Data/hora: 16/06/2024 00:41:44

Biblioteca(s): | Embrapa Meio Ambiente.
Data corrente: | 31/01/2017
Data da última atualização: | 31/01/2017
Autoria: | GONÇALVES, S. P. C.; STRAUSS, M.; DELITE, F. de S.; CLEMENTE, Z.; CASTRO, V. L. S. S. de; MARTINEZ, D. S. T.
Afiliação: | SUELI PATRICIA COSTA GONCALVES, CNPEM; MATHIAS STRAUSS, CNPEM; FABRICIO DE SOUZA DELITE, CNPEM; ZAIRA CLEMENTE, CNPEM; VERA LUCIA SCHERHOLZ S DE CASTRO, CNPMA; DIEGO STEFANI TEODORO MARTINEZ, FCA-UNICAMP.
Título: | Activated carbon from pyrolysed sugarcane bagasse: silver nanoparticle modification and ecotoxicity assessment.
Ano de publicação: | 2016
Fonte/Imprenta: | Science of The Total Environment, v. 565, p. 833?840, 2016.
DOI: | http://dx.doi.org/10.1016/j.scitotenv.2016.03.041
Idioma: | Inglês
Conteúdo: | Activated carbon from pyrolysed sugarcane bagasse (ACPB) presented pore size ranges from 1.0 to 3.5 nm, and surface area between 1200 and 1400 m2 g? 1 that is higher than commonly observed to commercial activated carbon. The ACPB material was successfully loaded with of silver nanoparticles with diameter around 35 nm (0.81 wt.%). X-ray photoelectron spectroscopy (XPS) analyses showed that the material surface contains metallic/Ag0 (93.60 wt.%) and ionic/Ag+ states (6.40 wt.%). The adsorption capacity of organic model molecules (i.e. methylene blue and phenol) was very efficient to ACPB and ACPB loaded with silver nanoparticles (ACPB-AgNP), indicating that the material modification with silver nanoparticles has not altered its adsorption capacity. ACPB-AgNP inhibited bacteria growth (Escherichia coli), it is a promising advantage for the use of these materials in wastewater treatment and water purification processes. However, ACPB-AgNP showed environmental risks, with toxic effect to the aquatic organism Hydra attenuata (i.e. LC50 value of 1.94 mg L? 1), and it suppressed root development of Lycopersicum esculentum plant (tomato). Finally, this work draw attention for the environmental implications of activated carbon materials modified with silver nanoparticles.
Palavras-Chave: | Econanotoxicology; Functionalization; Metallic nanoparticles; Nanomateriais; Porous carbon.
Thesagro: | Bagaço; Cana de açúcar; Carvão; Metal; Toxidez; Tratamento da água.
Thesaurus Nal: | Nanoparticles; Nanosilver.
Categoria do assunto: | X Pesquisa, Tecnologia e Engenharia
Registro original: | Embrapa Meio Ambiente (CNPMA)
Exemplares: | CNPMA - (15244-1) - UPC - AP - DD -  -  -  - DIS