scholarly journals Exposure medium and particle ageing moderate the toxicological effects of nanomaterials to Daphnia magna over multiple generations: a case for standard test review?

2020 ◽  
Vol 7 (4) ◽  
pp. 1136-1149 ◽  
Author(s):  
Laura-Jayne A. Ellis ◽  
Eugenia Valsami-Jones ◽  
Iseult Lynch
Keyword(s):  
Daphnia Magna ◽  
Aquatic Environment ◽  
Biological Process ◽  
Standard Test ◽  
Engineered Nanomaterials ◽  
Multiple Generations ◽  
Toxicological Effects ◽  
Test Review

Pristine engineered nanomaterials (NMs) entering the aquatic environment become ‘aged’ during their lifetime via chemical, physical and/or biological process.

scholarly journals Application of the multiuse encapsulator agent F-500 for environmental remediation

2014 ◽  
Vol 87 (1) ◽  
Author(s):  
Luigi Pane ◽  
Elisabetta Giacco ◽  
Gian Luigi Mariottini
Keyword(s):  
Risk Assessment ◽  
Daphnia Magna ◽  
Aquatic Environment ◽  
Environmental Remediation ◽  
Assessment Procedure ◽  
Target Species ◽  
Polluted Soils ◽  
Hazard Control ◽  
Ecotoxicological Evaluation ◽  
Control Technologies

In the framework of the Risk Assessment procedure for the ecotoxicological evaluation of compounds used in the aquatic environment, tests with target species must be carried out. This paper reports the results concerning the evaluation of the acute toxicity of F-500 micelle encapsulator (Hazard Control Technologies Inc., Fayetteville, GA, USA) on cladocerans Daphnia magna, with the purpose to verify its compatibility for the aquatic environment and its adequacy for the remediation of soils polluted with hydrocarbons. The obtained results show that by adding F-500 to diesel-polluted soils, the toxicity on Daphnia magna decreases remarkably, indicating the usefulness of this compound to fight the environmental pollution consequent to hydrocarbon dumping.

scholarly journals Chronic Effects of Silver Nanoparticles on Micro-Crustacean Daphnia lumholtzi

2020 ◽  
Vol 36 (2) ◽  
Author(s):  
Tran Thanh Thai ◽  
Pham Thanh Luu ◽  
Ngo Xuan Quang ◽  
Dao Thanh Son
Keyword(s):  
Silver Nanoparticles ◽  
Chronic Toxicity ◽  
Exposure Period ◽  
Control Treatment ◽  
Reproduction Rate ◽  
Daphnia Lumholtzi ◽  
Multiple Generations ◽  
Toxicological Effects ◽  
Chronic Effects ◽  
And Control

This study aimed to enhance our insight on the potential toxicological effects of silver nanoparticles (AgNPs)  into the aquatic environment. To investigate the chronic toxicity of nanoparticles, freshwater micro-crustacean Daphnia lumholtzi was exposed to different concentrations of 0.2, 0.5 µg/l AgNPs, and control, for 21 days. Toxicological endpoints at different growing stages such as the maturation and reproduction were recorded. The reproduction rate of D. lumholtzi exposed to both AgNPs concentrations (0.2 and 0.5 µg/l ) was significantly lower than that of control. In turn, the maturation exposed to both AgNPs concentrations was not significantly different from the control treatment. This result indicates that AgNPs (with a concentration lower than 0.5 µg/l) did not have an adverse effect on the maturation of D. lumholtzi, but AgNPs with a concentration higher than 0.2 caused a toxic effect on the reproduction rate of D. lumholtzi during 21 days of the exposure period. In conclusion, the present results showed that AgNPs have toxic effects on D. lumholtzi and it has the potential to use as good freshwater aquatic zooplankton for assessment on the toxicity of nanomaterials in tropics. The future study should pay more attention to the effect of AgNPs on survival, growth rate, and multiple generations of daphnids to better understand the effects of nanoparticles in general and AgNPs in particular.

