Multiwalled carbon nanotube–polyurethane (MWCNT/PU) composite adsorbent for safranin T and Pb(II) removal from aqueous solution: Batch and fixed-bed studies
| Autor: | Momina Nazir, Ufana Riaz, Tabrez Alam Khan, Equbal A. Khan |
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| Rok vydání: | 2015 |
| Předmět: |
Nanotube
Chromatography Aqueous solution Langmuir adsorption model Condensed Matter Physics Endothermic process Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials chemistry.chemical_compound symbols.namesake Adsorption chemistry Safranin Monolayer Materials Chemistry symbols Physical and Theoretical Chemistry Spectroscopy Nuclear chemistry BET theory |
| Zdroj: | Journal of Molecular Liquids. 212:467-479 |
| ISSN: | 0167-7322 |
| DOI: | 10.1016/j.molliq.2015.09.036 |
| Popis: | Multiwalled carbon nanotube–polyurethane (MWCNT/PU) composite was synthesized and used as a novel adsorbent for safranin T and Pb(II) removal from aqueous solution. The experimental data conformed to Langmuir isotherm suggesting monolayer adsorption of both dye/metal. The adsorbent proved to be highly efficient with high BET surface area (491 m 2 /g) and high monolayer adsorption capacity ( q m ) of 500 mg/g (safranin T) and 270.27 mg/g [Pb(II)]. Column studies gave a breakthrough capacity of 425.25 mg/g (safranin T) and 239.05 mg/g [Pb(II)]. The data followed pseudo-second order kinetics, with both liquid-film and intra-particle diffusion controlling the overall mechanism. The adsorption process was spontaneous and endothermic. The efficiency of the adsorbent for treatment of real wastewater samples under optimized conditions was evaluated. |
| Databáze: | OpenAIRE |
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