Aging reduces the toxicity of pristine but not sulphidised silver nanoparticles to soil bacteria
| Autor: | Joanna Gray, Claus Svendsen, Víctor F. Puntes, Marianne Matzke, Martí Busquets-Fité, Carolin L. Schultz, Elma Lahive, Rudo A. Verweij |
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| Přispěvatelé: | European Commission, Natural Environment Research Council (UK), Schultz, Carolin L., Busquets-Fité, Martí, Puntes, Víctor F., Matzke, Marianne, Schultz, Carolin L. [0000-0003-1578-5114], Busquets-Fité, Martí [0000-0002-7939-5265], Puntes, Víctor F. [0000-0001-8996-9499], Matzke, Marianne [0000-0002-1526-6392], Animal Ecology |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
chemistry.chemical_classification
Soil bacteria Materials Science (miscellaneous) 02 engineering and technology 010501 environmental sciences 021001 nanoscience & nanotechnology 01 natural sciences 6. Clean water Silver nanoparticle Ecology and Environment Bioavailability Metal Pore water pressure chemistry 13. Climate action visual_art Environmental chemistry Toxicity visual_art.visual_art_medium Organic matter 0210 nano-technology Dissolution 0105 earth and related environmental sciences General Environmental Science |
| Zdroj: | Schultz, C L, Gray, J, Verweij, R A, Busquets-Fité, M, Puntes, V, Svendsen, C, Lahive, E & Matzke, M 2018, ' Aging reduces the toxicity of pristine but not sulphidised silver nanoparticles to soil bacteria ', Environmental Science. Nano, vol. 2018, no. 11, pp. 2618-2630 . https://doi.org/10.1039/C8EN00054A Digital.CSIC. Repositorio Institucional del CSIC instname Environmental Science: Nano Environmental Science. Nano, 5(11), 2618-2630. Royal Society of Chemistry |
| ISSN: | 2051-8153 |
| Popis: | In the environment engineered nanoparticles (ENPs) are subject to chemical and physical transformation processes. Thus, to understand their impact, it is important to consider how bioavailability and toxicity are influenced by these “aging” transformations with relation to environmental conditions and ENP properties. Here, two soil bacteria were exposed to Ag ENPs in ISO media (± fulvic acid) and soil pore water extracts with pH 6 and pH 8. The ENPs tested were 49 nm unfunctionalised, citrate stabilised (Ag-citr), 58 nm PVP-coated (Ag-PVP) and 36 nm sulphidised (Ag2S-PVP); AgNO3 was used as a positive control. Exposures were carried out using pristine (unaged) and 24 h aged ENPs, and the 24 h soluble fraction. Overall, toxicity was ranked AgNO3 > Ag-PVP ≥ Ag-citr ≫ Ag2S. Aging of AgNO3, Ag-PVP and Ag-citr in the ISO medium caused little change from unaged exposures and growth inhibition was mainly caused by soluble silver. Added fulvic acid decreased silver toxicity after aging and reduced the contribution of dissolution; as was the case in the soil pore waters where toxicity could not be attributed to ionic silver. Ag2S toxicity to A. globiformis in both ISO variants increased after aging, yet followed the same patterns as the metallic ENPs in the pore waters. For all ENPs pH effects were species dependent. Together this data showed that aging reduced toxicity in media with organic matter and despite soluble silver being the main driver of pristine ENP toxicity in the standard ISO medium, dissolution did not fully explain toxicity in the presence of organic matter. This work was funded by the project GUIDEnano under the 7th Framework Programme of the European Commission (grant agreement no. 6043387), the Natural Environment Research Council Highlight Topic Nanomaterials (grant number: NE/N006224/1), and the project NanoFASE under the EU Horizon 2020 research innovation programme (grant agreement no. 646002). |
| Databáze: | OpenAIRE |
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