Can the surface modification and/or morphology affect the ecotoxicity of zinc oxide nanomaterials?
| Autor: | Denice Schulz Vicentini, Bianca Vicente Oscar, Renata Gonçalves, Silvia Pedroso Melegari, Cristiane Funghetto Fuzinatto, William Gerson Matias |
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| Rok vydání: | 2019 |
| Předmět: |
Environmental Engineering
Surface Properties Health Toxicology and Mutagenesis 0208 environmental biotechnology Daphnia magna chemistry.chemical_element Nanoparticle 02 engineering and technology Zinc 010501 environmental sciences Ecotoxicology 01 natural sciences Nanomaterials Toxicity Tests Animals Environmental Chemistry 0105 earth and related environmental sciences Nanotubes biology Chemistry Public Health Environmental and Occupational Health General Medicine General Chemistry biology.organism_classification Pollution Acute toxicity Nanostructures 020801 environmental engineering Daphnia Chemical engineering Nanoparticles Surface modification Nanorod Zinc Oxide Ecotoxicity |
| Zdroj: | Chemosphere. 224:237-246 |
| ISSN: | 0045-6535 |
| DOI: | 10.1016/j.chemosphere.2019.02.093 |
| Popis: | Among nanomaterials, zinc oxide (ZnO) is notable for its excellent biocidal properties. In particular, it can be incorporated in mortars to prevent biofouling. However, the morphology of these nanomaterials (NMs) and their impact on the action against biofouling are still unknown. This study aimed to assess how the morphology and surface modification can affect the ecotoxicology of ZnO NMs. The morphologies evaluated were nanoparticles (NPs) and nanorods (NRs), and the ZnO NMs were tested pure and with surface modification through amine functionalization (@AF). The toxic effects of these NMs were evaluated by acute and chronic ecotoxicity tests with the well-established model microcrustacean Daphnia magna. The ZnO NMs were characterized by transmission electron microscopy, X-ray diffraction and infrared spectroscopy. The EC5048h to D. magna indicated higher acute toxicity of ZnO@AF NRs compared to all tested NMs. Regarding the chronic test with D. magna, high toxic effects on reproduction and longevity were observed with ZnO@AF NRs and effects on growth were observed with ZnO NRs. In general, all tested ZnO NMs presented high toxicity when compared to the positive control, and the NRs presented higher toxicity than NPs in all tested parameters, regardless of the form tested (pure or with surface modification). Additionally, the pathways of ecotoxicity of the tested ZnO NMs was found to be related to combined factors of Zn ion release, effective diameter of particles and NM internalization in the organism. |
| Databáze: | OpenAIRE |
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