Data/hora: 10/06/2024 01:27:53

Biblioteca(s): 	Embrapa Meio Ambiente.	
Data corrente: 	03/08/2018	
Data da última atualização: 	03/08/2018	
Autoria: 	CASTRO, V. L. S. S. de; CLEMENTE, Z.; JONSSON, C. M.; SILVA, M. S. G. M. e; VALLIM, J. H.; MEDEIROS, A. M. Z. de; MARTINEZ, D. S. T.	
Afiliação: 	VERA LUCIA SCHERHOLZ S DE CASTRO, CNPMA; ZAIRA CLEMENTE, CNPEM; CLAUDIO MARTIN JONSSON, CNPMA; MARIANA SILVEIRA GUERRA MOURA E SILVA, CNPMA; JOSE HENRIQUE VALLIM, CNPMA; ALINE MARIA ZIGIOTTO DE MEDEIROS, CENA-USP; DIEGO STEFANI TEODORO MARTINEZ, CNPEM.	
Título: 	Nanoecotoxicity assessment of graphene oxide and its relationship with humic acid.	
Ano de publicação: 	2018	
Fonte/Imprenta: 	Environmental Toxicology and Chemistry, v. 37, n. 7, p. 1998-2012, 2018.	
DOI: 	https://doi.org/10.1002/etc.4145	
Idioma: 	Inglês	
Conteúdo: 	Abstract: 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-1 for graphene oxide with and without humic acid, respectively. The safest scenario associated with the predicted no-effect concentration values for graphene oxide in the aquatic compartment were estimated as 20 to 100µgL-1 (in the absence of humic acid) and 5 to 23µgL-1 (in the presence of humic acid). Finally, the present approach contributed to the risk assessment of graphene oxide-based nanomaterials and the establishment of nano-regulations. Environ Toxicol Chem 2018;37:1998-2012.	
Palavras-Chave: 	Ecotoxicity; Nanotecnologia; Óxido de grafeno; Predicted no-effect concentration.	
Thesagro: 	Composto de Carbono; Composto Químico; Impacto Ambiental; Meio Ambiente Aquático.	
Thesaurus Nal: 	Ecotoxicology; Graphene oxide; Humic acids; Nanomaterials; Nanotechnology; Risk assessment.	
Categoria do assunto: 	P Recursos Naturais, Ciências Ambientais e da Terra	
Registro original: 	Embrapa Meio Ambiente (CNPMA)	
Exemplares: 	CNPMA - (16163-1) - UPC - AP - DD -  -  -  - DIS