Effect of sulfidation and dissolved organic matters on toxicity of silver nanoparticles in sediment dwelling organism, Chironomus riparius

Lee, Si-Won; Park, Sunyoung; Kim, Younghun; Im, Hosub; Choi, Jinhee

doi:10.1016/j.scitotenv.2016.02.064

Cited by 38 publications

(18 citation statements)

References 50 publications

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“…AgNPs' toxicity can accumulate in several organs, thereby causing toxicity, in part via oxidative stress including pulmonary and germ cell toxicity, embryo toxicity, and cell death. [2][3][4][5][6][7][8][9] Nanoparticle-induced oxidative stress is hypothesized to be the main mechanism regulating the biological effects of these nanoparticles. 10,11 Toxicity of AgNPs could also be due to release of Ag ions in the system or extensive systemic distribution of Ag in tissues causing oxidative stress, protein or DNA damage, and apoptotic cell death.…”

Section: Introductionmentioning

confidence: 99%

Antioxidant and hepatoprotective role of selenium against silver nanoparticles

Ansar

Alshehri

Abudawood

et al. 2017

IJN

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Silver nanoparticles (AgNPs) have attracted the most interest in terms of their potential biomedical and industrial applications. However, these nanoparticles have shown their toxic behavior toward environment, living tissues, and organisms. Selenium (Se), an essential trace element, is necessary for various metabolic processes, including protection against oxidative stress and immune function. The present study was undertaken to evaluate the effect of Se against AgNP-induced hepatic oxidative stress. AgNPs were synthesized and then prepared nanoparticles were characterized using various analytical techniques such as UV-visible spectroscopy, X-ray diffraction, and transmission electron microscopy. Rats were administered AgNPs intraperitoneally (5 mg/kg/day) and Se (0.2 mg/kg) was given by gavage. AgNP administration induced hepatic damage as indicated by the serum marker enzymes with reduction in levels of glutathione, and decrease in activities of SOD, CAT, and GSH-peroxidase ( P <0.05). Decrease in levels of total antioxidant capacity (TAC) and increase in level of C-reactive protein (CRP) was also observed in AgNP-treated group compared to control group. However, Se markedly attenuated AgNP-induced biochemical alterations, levels of TAC, CRP, and serum transaminases (AST, ALT) ( P <0.05). Taken together, these findings suggest that administration of AgNPs produces hepatotoxicity in rats, whereas Se supplementation attenuates these effects.

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Section: Introductionmentioning

confidence: 99%

Antioxidant and hepatoprotective role of selenium against silver nanoparticles

Ansar

Alshehri

Abudawood

et al. 2017

IJN

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“…Increasing sulfur concentration forms Ag 2 S nanobridges between the coated AgNPs creating chain-like structures; the larger aggregate particle size and altered surface charge reduce the dissolution rate 21 . Given that both sulfidation and NOM have been shown to influence stability and toxicity of AgNPs, recent attention has focused increasingly on the competitive interaction between the two, with studies conducted on uncapped 22 , PVP-capped 23 and citrate-and Tween-capped AgNPs 24 . Whilst it was shown that the sulfidation in itself reduced the apparent toxicity of the AgNPs 22 In this study we examine these interactions by observing the stability and temporal changes in size distributions of citrate-and PVP-capped AgNPs in the presence or absence of sulfide and NOM whilst under sub-oxic conditions at environmentally realistic concentrations.…”

Section: Introductionmentioning

confidence: 99%

Role of Humic Acid in the Stability of Ag Nanoparticles in Suboxic Conditions

Milne

Lapworth

Gooddy

et al. 2017

Environ. Sci. Technol.

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Stability and temporal changes in size distributions have been observed for citrate- (cit) and polyvinylpyrrolidone- (PVP) capped silver nanoparticles (AgNPs), in the presence or absence of sulfide and natural organic matter (NOM, as humic acid), while under suboxic conditions. There were substantial differences in the influence of the two capping agents, with PVP-AgNPs showing few or no significant changes in apparent stability or particle size distribution under the conditions examined, while the apparent size distributions of citrate-capped AgNPs changed rapidly. Sulfide and humic acid each individually caused immediate increases in cit-AgNP size distributions, which were then relatively stable over 60-145 days. This may be due to sulfide bridging and cation bridging, respectively. However, in competition, it was the influence of the humic acid that dominated that of the sulfide. These observations have implications for environmental fate and toxicity of AgNP. The increased stability in the presence of even low concentrations of NOM may limit the rapidity of Ag dispersal but may also concentrate the dose received by organisms, which subsequently ingest the stabilized particles.

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“…C. sancticaroli culture was maintained according to OECD (2004OECD ( , 2011. The organisms were maintained at 23-26 °C in a 16/8 light/dark cycle with daily feeding After seven days of separation from the reproducers (approximately 2 nd instar larvae) (Lee et al 2016;Waissi et al 2017), organisms were selected to the acute and subchronic tests based on.…”

Section: Risk Assessment Measures From the Ssd Modelmentioning

confidence: 99%

Nanosilver toxicity thresholds estimative for aquatic and sediment environmental safety

Vl¹,

Jonsson²,

Msgm³

et al. 2021

Preprint

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Silver nanoparticles (AgNPs) have been largely utilized. Despite that, comprehensive studies on their ecotoxicological effects and environmental risk are still required. In the present study, the AgNPs effect was assessed to some organisms including algae, plants, microcrustaceans, cnidaria, nematodes, aquatic insect, earthworm, and fish embryos. The no-observed-effect concentration (NOEC) was calculated for each organism using a log-logistic function. AgNPs remained stable in contact with culture media during the analyzed period and conditions employed, presenting dispersion less than 20%, except for Artemia salina medium. On this occasion, NPs presented dispersion of approximately 25%, although their size remained unchangeable. The Predicted No Effect Concentration (PNEC) of AgNPs in the aquatic compartment was estimated in the concentration range from 0.13 to 0.66 µg L-1. A Risk Quotient (RQ) of 15.1 was derived for the NP tested with the aid of a maximum AgNPs Predicted Environmental Concentration (PEC) estimated value. The RQ value superior to one indicates a risk and the need for its management measures implementation. These data, in addition to the expected increase in AgNPs use, reinforce the importance of the AgNPs safety levels establishment that can contribute to performing their risk assessment studies.

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Effect of sulfidation and dissolved organic matters on toxicity of silver nanoparticles in sediment dwelling organism, Chironomus riparius

Cited by 38 publications

References 50 publications

Antioxidant and hepatoprotective role of selenium against silver nanoparticles

Antioxidant and hepatoprotective role of selenium against silver nanoparticles

Role of Humic Acid in the Stability of Ag Nanoparticles in Suboxic Conditions

Nanosilver toxicity thresholds estimative for aquatic and sediment environmental safety

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