Free Silver Ion as the Main Cause of Acute and Chronic Toxicity of Silver Nanoparticles to Cladocerans

Sakamoto, Masaki; Ha, Jin Yong; Yoneshima, Shin; Kataoka, Chisato; Tatsuta, Haruki; Kashiwada, Shosaku

doi:10.1007/s00244-014-0091-x

Cited by 46 publications

(43 citation statements)

References 36 publications

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“…In agreement with a number of studies demonstrating Ag NP dissolution-dependent aquatic toxicity (Ivask et al, 2014;Jemec et al, 2016;Lee et al, 2012;Sakamoto et al, 2015), here we show by using the dissolution data from ultrafiltration (Table 4A) which were obtained at lower total Ag concentrations and sensor bacteria (Table 4C), that the Ag þ ions dissolved from Ag NPs did, as a rule, Table 2 Physico-chemical parameters of the studied natural waters, sampled from Lake Greifen and Lake Lucerne on two different dates (indicated under the lake names) and of the used standard media (OECD202 and ADaM for Daphnia magna and ISO7346-3 for Danio rerio embryos). 7.6 ± 0.2 20 ± 2 e n.a.…”

Section: Toxicity To Daphnia Magna E Agsupporting

confidence: 86%

“…textiles (Ag), coatings (Ag and CuO), cosmetics (Ag) and pest control (Ag and CuO) entails elevated release potential into waterbodies (Keller et al, 2013;Nowack et al, 2012). Ag and CuO NPs are the most harmful NPs to freshwater biota (Bondarenko et al, 2013a;Juganson et al, 2015) mainly due to the shed Ag-and Cu-ions (Angel et al, 2013;Heinlaan et al, 2008;Jemec et al, 2016;Newton et al, 2013;Notter et al, 2014;Sakamoto et al, 2015). However, it has been suggested that the environmental hazard of ion-releasing metal NPs cannot be directly extrapolated from that of the free metal ion (Blinova et al, 2013).…”

Section: Introductionmentioning

confidence: 97%

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Natural water as the test medium for Ag and CuO nanoparticle hazard evaluation: An interlaboratory case study

Heinlaan

Muna

Knöbel

et al. 2016

Environmental Pollution

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Section: Toxicity To Daphnia Magna E Agsupporting

confidence: 86%

Section: Introductionmentioning

confidence: 97%

Natural water as the test medium for Ag and CuO nanoparticle hazard evaluation: An interlaboratory case study

Heinlaan

Muna

Knöbel

et al. 2016

Environmental Pollution

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“…It has been reported that Ag + is more toxic than AgNPs for the phytoplankton species in Chlamydomonas reinhardtii and Daphnia magna (McTeer et al ., ). Some studies have suggested that free Ag + released from AgNPs is responsible for the acute and chronic toxicity of AgNPs in aquatic organisms (Boenigk et al ., ; Sakamoto et al ., ). A study by Miao et al .…”

Section: Introductionmentioning

confidence: 97%

Impact of silver nanoparticles on marine diatom Skeletonema costatum

Huang

Cheng

2016

J of Applied Toxicology

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When silver nanoparticles (AgNPs) are used commercially at a large scale, they infiltrate the environment at a rapid pace. However, the impact of large quantities of AgNPs on aquatic ecosystems is still largely unknown. In aquatic ecosystems, the phytoplanktons have a vital ecological function and, therefore, the potential impact of AgNPs on the microalgae community has elicited substantial concern. Therefore, in this study, the impacts of AgNPs on a marine diatom, the Skeletonema costatum, are investigated, with a focus on their photosynthesis and associated mechanisms. Exposure to AgNPs at a concentration of 0.5 mg l À1 significantly induces excess intracellular reactive oxygen species (ROS, 122%) and reduces 28% of their cell viability. More importantly, exposure to AgNPs reduces the algal chlorophyll-a content. Scanning electron microscopy (SEM) was conducted, which revealed that AgNPs obstruct the light absorption of algae because they adhere to their surface. The maximum photochemical efficiency of photosystem II (Fv/Fm) demonstrates that exposure to AgNPs significantly inhibits the conversion of light energy into photosynthetic electron transport. Moreover, the genes of the photosystem II reaction center protein (D1) are significantly down-regulated (P < 0.05) upon exposure to 5 mg l À1 AgNPs. These results suggest that the physical adhesion and effects of shading of AgNPs on algae might affect their light energy delivery system and damage the crucial protein function of PSII. The photosynthesis inhibition effect of AgNPs is largely different from Ag + . This study shows that AgNPs at higher concentrations might have serious consequences for the succession of the phytoplankton communities and aquatic ecosystem equilibrium.

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“…Their widespread use could increase the Ag release in the environment, which may have a negative impact on ecosystems. The recent results of the acute toxicity tests support the theory that the AgNP effects on the aquatic organisms are mainly due to the Ag + release from nanoparticles [14]. Therefore, the Ag release from products into water or wastewater should be controlled.…”

Section: Introductionmentioning

confidence: 73%

Impact of Different Washing Conditions on the Release of Ag Species from Textiles

KomosiAska¹,

Bara²

2016

J Civil Environ Eng

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Free Silver Ion as the Main Cause of Acute and Chronic Toxicity of Silver Nanoparticles to Cladocerans

Cited by 46 publications

References 36 publications

Natural water as the test medium for Ag and CuO nanoparticle hazard evaluation: An interlaboratory case study

Natural water as the test medium for Ag and CuO nanoparticle hazard evaluation: An interlaboratory case study

Impact of silver nanoparticles on marine diatom Skeletonema costatum

Impact of Different Washing Conditions on the Release of Ag Species from Textiles

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