Immobilisation of phosphonium-based ionic liquid in polysulfone capsules for the removal of phenolic compounds, with an emphasis on 2,4-dichlorophenol, in aqueous solution
| Autor: | Cíntia Soares, Diego Bittencourt Machado, Everton Skoronski, Natan Padoin |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Thermogravimetric analysis
Environmental Engineering Polymers 0208 environmental biotechnology Ionic Liquids Capsules Environmental pollution 02 engineering and technology 010501 environmental sciences Management Monitoring Policy and Law 01 natural sciences chemistry.chemical_compound symbols.namesake Adsorption Spectroscopy Fourier Transform Infrared Sulfones Phosphonium Polysulfone Waste Management and Disposal 0105 earth and related environmental sciences Aqueous solution Langmuir adsorption model General Medicine Hydrogen-Ion Concentration 020801 environmental engineering Kinetics chemistry Ionic liquid symbols Water Pollutants Chemical Chlorophenols Nuclear chemistry |
| Zdroj: | Journal of Environmental Management. 291:112670 |
| ISSN: | 0301-4797 |
| DOI: | 10.1016/j.jenvman.2021.112670 |
| Popis: | Phosphonium-based ionic liquid immobilised in polysulfone capsules were prepared by the phase inversion technique for the adsorption of different phenolic compounds from aqueous solution. Some techniques, including Scanning Electron Microscopy (SEM), surface analysis by Brunauer-Emmett-Teller (BET), Fourier Transform Infrared Spectroscopy (FT-IR) and Thermogravimetric Analysis (TGA), were used to characterize the capsule and indicated that trihexyltetradecylphosphonium decanoate (ionic liquid) was successfully immobilised in polysulfone, the immobilisation was determined to be 63.29%. Adsorption tests showed that the developed capsules have the potential to remove varied phenolic compounds. For compounds 2,4-dichlorophenol (2,4-DCP) the best removal was achieved between pH 3.0 and 9.0. Temperature variation (25–70 °C) and sodium chloride concentration (0–1000 mg⋅L−1) had no significant changes in adsorption, demonstrating the scope for using this adsorbent with real effluents. Adsorption kinetics demonstrated the mechanism occurs in second order, the Weber-Morris model delimited the intraparticle diffusion as the adsorption limiter. The Redlich-Peterson model was the isothermal analysis that best suited the experimental data, with a β value equal to 0.821 approaching the Langmuir model, which obtained a qmax of 404.50 mg⋅g−1. Consequently, these results demonstrate that these capsules have potential application in the treatment of environmental pollution caused by phenolic compounds. |
| Databáze: | OpenAIRE |
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