Adsorption and removal of triphenylmethane dyes from water by magnetic reduced graphene oxide
| Autor: | Fuxiang Chang, Jianzhong Sun, Xiang-Yang Wu, Gakai Peter Kingori, Rong-Wei Si, Yu Shen, Lu Gao, Xiang Xiao, Zhi-Hong Liao, Yang-Chun Yong |
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| Rok vydání: | 2014 |
| Předmět: |
Langmuir
Environmental Engineering Materials science Inorganic chemistry Oxide Ferric Compounds Waste Disposal Fluid Nanocomposites law.invention symbols.namesake chemistry.chemical_compound Adsorption law Monolayer Crystal violet Coloring Agents Water Science and Technology Triphenylmethane Graphene Langmuir adsorption model Trityl Compounds Kinetics chemistry symbols Graphite Water Pollutants Chemical |
| Zdroj: | Water Science and Technology. 70:1663-1669 |
| ISSN: | 1996-9732 0273-1223 |
| DOI: | 10.2166/wst.2014.427 |
| Popis: | Triphenylmethane (TPM) dye is one of the most prevalent and recalcitrant water contaminants. Magnetic reduced graphene oxide (rGO) is an efficient adsorbent for organic pollutants removal. However, the performance and adsorption kinetics of magnetic rGO towards TPM have not yet been studied. In this study, a magnetic Fe3O4@rGO nano-composite, which could be easily removed from water with a simple magnetic separation step was synthesized and characterized. The magnetic rGO showed fast adsorption rate and high adsorption capacity towards different TPM dyes (the Langmuir monolayer adsorption capacity is 64.93 mg/g for adsorption of crystal violet). The adsorption processes are well-fitted to the pseudo-second-order kinetic model (R2 > 0.99) and the Langmuir isotherm model (R2 = 0.9996). Moreover, the magnetic rGO also showed excellent recycling and regeneration capabilities. The results indicated that adsorption with magnetic rGO would be a promising strategy to clean up the TPM contamination. |
| Databáze: | OpenAIRE |
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