Effects of Carbon Quantum Dots on Aquatic Environments: Comparison of Toxicity to Organisms at Different Trophic Levels
Carbon Quantum Dots
Carbon fibers
Chemical toxicity
DOI:
10.1021/acs.est.8b04235
Publication Date:
2018-11-29T01:09:21Z
AUTHORS (8)
ABSTRACT
Carbon quantum dots (CQDs) have high hydrophilicity, cell permeability, and are frequently used in water-based biorelated applications, yet studies concerning the ecological risks of CQDs aquatic environments largely insufficient. In present study, toxicity to zebrafish (Danio rerio), zooplankton (Daphnia magna), phytoplankton (Scenedesmus obliquus) were assessed for first time. The results indicated that (up 200 mg/L) could be depurated by D. rerio with negligible toxicity. comparison, induced mortality immobility magna a 48-h EC50 value LC50 97.5 160.3 mg/L, respectively. S. obliquus, inhibited photosynthesis nutrition absorption dose- time-dependent manner, growth algae was also 96-h 74.8 suggesting lowest trophic level this most sensitive exposure. Further investigations revealed an increase oxidative stress cells decrease pH medium, indicating water acidification may mechanisms underlying obliquus.
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