Acute toxicity of Ag and CuO nanoparticle suspensions against Daphnia magna: The importance of their dissolved fraction varying with preparation methods

Jo, Hyun-Jun; Choi, Jae Woo; Lee, Sang Hyup; Hong, Seok Won

doi:10.1016/j.jhazmat.2012.05.066

Cited by 122 publications

(93 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…(ECOTOX Database, 2014) Although there are only a few studies on the toxicity of nCu, 48-h LC 50 ranges from 47 μg/L to 419 μg/L for Ceriodaphnia dubia (Gao et al, 2009;Griffitt et al, 2008) and from 700 μg/L to 1500 μg/L for Danio rerio juveniles and adults (Griffitt et al, 2007;Griffitt et al, 2008). For nCuO, 24-h LC 50 ranges from 470 μg/L to 217 mg/L (Manusadžianas et al, 2012;Heinlaan et al, 2008;Blinova et al, 2010;Gallego et al, 2007), while 24-h EC 50 ranges from 30 μg/L to 126 mg/L across several organisms (Blinova et al, 2010;Mortimer et al, 2011;Kasemets et al, 2009;Mortimer et al, 2010;Jo et al, 2012). This information was used to construct species sensitivity distributions (SSDs) for freshwater organisms (Garner et al, 2015).…”

Section: Aquatic Toxicity Studiesmentioning

confidence: 99%

Comparative environmental fate and toxicity of copper nanomaterials

et al. 2017

View full text Add to dashboard Cite

A B S T R A C TGiven increasing use of copper-based nanomaterials, particularly in applications with direct release, it is imperative to understand their human and ecological risks. A comprehensive and systematic approach was used to determine toxicity and fate of several Cu nanoparticles (Cu NPs). When used as pesticides in agriculture, Cu NPs effectively control pests. However, even at low (5-20 mg Cu/plant) doses, there are metabolic effects due to the accumulation of Cu and generation of reactive oxygen species (ROS). Embedded in antifouling paints, Cu NPs are released as dissolved Cu + 2 and in nano-and micron-scale particles. Once released, Cu NPs can rapidly (hours to weeks) oxidize, dissolve, and form CuS and other insoluble Cu compounds, depending on water chemistry (e.g. salinity, alkalinity, organic matter content, presence of sulfide and other complexing ions). More than 95% of Cu released into the environment will enter soil and aquatic sediments, where it may accumulate to potentially toxic levels (> 50-500 μg/L). Toxicity of Cu compounds was generally ranked by high throughput assays as: Cu + 2 > nano Cu(0) > nano Cu(OH) 2 > nano CuO > micron-scale Cu compounds. In addition to ROS generation, Cu NPs can damage DNA plasmids and affect embryo hatching enzymes. Toxic effects are observed at much lower concentrations for aquatic organisms, particularly freshwater daphnids and marine amphipods, than for terrestrial organisms. This knowledge will serve to predict environmental risks, assess impacts, and develop approaches to mitigate harm while promoting beneficial uses of Cu NPs.

show abstract

Section: Aquatic Toxicity Studiesmentioning

confidence: 99%

Comparative environmental fate and toxicity of copper nanomaterials

et al. 2017

View full text Add to dashboard Cite

show abstract

“…Ag ENPs test suspensions from ENP Stock I caused immobilization of daphnids within the first 24 hours of exposure, and this immobilization did not increase within 48 hour of exposure. The immobilization of the daphnids increased from 10 % to 90% over a narrow concentration range of 23-45 µg L -1 and the calculated 48-hr EC50 was 32 [28][29][30][31][32][33][34][35][36][37][38] 95% µg L -1 (Table 1). Aging of test concentrations in M7 medium did not significantly affect toxicity, whereas addition of 20 mg L -1 SR-NOM under all conditions completely alleviated the toxicity of Ag ENPs showing no immobilization in any of the concentrations tested.…”

Section: Influence Of Nom and Aging On Acute Toxicity Of Ag Enp Towarmentioning

confidence: 99%

The influence of natural organic matter and aging on suspension stability in guideline toxicity testing of silver, zinc oxide, and titanium dioxide nanoparticles with Daphnia magna

