Journal
BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY
Volume 106, Issue 4, Pages 637-646Publisher
SPRINGER
DOI: 10.1007/s00128-021-03116-8
Keywords
Nanoscale ZnO particles; Ecotoxicology; Microalgae cells; Zn transportation
Categories
Funding
- Fundamental Research Funds for Zhejiang Provincial Universities and Research Institutes [2019J00038]
- General Scientific Project of Zhejiang Education Department [Y201840255]
- Open Foundation of Mine Environmental Pollution Control and Remediation of Hubei Key Laboratory [2018101]
- Open Foundation from Marine Sciences in the First-Class Subjects of Zhejiang Province
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The study found that microalgal cells may act as vehicles for zinc oxide nanoparticles, promoting zinc diffusion and sedimentation, but as of now, there is no accurate method to detect their effects at low concentrations.
The concentration of eco-toxic zinc oxide nanoparticles (nZnO) in aquatic ecosystems is increasing, and an effective method for their removal is needed. We hypothesize that microalgal cells may act as nZnO vehicles-if the nZnO concentration does not affect their swimming ability-enabling Zn diffusion and sedimentation. We conducted experiments using flasks connected via a U-type vessel; the first flask contained nZnO suspensions and second flask contained artificial seawater, respectively. We added microalgae to the first flask and illuminated the second. The microalgae appeared to promote sedimentation. However, only a few microalgal cells passed via phototaxis into the second flask, so the detection of nZnO or Zn ions in the second flask was not possible. Therefore, to confirm whether the microalgae affect Zn transportation, a more accurate method to detect nZnO or Zn ions at very low concentrations is needed.
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