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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Makama, Sunday Piella, Jordi Undas, Anna Dimmers, Wim J. Peters, Ruud Puntes, Victor F. Van Den Brink, Nico W. |
| Description | Author Affiliation: Makama S ( Division of Toxicology, Wageningen University and Research Centre, Tuinlaan 5, 6703 HE, Wageningen, The Netherlands); Piella J ( Institut Català de Nanociència i Nanotecnologia (ICN2), Campus de la Universitat Autònoma de Barcelona (Campus UAB), 08193, Bellaterra, Barcelona, Spain.); Undas A ( RIKILT- Inst. of Food Safety, Wageningen University and Research Centre, Akkermaalsbos 2, 6708 WB, Wageningen, The Netherlands.); Dimmers WJ ( Alterra, Wageningen University and Research Centre, Droevendaalsesteeg 3, 6708 PB, Wageningen, The Netherlands.); Peters R ( RIKILT- Inst. of Food Safety, Wageningen University and Research Centre, Akkermaalsbos 2, 6708 WB, Wageningen, The Netherlands.); Puntes VF ( Institut Català de Nanociència i Nanotecnologia (ICN2), Campus de la Universitat Autònoma de Barcelona (Campus UAB), 08193, Bellaterra, Barcelona, Spain); van den Brink NW ( Division of Toxicology, Wageningen University and Research Centre, Tuinlaan 5, 6703 HE, Wageningen, The Netherlands. Electronic address: nico.vandenbrink@wur.nl.) |
| Abstract | Physicochemical properties of nanoparticles influence their environmental fate and toxicity, and studies investigating this are vital for a holistic approach towards a comprehensive and adequate environmental risk assessment. In this study, we investigated the effects of size, surface coating (charge) of silver nanoparticles (AgNPs) - a most commonly-used nanoparticle-type, on the bioaccumulation in, and toxicity (survival, growth, cocoon production) to the earthworm Lumbricus rubellus. AgNPs were synthesized in three sizes: 20, 35 and 50 nm. Surface-coating with bovine serum albumin (AgNP_BSA), chitosan (AgNP_Chit), or polyvinylpyrrolidone (AgNP_PVP) produced negative, positive and neutral particles respectively. In a 28-day sub-chronic reproduction toxicity test, earthworms were exposed to these AgNPs in soil (0-250 mg Ag/kg soil DW). Earthworms were also exposed to AgNO at concentrations below known EC . Total Ag tissue concentration indicated uptake by earthworms was generally highest for the AgNP_BSA especially at the lower exposure concentration ranges, and seems to reach a plateau level between 50 and 100 mg Ag/kg soil DW. Reproduction was impaired at high concentrations of all AgNPs tested, with AgNP_BSA particles being the most toxic. The EC for the 20 nm AgNP_BSA was 66.8 mg Ag/kg soil, with exposure to <60 mg Ag/kg soil already showing a decrease in the cocoon production. Thus, based on reproductive toxicity, the particles ranked: AgNP_BSA (negative) > AgNP_PVP (neutral) > Chitosan (positive). Size had an influence on uptake and toxicity of the AgNP_PVP, but not for AgNP_BSA nor AgNP_Chit. This study provides essential information on the role of physicochemical properties of AgNPs in influencing uptake by a terrestrial organism L. rubellus under environmentally relevant conditions. It also provides evidence of the influence of surface coating (charge) and the limited effect of size in the range of 20-50 nm, in driving uptake and toxicity of the AgNPs tested. |
| File Format | HTM / HTML |
| ISSN | 02697491 |
| Journal | Environmental Pollution |
| Volume Number | 218 |
| e-ISSN | 18736424 |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2016-11-01 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | One Nation One Subscription (ONOS) |
| Content Type | Text |
| Resource Type | Article |
| Subject | Health, Toxicology and Mutagenesis Pollution Medicine Toxicology |
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