Cupi

Hartmann

Baun

2015

Enviro Toxic and Chemistry

108

View full text Add to dashboard Cite

The present study investigated changes in suspension stability and ecotoxicity of engineered nanoparticles (ENPs) by addition of Suwannee River natural organic matter and aging of stock and test suspensions prior to testing. Acute toxicity tests of silver (Ag), zinc oxide (ZnO), and titanium dioxide (TiO2) ENPs with Daphnia magna were carried out following Organisation for Economic Co‐operation and Development test guidelines. Daphnia magna was found to be very sensitive to Ag ENPs (48‐h 50% effective concentration 33 μg L−1), and aging of the test suspensions in M7 medium (up to 48 h) did not decrease toxicity significantly. Conversely, the presence of Suwannee River natural organic matter (NOM; 20 mg L−1) completely alleviated Ag ENP toxicity in all testing scenarios and did not aid in stabilizing suspensions. In contrast, addition of Suwannee River NOM stabilized ZnO ENP suspensions and did not decrease toxicity. Aging for 48 h generated monotonous concentration–response curves in the presence and absence of Suwannee River NOM. At concentrations up to 100 mg L−1 TiO2 ENPs did not cause immobilization of D. magna under any of the tested conditions. Presence of Suwannee River NOM caused agglomeration in stock suspensions. The authors' results suggest that aging and presence of Suwannee River NOM are important parameters in standard toxicity testing of ENPs, which in some cases may aid in gaining better control over the exposure conditions but in other cases might contribute to agglomeration or elimination of ENP toxicity. Therefore, modifications to the current guidelines for testing ENPs should be evaluated on a case‐by‐case basis. Environ Toxicol Chem 2015;34:497–506. © 2014 SETAC

show abstract

“…Nowadays there is a wide application of nanoparticles in diverse fields including catalysis, energy, chemistry and medicine (Yehia and Al-Sheikh 2014). Nanotechnology approaches to control disease in human and plants have recently been increasing greatly and the unique physicochemical properties of nano-sized metal particles make them successful in biology and medicine (Jo et al 2012). The current understanding of potential risks associated with the release of these materials in the environment for human and animal health is still insufficient (Wang et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Biosynthesis of silver nanoparticles from Aloe vera leaf extract and antifungal activity against Rhizopus sp. and Aspergillus sp.

et al. 2014

View full text Add to dashboard Cite

Silver nanoparticles are receiving increasing attention in the field of agriculture. This study aims at evaluating the antifungal properties of green synthesised silver nanoparticles (AgNPs) from Aloe vera leaf extract against two pathogenic fungus Rhizopus sp. and Aspergillus sp. Results revealed that synthesised nanoparticles showed strong absorption maximum at 400 nm corresponding to the surface plasmon resonance. The prepared nanoparticles were characterized by SEM, FT-IR and UVVis spectroscopy. From the scanning photograph it is clear that particles are heterogeneous in shape such as rectangular, triangular and spherical with uniform distribution. FT-IR study showed sharp absorption peaks at 1,631 and 3,433 cm -1 for amide and alcoholic hydroxide groups, respectively. On the other hand, synthesised silver nanoparticles showed highest antifungal activity against Aspergillus sp. than Rhizopus sp. by application of 100 lL of 1 M silver nanoparticles with maximum inhibition of the growth of fungal hyphae. However, microscopic observation revealed that synthesised nanoparticles caused detrimental effects on conidial germination along with other deformations such as structure of cell membrane and inhibited normal budding process of both the tested species. Therefore, it has been concluded that Aloe vera leaf extract origin silver nanoparticles have tremendous potentiality towards controlling pathogenic fungus. However, further research is needed to check the efficacy of sizedependent AgNPs on different species of fungus.

show abstract

Acute toxicity of Ag and CuO nanoparticle suspensions against Daphnia magna: The importance of their dissolved fraction varying with preparation methods

Cited by 122 publications

References 34 publications

Comparative environmental fate and toxicity of copper nanomaterials

Comparative environmental fate and toxicity of copper nanomaterials

The influence of natural organic matter and aging on suspension stability in guideline toxicity testing of silver, zinc oxide, and titanium dioxide nanoparticles with Daphnia magna

Biosynthesis of silver nanoparticles from Aloe vera leaf extract and antifungal activity against Rhizopus sp. and Aspergillus sp.

Contact Info

Product

Resources

About