Ecotoxicity Effects of Nanomaterials on Aquatic Organisms

2016 ◽  
pp. 330-351 ◽  
Author(s):  
César A Barbero ◽  
Edith Inés Yslas
Keyword(s):  
Adverse Effects ◽  
Surface Charge ◽  
Direct Effect ◽  
Mechanism Of Action ◽  
Aquatic Environment ◽  
Physicochemical Characteristic ◽  
Aquatic Organisms ◽  
Development Stage ◽  
Engineered Nanomaterials ◽  
Toxicity Data

The increasing production and use of engineered nanomaterials raise concerns about inadvertent exposure and the potential for adverse effects on the aquatic environment. The aim of this chapter is focused on studies of nanotoxicity in different models of aquatic organisms and their impact. Moreover, the chapter provides an overview of nanoparticles, their applications, and the potential nanoparticle-induced toxicity in aquatic organisms. The topics discussed in this chapter are the physicochemical characteristic of nanomaterials (size, aggregation, morphology, surface charge, reactivity, dissolution, etc.) and their influence on toxicity. Further, the text discusses the direct effect of nanomaterials on development stage (embryonic and adult) in aquatic organisms, the mechanism of action as well as the toxicity data of nanomaterials in different species.f action as well as the toxicity data of nanomaterials in different species.

Interpreting unique colloidal response of TiO2 nanomaterials to controlled sonication for understanding of their assembly configuration in water

2016 ◽  
Vol 16 (6) ◽  
pp. 1768-1775
Author(s):  
Siyang Wu ◽  
Hyeok Choi
Keyword(s):  
Environmental Conditions ◽  
Aquatic Environment ◽  
Fate And Transport ◽  
Intrinsic Property ◽  
Engineered Nanomaterials ◽  
Time Resolved ◽  
Tio2 Particles ◽  
Transport Behavior ◽  
Tio2 Nanomaterials

It is important to determine the assembly configuration of engineered nanomaterials (ENMs) because assembly configuration influences their fate and transport behavior in the aquatic environment. Aggregated particles are more subject to segregation upon changes of environmental conditions (and vice versa) than agglomerated particles. As a strategic tool for investigating the time-resolved reversible segregating and assembling behavior of ENMs and thus estimating their assembly configuration, a controlled sonication process was proposed. It was hypothesized that the unique colloidal response of ENMs to sonication, with respect to changes in size, might be their intrinsic property associated with assembly configuration. As a model ENM, three different TiO2 particles with unique properties (commercial P-25 and UV 100 and home-made (HM) TiO2) were examined with programmed sonication processes under various environmental settings. When they were dispersed in water, all TiO2 particles tested obviously assembled to form much larger clusters. Size of P-25 decreased immediately upon sonication and did not change under the subsequent quiescence step while sizes of UV 100 and HM gradually decreased and then slowly recovered back to their initial sizes. The trend was generally observed in all conditions tested. The unique colloidal response of TiO2 could be explained by its properties associated with assembly configuration.

Eco-toxicological effects of typical pollutants on algae in aquatic environment: a review

2018 ◽  
Vol 122 ◽  
pp. 284-292
Author(s):  
Weihua Zhao ◽  
Liangyuan Zhao ◽  
Xianqiang Tang ◽  
Weijie Guo ◽  
Qingyun Li ◽  
...  
Keyword(s):  
Aquatic Environment ◽  
Toxicological Effects

Oxygen consumption by Daphnia magna Straus as a marker of chemical stress in the aquatic environment

2007 ◽  
Vol preprint (2007) ◽  
pp. 1
Author(s):  
José Carlos Martins ◽  
Martin Saker ◽  
Luis Filipe Oliva Teles ◽  
Vitor Vasconcelos
Keyword(s):  
Oxygen Consumption ◽  
Daphnia Magna ◽  
Aquatic Environment ◽  
Chemical Stress

scholarly journals Acute and Chronic Toxicity of Prothioconazole and its Metabolite Prothioconazole-Desthio To Daphnia Magna

