Populus tremula, Nerium oleander and Pergularia tomentosa seed fibers as sources of cellulose and lignin for the bio-sorption of methylene blue
| Autor: | Mahjoub Jabli, Yassine El Ghoul, Adel Ghith, Fahad M. Alminderej, Nouha Sebeia |
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| Rok vydání: | 2019 |
| Předmět: |
Thermogravimetric analysis
02 engineering and technology Lignin Biochemistry 03 medical and health sciences chemistry.chemical_compound Adsorption Structural Biology Freundlich equation Nerium Cellulose Molecular Biology 030304 developmental biology 0303 health sciences Temperature Biosorption Sorption General Medicine 021001 nanoscience & nanotechnology Methylene Blue Kinetics Populus chemistry Seeds 0210 nano-technology Methylene blue Nuclear chemistry |
| Zdroj: | International Journal of Biological Macromolecules. 121:655-665 |
| ISSN: | 0141-8130 |
| DOI: | 10.1016/j.ijbiomac.2018.10.070 |
| Popis: | Cellulose-based substrates could represent potential funds for the sorption of pollutants. Herein, methylene blue was selected for demonstrating the bio-sorption efficiency of Nerium oleander, Pergularia tomentosa and Populus tremula seed fibers. Their cellulose contents were 45%, 43.8% and 60%. Their lignin amounts were 21%, 8.6% and 12%, respectively. Fourier Transform InfraRed suggested that the interaction of these bio-products with methylene blue could occur between hydroxyl and ester groups of cellulose and lignin and the sulfur and nitrogen atoms of the dye. Scanning Electron Microscopy showed a swelling of the bio-matters after dye biosorption. From X-Ray Diffraction, the shifting for higher values of the peaks related to the amorphous phase indicated the establishment of new rearranged regions. Such change from the decomposition behavior event studied by Thermogravimetric Analysis/Differential Thermal Analysis revealed that methylene blue was interacted with cellulose and lignin structures. The effect of adsorbent dosage, pH, time, dye concentration and temperature was investigated in controlled batch experiments. Excellent sorption capacities followed the order: Nerium oleander (280.2 mg g−1) > Populus tremula (168 mg g−1) > Pergularia tomentosa (145.3 mg g−1). Freundlich fitted best the equilibrium data suggesting cooperative interactions via physisorption and chemisorption phenomenon. Kinetic data complied well with the pseudo-second-order suggesting a chemisorption mechanism. |
| Databáze: | OpenAIRE |
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