Nanoparticles Ecotoxicity on <i>Daphnia magna</i>

Khoshnood, Reza Jalili; Jaafarzadeh, Nematollah; Jamili, Shahla; Farshchi, Parvin; Taghavi, Lobat

doi:10.1515/trser-2015-0085

Cited by 7 publications

(10 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We decided to test LC10 allowing exposure temporal lenght of 96 h. Selected doses were respectively 1.12 and 113.18 mg/L for n-ZnO and n-TiO 2 . Our choices are consistent with the literature during an 8:16 dark/light exposure cycle tested under fasting conditions (Khoshnood et al 2016). Surfactant (Triton X-100, CAS n. 9002-93-1) was tested at 0.001% v/v as reported by the literature (Frydkjaer et al 2017).…”

Section: Experimental Designsupporting

confidence: 64%

“…Recent studies define ecotoxicity of nanoparticles on D. magna (Handy et al 2008). Furthermore, Khoshnood et al (2016), reported LC10, LC50, LC90, safety factors, and safe application rate (Jaafarzadeh et al 2013) for n-ZnO and n-TiO 2 evidencing that tested nanoparticles may have acute dose-dependent ecotoxicological effects. After the exposure to metal-oxide nanoparticle LC10 of n-TiO 2 (24 h) was about 1/100 less than n-ZnO (Khoshnood et al 2016).…”

Section: Direct Toxicitymentioning

confidence: 99%

See 1 more Smart Citation

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

Renzi¹,

Blašković²

2019

Ecotoxicology

View full text Add to dashboard Cite

In Europe REACH framework directive imposes data acquisition concerning toxicity on acquatic species before the commercialization of chemicals to assess environmental risks. According to official methods, exposure tests are performed under in vitro and standardized conditions: OECD's guideline rules external variables such as water type, feeding conditions, and exposure time. As consequence, such obtained results could be different from effects observed in natural environments. This study collects effects within 24-96 h of exposure to nano metal-oxides (ZnO, TiO 2 )onD. magna obtained by the exposure under standard OECD conditions comparing them with results obtained by the exposure under more similar conditions to natural environment (i.e. mixture, feeding). High doses exposure determines gas-bubble disease. Animals exposed to LC10 actively ingest nanoparticles under both fasting and feeding conditions. Furthermore, body burial by a coat of nanoparticles thicker in mixtures than in single dispersions was recorded. Furthermore, results show that: (i) effects increase over time; (ii) n-ZnO results less effective than n-TiO 2 in both single dispersion, and mixture; (iii) the presence of surfactant increases toxicity of nanoparticles; (iv) immobilization is a more sensitive endpoint than mortality; (v) feeding increases test sensitiveness improving differences among treated and controls till 96 h and allowing longer exposure times than standard OECD test. As general remark, this study provides evidence that in vitro ecotoxicological results obtained under standardized OECD conditions could be significant different to animals' responses under natural (feeding and mixtures) exposure conditions.

show abstract

Section: Experimental Designsupporting

confidence: 64%

Section: Direct Toxicitymentioning

confidence: 99%

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

Renzi¹,

Blašković²

2019

Ecotoxicology

View full text Add to dashboard Cite

show abstract

“…The mortality rate was below 50% after a 24-h incubation with nano-copper solutions in each of the tested samples, so the LC 50 is certainly higher than 1 mg/L. Our results are consistent with previously published studies on the influence of CuO NPs on Daphnia magna , which indicate the value of LC 50 = 2.5578 mg/L [55] or even LC 50 = 7.85 mg/L [56]. After a 24-h incubation of the Daphnia pulex in nano-copper solutions it can be assumed that water flea has a defense system that allows it to survive at a concentration of 0.25 mg/L better than in the control sample.…”

Section: Discussionsupporting

confidence: 91%

“…It proves that the toxicity of nanoparticles increases with increasing exposure time and that the toxicity of Cu-NPs is correlated with incubation time. It is confirmed in the study by Khoshnood et al [56] in which LC 50 for D. magna after 24 h of CuO NPs incubation was 7.85 mg/L, and after 48 h of incubation it was LC 50 = 6.62 mg/L.…”

Section: Discussionsupporting

confidence: 67%

The Influence of Available Cu and Au Nanoparticles (NPs) on the Survival of Water Fleas (Daphnia pulex)

Garncarek

Kowalska‐Góralska

Senze

et al. 2019

IJERPH

View full text Add to dashboard Cite

Applications of nanotechnologies in different sectors and everyday items are very promising and their popularity continues to grow. The number of products containing nanoparticles makes environmental exposure to nanoparticles inevitable. The current understanding of the relationships between nanoparticles and the environment is inadequate despite the fast growth of nanotechnologies. The aim of the study was to investigate the influence of copper and gold nanoparticles on Daphnia pulex survival. Our study included 48-h acute toxicity tests and determination of median lethal concentration values (LC50s) for Cu-NPs and Au-NPs. For nano-copper, 24 h LC50 was assumed > 1 mg/L, and 48 h LC50 = 0.5117 mg/L. For nano-gold the LC50 value after 24 h was 0.4027 mg/L, and after 48 h 0.1007 mg/L. The toxicity of nano -gold solutions was thus found to be higher than that of nano-copper. The addition of Cu-NPs at 0.0625 mg/L and 0.125 mg/L caused an increased multiplication of daphnia, while Au-NPs at 1 mg/L was an inhibitor of reproduction.

show abstract

“…Animals were exposed under fasting conditions, selecting immobilization as endpoint and a contact time 24-48 h. Contextually to standard conditions required by OECD, animals were also exposed under feeding conditions and contact time was extended from 24 to 48 h to 96 h as suggested by the literature for tests performed on particulate toxicant [40] performing observations daily starting from T 24 after the initial exposure. Experiments were made during an 8:16 dark/light exposure cycle [31].…”

Section: Experimental Designmentioning

confidence: 99%

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

Guerranti¹,

Anselmi²,

Provenza³

et al. 2022

Surfactants and Detergents - Updates and New Insights

View full text Add to dashboard Cite

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.

show abstract

Nanoparticles Ecotoxicity on Daphnia magna

Cited by 7 publications

References 21 publications

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

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

The Influence of Available Cu and Au Nanoparticles (NPs) on the Survival of Water Fleas (Daphnia pulex)

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

Contact Info

Product

Resources

About