Assessing the ecotoxicity of metal nano-oxides with potential for wastewater treatment

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• 作者：V. Nogueira ; I. Lopes ; T. A. P. Rocha-Santos…
• 关键词：Ecotoxicity ; Aquatic organisms ; Nanomaterials ; Sublethal and lethal effects ; Wastewater treatment
• 刊名：Environmental Science and Pollution Research
• 出版年：2015
• 出版时间：September 2015
• 年：2015
• 卷：22
• 期：17
• 页码：13212-13224
• 全文大小：468 KB
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• 作者单位：V. Nogueira (1) (2)
  I. Lopes (1) (2)
  T. A. P. Rocha-Santos (1) (3)
  M. G. Rasteiro (4)
  N. Abrantes (1) (5)
  F. Gon?alves (1) (2)
  A. M. V. M. Soares (1) (2)
  A. C. Duarte (1) (3)
  R. Pereira (6) (7)
  
  1. CESAM (Centre for Environmental and Marine Studies), University of Aveiro, Campus de Santiago, 3810-193, Aveiro, Portugal
  2. Department of Biology, University of Aveiro, Campus Universitário de Santiago, 3810-193, Aveiro, Portugal
  3. Department of Chemistry, University of Aveiro, Campus Universitário de Santiago, 3810-193, Aveiro, Portugal
  4. CIEPQPF - Department of Chemical Engineering, Faculty of Science and Technology, Polo II, University of Coimbra, 3030-290, Coimbra, Portugal
  5. Department of Environment and Planning, University of Aveiro, Campus Universitário de Santiago, 3810-193, Aveiro, Portugal
  6. Department of Biology, Faculty of Science, University of Porto, Rua do Campo Alegre, 4169-007, Porto, Portugal
  7. Research (CIIMAR/CIMAR), University of Porto, Rua dos Bragas 289, 4050-123, Porto, Portugal
  
• 刊物类别：Earth and Environmental Science
• 刊物主题：Environment
  Environment
  Atmospheric Protection, Air Quality Control and Air Pollution
  Waste Water Technology, Water Pollution Control, Water Management and Aquatic Pollution
  Industrial Pollution Prevention
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1614-7499

文摘

The rapid development of nanotechnology and the increasing use of nanomaterials (NMs) raise concern about their fate and potential effects in the environment, especially for those that could be used for remediation purposes and that will be intentionally released to the environment. Despite the remarkable emerging literature addressing the biological effects of NMs to aquatic organisms, the existing information is still scarce and contradictory. Therefore, aimed at selecting NMs for the treatment of organic and inorganic effluents, we assessed the potential toxicity of NiO (100 and 10-0 nm), Fe₂O₃ (?5?×-25 nm), and TiO₂ (<25 nm), to a battery of aquatic organisms: Vibrio fischeri, Raphidocelis subcapitata, Lemna minor, Daphnia magna, Brachionus plicatilis, and Artemia salina. Also a mutagenic test was performed with two Salmonella typhimurium strains. Suspensions of each NM, prepared with the different test media, were characterized by dynamic light scattering (DLS) and eletrophoretic light scattering (ELS). For the assays with marine species, no toxicity was observed for all the compounds. In opposite, statistically significant effects were produced on all freshwater species, being D. magna the most sensitive organism. Based on the results of this study, the tested NMs can be classified in a decreasing order of toxicity NiO (100 nm) > NiO (10-0 nm) > TiO₂ (<25 nm) > Fe₂O₃, allowing to infer that apparently Fe₂O₃ NMs seems to be the one with less risks for receiving aquatic systems. Keywords Ecotoxicity Aquatic organisms Nanomaterials Sublethal and lethal effects Wastewater treatment