Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.22/7244
Título: Characterization of green zero-valent iron nanoparticles produced with tree leaf extracts
Autor: Machado, S.
Pacheco, J.G.
Nouws, H.P.A.
Albergaria, José Tomás
Delerue-Matos, C.
Palavras-chave: Zero-valent iron nanoparticles
Green synthesis method
Tree leaves
Size
Reactivity
Agglomeration
Data: Nov-2015
Editora: Elsevier
Relatório da Série N.º: Science of The Total Environment;Vol. 533
Resumo: In the last decades nanotechnology has become increasingly important because it offers indisputable advantages to almost every area of expertise, including environmental remediation. In this area the synthesis of highly reactive nanomaterials (e.g. zero-valent iron nanoparticles, nZVI) is gaining the attention of the scientific community, service providers and other stakeholders. The synthesis of nZVI by the recently developed green bottom-up method is extremely promising. However, the lack of information about the characteristics of the synthetized particles hinders a wider and more extensive application. This work aims to evaluate the characteristics of nZVI synthesized through the green method using leaves from different trees. Considering the requirements of a product for environmental remediation the following characteristics were studied: size, shape, reactivity and agglomeration tendency. The mulberry and pomegranate leaf extracts produced the smallest nZVIs (5–10 nm), the peach, pear and vine leaf extracts produced the most reactive nZVIs while the ones produced with passion fruit, medlar and cherry extracts did not settle at high nZVI concentrations (931 and 266 ppm). Considering all tests, the nZVIs obtained from medlar and vine leaf extracts are the ones that could present better performances in the environmental remediation. The information gathered in this paper will be useful to choose the most appropriate leaf extracts and operational conditions for the application of the green nZVIs in environmental remediation.
URI: http://hdl.handle.net/10400.22/7244
DOI: 10.1016/j.scitotenv.2015.06.091
Versão do Editor: http://www.sciencedirect.com/science/article/pii/S0048969715302862
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