Ecotoxicity of nano-metal oxides: A case study on daphnia magna

Ecotoxicology ◽  
2019 ◽  
Vol 28 (8) ◽  
pp. 878-889 ◽  
Author(s):  
Monia Renzi ◽  
Andrea Blašković
Keyword(s):  
Metal Oxides ◽  
Daphnia Magna

scholarly journals Action of Surfactants in Driving Ecotoxicity of Microplastic-Nano Metal Oxides Mixtures: A Case Study on Daphnia magna under Different Nutritional Conditions

2021 ◽  
Author(s):  
Cristiana Guerranti ◽  
Serena Anselmi ◽  
Francesca Provenza ◽  
Andrea Blašković ◽  
Monia Renzi
Keyword(s):  
Metal Oxides ◽  
Daphnia Magna ◽  
Model Organism ◽  
Additive Effects ◽  
Simultaneous Presence ◽  
Nutritional Conditions ◽  
Ecotoxicity Tests ◽  
Series Of Experiments ◽  
The Individual

The series of experiments presented in the paper served to clarify the effects of contemporary exposure to surfactant, microplastics (polyethylene and polyvinyl chloride), and nanoparticles (TiO2 and ZnO) on the model organism Daphnia magna. Exposure was evaluated with respect to the age of the organisms (“young”, 24 hours old, and “aged” 10 days old specimens), trophic status (feeding or fasting), and the simultaneous presence of a surfactant. All the above-mentioned substances are present in the wastewater coming from various environmental sources from cosmetic products. The experiments were conducted in compliance with the OECD 202:2004 guideline, which is also a reference for ecotoxicity tests required by REACH. The results showed that surfactants enhance effects of toxicity produced by the exposure to the microplastic + nanoparticle mixtures. The influence due to factors such as nutrition (effect in fasting >> feeding conditions) and the age of individuals (effects in older >> younger animals) is essential. Concerning young individuals, exposure to PE-TiO2 is the most significant in terms of effects produced: it is very significant, especially in the presence of surfactant (both under fasting and feeding conditions). On the contrary, exposure to the PE-Zn mixture shows the minor effects. The comparison with the literature, especially as regards the possibility of interpreting the toxicity trends for the various mixtures with respect to the individual elements that compose them, leads to hypothesize additive effects still to be investigated and confirms the greatest toxicity contribution of TiO2.

Electronic Promotion Effects of Metal Oxides: A Case Study of MnO Impact on Fischer–Tropsch Catalysis

2021 ◽  
Author(s):  
S. S. Gupta ◽  
P. M. Shenai ◽  
J. Meeuwissen ◽  
G. L. Bezemer ◽  
S. Shetty
Keyword(s):  
Metal Oxides ◽  
Fischer Tropsch

Advanced photochemical processes for the manufacture of nanopowders: an evaluation of long-term pilot plant operation

2022 ◽  
Author(s):  
Jan Bárta ◽  
Lenka Procházková ◽  
Michaela Škodová ◽  
Kateřina Děcká ◽  
Xenie Popovič ◽  
...  
Keyword(s):  
Metal Oxides ◽  
Pilot Plant ◽  
Uv Light ◽  
Plant Operation ◽  
Photochemical Processes ◽  
Long Term Experience

Based on our long term experience with the operation of a photochemical pilot plant, we propose an UV light-based technology for syntheses of nano-dimensional metal oxides (case study for ZnO,...

Can mixtures of cyanotoxins represent a risk to the zooplankton? The case study of Daphnia magna Straus exposed to hepatotoxic and neurotoxic cyanobacterial extracts

Harmful Algae ◽  
2014 ◽  
Vol 31 ◽  
pp. 143-152 ◽  
Author(s):  
Emanuela Cristina Freitas ◽  
Carlos Pinheiro ◽  
Odete Rocha ◽  
Susana Loureiro
Keyword(s):  
Daphnia Magna

Bioavailability of HOC depending on the colloidal state of humic substances: A case study with PCB-77 and Daphnia magna

Chemosphere ◽  
2005 ◽  
Vol 61 (2) ◽  
pp. 282-292 ◽  
Author(s):  
T. Gallé ◽  
Ch. Grégoire ◽  
M. Wagner ◽  
R. Bierl
Keyword(s):  
Humic Substances ◽  
Daphnia Magna ◽  
Colloidal State

P-type doping of organic wide band gap materials by transition metal oxides: A case-study on Molybdenum trioxide

2009 ◽  
Vol 10 (5) ◽  
pp. 932-938 ◽  
Author(s):  
Michael Kröger ◽  
Sami Hamwi ◽  
Jens Meyer ◽  
Thomas Riedl ◽  
Wolfgang Kowalsky ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Oxides ◽  
Band Gap ◽  
Transition Metal Oxides ◽  
Molybdenum Trioxide ◽  
Wide Band ◽  
Wide Band Gap ◽  
P Type
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