Abdul Rahman, Aida Syafiqah and Fizal, Ahmad Noor Syimir and Khalil, Nor Afifah and Ahmad Yahaya, Ahmad Naim and Md. Sohrab, Hossain and Zulkifli, Muzafar (2023) Fabrication and characterization of magnetic cellulose–chitosan–alginate composite hydrogel bead bio-sorbent. Polymers, 15 (2494). pp. 1-14. ISSN 2073-4360. (Published)
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Abstract
The implementation of inorganic adsorbents for the removal of heavy metals from industrial effluents generates secondary waste. Therefore, scientists and environmentalists are looking for environmentally friendly adsorbents isolated from biobased materials for the efficient removal of heavy metals from industrial effluents. This study aimed to fabricate and characterize an environmentally friendly composite bio-sorbent as an initiative toward greener environmental remediation technology. The properties of cellulose, chitosan, magnetite, and alginate were exploited to fabricate a composite hydrogel bead. The cross linking and encapsulation of cellulose, chitosan, alginate, and magnetite in hydrogel beads were successfully conducted through a facile method without any chemicals used during the synthesis. Energy-dispersive X-ray analysis verified the presence of element signals of N, Ca, and Fe on the surface of the composite bio-sorbents. The appearance and peak’s shifting at 3330–3060 cm−1 in the Fourier transform infrared spectroscopy analysis of the composite cellulose–magnetite–alginate, chitosan–magnetite–alginate, and cellulose–chitosan–magnetite–alginate suggested that there are overlaps of O-H and N-H and weak interaction of hydrogen bonding with the Fe3O4 particles. Material degradation, % mass loss, and thermal stability of the material and synthesized composite hydrogel beads were determined through thermogravimetric analysis. The onset temperature of the composite cellulose–magnetite–alginate, chitosan–magnetite–alginate, and cellulose–chitosan–magnetite–alginate hydrogel beads were observed to be lower compared to raw-material cellulose and chitosan, which could be due to the formation of weak hydrogen bonding resulting from the addition of magnetite Fe3O4. The higher mass residual of cellulose–magnetite–alginate (33.46%), chitosan–magnetite–alginate (37.09%), and cellulose–chitosan–magnetite–alginate (34.40%) compared to cellulose (10.94%) and chitosan (30.82%) after degradation at a temperature of 700 °C shows that the synthesized composite hydrogel beads possess better thermal stability, owing to the addition of magnetite and the encapsulation in the alginate hydrogel beads.
| Item Type: | Article |
|---|---|
| Additional Information: | Indexed by Scopus |
| Uncontrolled Keywords: | Adsorption; Alginate; Bio-sorbent; Cellulose; Chitosan; Hydrogel beads; Magnetite; Morphology |
| Subjects: | Q Science > QD Chemistry T Technology > T Technology (General) T Technology > TP Chemical technology |
| Faculty/Division: | Centre for Sustainability of Ecosystem & Earth Resources (Earth Centre) |
| Depositing User: | Mr Muhamad Firdaus Janih@Jaini |
| Date Deposited: | 08 Sep 2023 06:35 |
| Last Modified: | 08 Sep 2023 06:35 |
| URI: | http://umpir.ump.edu.my/id/eprint/38348 |
| Download Statistic: | View Download Statistics |
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