Low-Cost Synthesis of Alumina Nanoparticles and Their Usage for Bisphenol-A Removal from Aqueous Solutions
| Autor: | Issaka Garikoe, Corneille Bakouan, Boubié Guel, Ollé Rodrigue Kam |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Aqueous solution
endocrine disrupting chemical Chemistry Process Chemistry and Technology surfactant Chemical technology Nanoparticle Langmuir adsorption model Infrared spectroscopy Bioengineering TP1-1185 N-cetyl-N N N trimethylammonium bromide symbols.namesake chemistry.chemical_compound Adsorption Pulmonary surfactant Bromide gamma-alumina nanoparticles symbols Chemical Engineering (miscellaneous) Fourier transform infrared spectroscopy QD1-999 Nuclear chemistry |
| Zdroj: | Processes, Vol 9, Iss 1709, p 1709 (2021) Processes Volume 9 Issue 10 |
| ISSN: | 2227-9717 |
| Popis: | Gamma-alumina nanoparticles (γANPs) were obtained from a low-cost process by using natural bauxites. The γANPs materials were characterized by X-ray powder diffraction (XRPD), Fourier-transform infrared spectroscopy (FTIR), Brunauer–Emmett–Teller (BET) theory, scanning electron microscopy (SEM), atomic force microscopy (AFM), and were functionalized with N-cetyl-N, N, N, trimethylammonium bromide (CTAB), leading to CTAB modified γ-alumina nanoparticles (γANPs-CTAB). These novel functionalized γANPs-CTAB were characterized by XRPD, FTIR, and were used as an adsorbent for bisphenol-A (BPA) removal from water. Batch investigations were conducted under different experimental conditions (e.g., adsorbent dose, agitation time, initial concentration, and pH and surfactant loading) in order to optimize BPA adsorption and to identify the adsorption mechanisms in the system γANPs-CTAB-BPA. The effect of pH on the adsorption showed that the quantity of BPA removed increased remarkably until the pH value was 4, then remained almost constant until the pH value was up to 10, and then decreased for pH values greater than 10. For an initial BPA concentration of 20 mg/L and an adsorbent dose of 12.5 g/L at a pH value of 10, the removal efficiency achieved was 91.80 ± 0.21%. The adsorption mechanism was perfectly described by pseudo-second-order kinetics and the Langmuir isotherm. γANPs-CTAB materials were found to be effective adsorbents for BPA removal from water. |
| Databáze: | OpenAIRE |
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