2021 ◽  
Author(s):  
An Xuehua ◽  
Liu Xinju ◽  
Jiang Jinhua ◽  
Wang Feidi ◽  
Lv Lu ◽  
...  
Keyword(s):  
Daphnia Magna ◽  
Chronic Toxicity ◽  
Parent Compound ◽  
Biological Indicators ◽  
Toxicity Tests ◽  
Response Relationship ◽  
Dose Response Relationship ◽  
Toxicological Effects ◽  
Acute And Chronic Toxicity ◽  
Growth And Reproduction

Abstract Prothioconazole (PTC) is a broad-spectrum triazole fungicide. Current research has mainly focused on its efficacy and residues, with few studies on its toxicological effects. This study assessed the effects of PTC, and its metabolite prothioconazole-desthio (PTCd), on the inhibition of activity, growth, and reproduction of Daphnia magna using acute and chronic toxicity tests. Additionally, the dose-response relationship was established to determine sensitive biological indicators. The acute toxicity test shows that the 48 h EC50 of PTC and PTCd to D. magna were 2.82 and 5.19 mg/L, respectively. The chronic toxicity of PTC and PTCd to D. magna were 0.00860 and 0.132 mg/L, respectively, with the parent compound being 15.3 times more toxic than its metabolite. The acute to chronic toxicity ratio (ACR) was calculated using chronic toxicity data, with ACR values of 227 and 27.5 for PTC and PTCd, respectively. These results indicate that both PTC and PTCd affect the growth and reproduction of D. magna, and the toxicity of the parent compound is greater than that of its metabolite. In conclusion, the metabolites of this pesticide have sufficient toxicity to harm D. magna at relevant environmental concentrations, and their environmental risk should not be neglected.

scholarly journals An overview of methods for production and detection of silver nanoparticles, with emphasis on their fate and toxicological effects on human, soil, and aquatic environment

2021 ◽  
Vol 10 (1) ◽  
pp. 954-977
Author(s):  
Mohamed Mohamady Ghobashy ◽  
Mohamed Abd Elkodous ◽  
Soha Hamdy Shabaka ◽  
Sherif A. Younis ◽  
Dalal Mohamed Alshangiti ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Environmental Factors ◽  
Aquatic Environment ◽  
Future Research ◽  
Toxicity Mechanism ◽  
Detection Techniques ◽  
Toxicological Effects

Abstract Silver nanoparticles (AgNPs) have been extensively used in various industries; however, this is accompanied by several implications to humans and the environment. This review focuses on different aspects of AgNPs including the production and detection techniques, their fate, and dynamics in response to different environmental factors. In addition, this review illustrates the toxicity mechanism and the interaction of AgNPs with different matrices, such as aquatic environment, soil, crops, and humans. Reduction measures and future research are discussed.

Toxicological Effects of Carbon Nanotubes

2015 ◽  
pp. 333-348
Author(s):  
James C. Bonner
Keyword(s):  
Carbon Nanotubes ◽  
Lung Fibrosis ◽  
Cultured Cells ◽  
Economic Benefits ◽  
Engineered Nanomaterials ◽  
Granuloma Formation ◽  
Rodent Models ◽  
Toxicological Effects ◽  
Asbestos Fibers ◽  
Carcinogenic Effects

The rapidly evolving field of nanotechnology offers many potential societal and economic benefits. Carbon Nanotubes (CNTs) are one of the most widely produced engineered nanomaterials and have diverse applications in engineering, electronics, and medicine. They have also been extensively investigated for their toxicological properties. Studies with rodents indicate that CNTs can cause lung fibrosis or granuloma formation, exacerbate pre-existing respiratory disease, cause injury to the sensitive pleural lining of the lungs, and have systemic immunosuppressive effects. CNTs have also been reported to cause genotoxic effects on cultured cells. The fiber-like structure of CNTs has led to comparisons with asbestos fibers; yet the debate over whether CNTs cause mesothelioma remains highly controversial, and evidence thus far is lacking. The aim of this chapter is to overview the evidence in rodent models that CNTs cause lung disease and to discuss the potential of CNTs to cause adverse immune, fibrogenic, or carcinogenic effects in humans as a result of occupational, consumer, or environmental exposure.

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