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http://hdl.handle.net/1843/50649| Tipo: | Artigo de Periódico |
| Título: | Polyurethane foam impregnated with lignin as a filler for the removal of crude oil from contaminated water |
| Autor(es): | Olívia de Souza Heleno Santos Mercês Coelho da Silva Virginia Ribeiro da Silva Wagner da Nova Mussel Maria Irene Yoshida |
| Resumen: | The present study describes the influence of the concentration of lignin when used as a filler in polyurethane foam for crude oil sorption. The foams (lignin 0–20 wt%) were characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), thermogravimetric analysis, contact angle and density. The FTIR analysis confirmed urethane linkage formation, showing that the chemical structure of the polymer was preserved, despite the addition of different lignin concentrations. Thermogravimetric analysis showed that the presence of lignin has altered the onset temperature (Tonset) of the foams, decreasing as the concentration of lignin is increased. The contact angle analysis showed a decrease in the hydrophobicity of the foams with increasing lignin concentration. All modified foams showed an improvement in the oil sorption capacity in a PUF/oil/water system, and the PUF-10 showed an improvement of about 35.5% compared to the PUF-blank. The Langmuir isotherm showed a better fit to the data and predicted a maximum oil adsorption of 28.9 gg− ¹ by the PUF-10. The ΔG° value of −4.4 kJ mol−¹ indicated that crude oil adsorption process by PUF-10 was spontaneous. The results of reuse of the PUF-10 showed that oil removal efficiency remained greater than 95% after five consecutive cycles. |
| Asunto: | Química ambiental Físico-química Petróleo - Absorção e adsorção Lignina Poliuretanas Fourier, Espectroscopia de infravermelho por transformada de Microscopia eletronica de varredura Termogravimetria Água - Poluição Derramamento de óleo |
| Idioma: | eng |
| País: | Brasil |
| Editor: | Universidade Federal de Minas Gerais |
| Sigla da Institución: | UFMG |
| Departamento: | ICX - DEPARTAMENTO DE QUÍMICA |
| Tipo de acceso: | Acesso Restrito |
| Identificador DOI: | https://doi.org/10.1016/j.jhazmat.2016.11.004 |
| URI: | http://hdl.handle.net/1843/50649 |
| Fecha del documento: | feb-2017 |
| metadata.dc.url.externa: | https://www.sciencedirect.com/science/article/pii/S030438941631007X |
| Aparece en las colecciones: | Artigo de Periódico |
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