Fabrication and characterization of sugarcane bagasse–calcium carbonate composite for the efficient removal of crystal violet dye from wastewater
| Autor: | Deng Ligao, Kai Li, Lu Haiqin, Ruifeng Wang, Wen Li, Xuejing Fan |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science Aqueous solution Process Chemistry and Technology Langmuir adsorption model 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials symbols.namesake chemistry.chemical_compound Calcium carbonate Adsorption chemistry Chemisorption 0103 physical sciences Materials Chemistry Ceramics and Composites symbols Crystal violet Fourier transform infrared spectroscopy 0210 nano-technology Calcium oxide Nuclear chemistry |
| Zdroj: | Ceramics International. 46:27484-27492 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2020.07.237 |
| Popis: | Sugarcane bagasse (SCB) and calcium oxide with ammonium hydrogen carbonate were reacted in an aqueous solution to obtain an SCB-calcium carbonate (SCB–CaCO3) composite adsorbent, which was used to remove crystal violet (CV) from wastewater. The resulting adsorbent was characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray diffraction, and surface-area and pore-size analyses. The removal of CV dye by using the SCB-CaCO3 composite adsorbent was investigated at different pH levels, adsorbent dosages, contact times, initial dye concentrations, and temperatures. The equilibrium adsorption capacity of SCB-CaCO3 for CV at 3.33 mg/mL SCB-CaCO3 dosage, temperature of 313 K, pH 9.0, and initial dye concentration 1000 mg/L was 293.02 mg/g, and the corresponding removal rate reached 97.67%. The adsorption isotherms, kinetics, and thermodynamic parameters were evaluated in detail. Results showed that the adsorption isotherms of CV dye were consistent with the Langmuir model, so the adsorption was a monolayer process. The adsorption mechanism of CV can be described by a pseudo-second-order kinetic model, indicating that dye adsorption onto SCB-CaCO3 was primarily affected by strong chemisorption through electrostatic interactions. Further thermodynamic studies revealed that the CV adsorption onto SCB-CaCO3 was a spontaneous and endothermic reaction. We also demonstrated that the adsorption of dye by SCB-CaCO3 involved intraparticle diffusion and hydrogen-bonding interactions to some extent. Overall, SCB-CaCO3 was found to be an efficient, low-cost, green, and recyclable organic dye-removal material. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect