation is required to separate them from the liquid medium. To eliminate drugs with nano particles in a single stage, polycaprolactone-based membranes with adhered ZnO nanoparticles, by means of electrospinning, were prepared to degrade drugs such as diclofenac. The technique used has shown to efficiently break down diclofenac in 4 hours according to the capillary electrophoresis readings.

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