Scalable fabrication of chitosan-grafted silica bionanocomposite for the superb sequestration of anionic dye from aqueous solution
| Autor: | H. N. M. Ekramul Mahmud, Priya Saharan, Siti Nurul Azian Zakaria, Jose H. Santos, Vinit Kumar, Ashok K. Sharma, Norhabibah Binti Mohamad |
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| Rok vydání: | 2020 |
| Předmět: |
Aqueous solution
Nanocomposite Materials science Renewable Energy Sustainability and the Environment Scanning electron microscope Infrared spectroscopy Langmuir adsorption model Biomaterials Chitosan chemistry.chemical_compound symbols.namesake Adsorption chemistry Chemical engineering Transmission electron microscopy Ceramics and Composites symbols Waste Management and Disposal |
| Zdroj: | Emergent Materials. 3:871-879 |
| ISSN: | 2522-574X 2522-5731 |
| DOI: | 10.1007/s42247-020-00129-7 |
| Popis: | The aim of the current research is to fabricate chitosan-grafted silica (Chit/SiO2) bionanocomposite for the easy sequestration of anionic dye (Food Green 3) from aqueous solution. The as-prepared nanocomposite material was characterized using powder X-ray diffraction, Fourier-transform infrared spectroscopy, scanning electron microscopy and transmission electron microscopy. The adsorption characteristics of Chit/SiO2 nanocomposite were systematically studied as a function of pH, adsorbent dose and initial concentration with respect to contact time. The results revealed that an amount of 0.01 g of Chit/SiO2 showed maximum removal efficacy of the adsorbed dye (30 mg/L) at pH 3. Adsorption equilibrium verified that the experimental statics fitted well with the Langmuir isotherm model with adsorption capacity of 476.19 mg/L. The rate kinetics is well described by pseudo-second-order adsorption model. Moreover, Chit/SiO2 nanocomposite could be successfully regenerated and reused without any major loss in adsorption efficacy. |
| Databáze: | OpenAIRE |
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