Toxicity comparison of silver nanoparticles synthesized by physical and chemical methods to tadpole (Rana ridibunda (original) (raw)
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International Journal of Bio-resource and Stress Management, 2018
The effects of silver nanoparticles (Ag-NPs) on the growth, metamorphosis, innate immune parameters and enzyme profiles of tadpole, Polypedates maculatus were studied. Chronic exposure to Ag-NPs for 60 days at 1 mg l-1 and 5 mg l-1 concentrations caused 10% and 50% mortalities respectively alongwith slow growth and delayed metamorphosis as compared to 0.1 mg l-1 treatment and control (0 mg l-1). The non-specific immune parameters and certain enzyme activities like alkaline phosphatase (ALP), superoxide dismutase (SOD) and lactate dehydrogenase (LDH) varied significantly in a dose dependent manner. The accumulation of silver in the tadpole tissues of treated groups ranged from 0.0966±0.0025 µg g-1 to 0.4718±0.0126 µg g-1 as compared to tissues in control group (0.0758±0.0019 µg g-1). Hence Ag-NPs had significant detrimental effects on growth and other associated physiological parameters of tadpole, Polypedates maculatus when administered at higher concentrations (>1 mg l-1) for longer durations. Thus the toxicity studies of Ag-NPs have to be conducted on wider ranges of target and non-target species to assess their environmental impacts. Furthermore, these results suggest that silver nanoparticles induce a dose-dependent toxicity in physiological parameters of tadpoles, which hinders normal development.This study was aimed to enhance our insight on the health and environmental impact of silver nanoparticles. This study pointed out the adverse effects of Ag-NPs in tadpole species and all applications involving silver nanoparticles should be given special attention and promoted only after detailed studies.
2021
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Toxicity of silver nanoparticles in fish: a critical review
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Toxicological effects of silver nanoparticles
Environmental Toxicology and Pharmacology, 2015
The effects of silver nanoparticles (Ag-NPs) on the growth, metamorphosis, innate immune parameters and enzyme profiles of tadpole, Polypedates maculatus were studied. Chronic exposure to Ag-NPs for 60 days at 1 mg l-1 and 5 mg l-1 concentrations caused 10% and 50% mortalities respectively alongwith slow growth and delayed metamorphosis as compared to 0.1 mg l-1 treatment and control (0 mg l-1). The non-specific immune parameters and certain enzyme activities like alkaline phosphatase (ALP), superoxide dismutase (SOD) and lactate dehydrogenase (LDH) varied significantly in a dose dependent manner. The accumulation of silver in the tadpole tissues of treated groups ranged from 0.0966±0.0025 µg g-1 to 0.4718±0.0126 µg g-1 as compared to tissues in control group (0.0758±0.0019 µg g-1). Hence Ag-NPs had significant detrimental effects on growth and other associated physiological parameters of tadpole, Polypedates maculatus when administered at higher concentrations (>1 mg l-1) for longer durations. Thus the toxicity studies of Ag-NPs have to be conducted on wider ranges of target and non-target species to assess their environmental impacts. Furthermore, these results suggest that silver nanoparticles induce a dose-dependent toxicity in physiological parameters of tadpoles, which hinders normal development.This study was aimed to enhance our insight on the health and environmental impact of silver nanoparticles. This study pointed out the adverse effects of Ag-NPs in tadpole species and all applications involving silver nanoparticles should be given special attention and promoted only after detailed studies.
BackgroundCurrently, nanotechnology and nanoparticles have been quickly emerged and have gained the attention of scientists due to its massive applications in environmental sectors. However, these environmental applications of silver nanoparticles potentially cause serious effects on terrestrial and aquatic organisms. In the current study, freshwater fish C. carpio were exposed to blood mediated AgNPs for toxicity, mortality, bioaccumulation, and histological alterations. Silver nanoparticles were fabricated using animal blood serum and their toxic effect was studied against common carp fish at different concentrations level (0.03, 0.06, and 0.09 mg/L).ResultsThe findings have revealed a little effect of blood induced silver nanoparticles (B-AgNPs) on fish behavior at the highest concentration (0.09 mg/L). However, bioaccumulation of B-AgNPs was reported in different organs of fish. Maximum bioaccumulation of B-AgNPs was reported in the liver, followed by intestine, gills, and muscl...
Environmental Sciences Europe
Background Currently, nanotechnology and nanoparticles have quickly emerged and have gained the attention of scientists due to their massive applications in environmental sectors. However, these environmental applications of silver nanoparticles potentially cause serious effects on terrestrial and aquatic organisms. In the current study, freshwater fish C. carpio were exposed to blood-mediated silver nanoparticles for toxicity, mortality, bioaccumulation, and histological alterations. Silver nanoparticles were fabricated using animal blood serum and their toxic effect was studied against common carp fish at different concentrations levels (0.03, 0.06, and 0.09 mg/L). Results The findings have revealed a little influence of blood-induced silver nanoparticles on fish behavior at the highest concentration (0.09 mg/L). However, bioaccumulation of blood-mediated silver nanoparticles was reported in different organs of fish. Maximum bioaccumulation of silver nanoparticles was reported in ...
ECOPERSIA, 2013
In order to understand the importance of particle size and agglomeration for nano-eco-toxicological studies in aquatic environments, the acute toxicity of two different types (suspended powder and colloidal) of silver nanoparticles (AgNPs) were studied in alevin and juvenile rainbow trout. Fish were exposed to each type of AgNPs at nominal concentrations of 0.032, 0.1, 0.32, 1, 3.2, 10, 32, and 100 mg/L. Lethal concentrations (LC) were calculated using a Probit analysis. Some physical and chemical characteristics of silver nanoparticles were determined. In the case of colloidal form, particles were well dispersed in the water column and retained their size; but in the case of suspended powder, particles were agglomerated to large clumps and precipitated on the bottom. In alevins, the calculated 96 h LC50 values were 0.25 and 28.25mg/L for colloidal and suspended powder AgNPs respectively. In the case of juveniles, the 96h LC50 of colloidal form was 2.16mg/L, but suspended powder did not caused mortality in fish even after 21 days. The results showed that both in alevin and juvenile stages, colloidal form is much toxic than suspended powder; this shows increase of nanoparticles size due to agglomeration, will reduce the toxicity. Silver nanoparticles are toxic materials and their release into the water environment should be avoided.
Environmental Science and Pollution Research, 2012
Although silver nanoparticles (NPs) are increasingly used in various consumer products and produced in industrial scale, information on harmful effects of nanosilver to environmentally relevant organisms is still scarce. This paper studies the adverse effects of silver NPs to two aquatic crustaceans, Daphnia magna and Thamnocephalus platyurus. For that, silver NPs were synthesized where Ag is covalently attached to poly(vinylpyrrolidone) (PVP). In parallel, the toxicity of collargol (protein-coated nanosilver) and AgNO 3 was analyzed. Both types of silver NPs were highly toxic to both crustaceans: the EC50 values in artificial freshwater were 15-17 ppb for D. magna and 20-27 ppb for T. platyurus. The natural water (five different waters with dissolved organic carbon from 5 to 35 mg C/L were studied) mitigated the toxic effect of studied silver compounds up to 8-fold compared with artificial freshwater. The toxicity of silver NPs in all test media was up to 10-fold lower than that of soluble silver salt, AgNO 3. The pattern of the toxic response of both crustacean species to the silver compounds was almost similar in artificial freshwater and in natural waters. The chronic 21-day toxicity of silver NPs to D. magna in natural water was at the part-per-billion level, and adult mortality was more sensitive toxicity test endpoint than the reproduction (the number of offspring per adult).