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Nanoecotoxicity Assessment of Graphene Oxide and Its Relationship with Humic Acid by Vera L. Castro; Zaira Clemente; Claudio Jonsson; Mariana Silva; José Henrique Vallim; Aline Maria Zigiotto de Medeiros; Diego Stéfani T. Martinez is a Environmental Science article available to read on EtoBox.

What is Nanoecotoxicity Assessment of Graphene Oxide and Its Relationship with Humic Acid about?

The risk assessment of nanomaterials is essential for regulatory purposes and for sustainable nanotechnological development. Although the application of graphene oxide has been widely exploited, its environmental risk is not well understood because several environmental conditions can affect its behavior and toxicity. In the present study, the graphene oxide effect from aquatic ecosystems was assessed considering the interaction with humic acid on 9 organisms: Raphidocelis subcapitata (green algae), Lemna minor (aquatic plant), Lactuca sativa (lettuce), Daphnia magna (planktonic microcrustacean), Artemia salina (brine shrimp), Chironomus sancticaroli (Chironomidae), Hydra attenuata (freshwater polyp), and Caenorhabditis elegans and Panagrolaimus sp. (nematodes). The no-observed-effect concentration (NOEC) was calculated for each organism. The different criteria used to calculate NOEC values were transformed and plotted as a log-logistic function. The hypothetical 5 to 50% hazardous concentration values were, respectively, 0.023 (0.005-0.056) and 0.10 (0.031-0.31) mg L for graphene oxide with and without humic acid, respectively. The safest scenario associated with the predicted no-

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Author

Vera L. Castro; Zaira Clemente; Claudio Jonsson; Mariana Silva; José Henrique Vallim; Aline Maria Zigiotto de Medeiros; Diego Stéfani T. Martinez

Published

2018

Language

EN

Field

Environmental Science (Physical Sciences)