Ecotoxicity of zirconium oxide nanoparticles in relation to aquatic invertebrates
Monika Załęska-Radziwiłł , Nina Doskocz
AbstractThe purpose of this study was to investigate the ecotoxicity of zirconium oxide nanoparticles to aquatic invertebrates and to compare the effect of activity of the nanoform with the macroform of this compound. The study was conducted using protozoans Tetrahymena thermophila, and crustaceans Thamnocephalus platyurus and Daphnia magna. Acute tests were performed: immobilization assay with the crustaceans and enzymatic assay with D. magna, as well as chronic tests; Growth assay with the protozoans and reproduction assay with D. magna. Nano-ZrO2 did not cause the immobilization of crustaceans within 48 h (D. magna) and 24 h (Thamnocephalus platyurus)—EC50 > 400 mg/L. However, the compound influenced enzymatic processes of the crustaceans in sublethal concentrations. EC50 in one-hour Fluotox test amounted to 153 mg/L. The largest harmfulness of zirconium oxide nanoparticles was shown in the chronic test with the use of T. thermophila. The value of EC50 after 24 h amounted to 12.83 mg/L and no observed effect concentrations (NOEC) ≤ 0.19 mg/L. The compound also inhibited the reproduction of crustaceans by 50% in the concentration of 96 mg/L, whereas NOEC was 0.78 mg/L. The conducted assays confirmed that the investigated nanocompound was more toxic for crustaceans than its molecular form.
|Journal series||Desalination and Water Treatment, ISSN 1944-3994|
|Publication size in sheets||0.5|
|Keywords in English||Zirconium oxide nanoparticles, Ecotoxicity, Aquatic invertebrates|
|Score|| = 20.0, 28-11-2017, ArticleFromJournal|
= 20.0, 28-11-2017, ArticleFromJournal
|Publication indicators||: 2016 = 1.631 (2) - 2016=1.643 (5)|
|Citation count*||1 (2018-06-14)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.