Status : Verified
| Personal Name | Saporsantos, Nathaniel M. |
|---|---|
| Resource Title | Development of Chitosan – MIL-101 (Fe) – Polyethyleneimine Composite Beads for Methyl Orange Adsorption from Water |
| Date Issued | 06 November 2024 |
| Abstract | This study aims to develop composite beads composed of chitosan (CS), MIL-101 (Fe), and polyethyleneimine (PEI), crosslinked in glutaraldehyde (GLA), for the removal of a common textile dye methyl orange (MO) from water via batch adsorption. Using Response Surface Methodology, CS-MIL-101 (Fe)-PEI beads were synthesized and optimized based on a fitted second order polynomial that described the relationship between percent MO Removal and independent variables defining the synthesis conditions, namely: concentration of MIL-101 (Fe), PEI, and GLA. The obtained model predicted a maximum percent MO removal of 95.75% obtained with beads consisting of 500 ppm MIL-101 (Fe), 1.44% PEI, and 2% CS, crosslinked in 2.11% GLA. With a coefficient of determination (R2) of 0.9944, the model’s predicting capability was validated by determining the experimental percent MO removal of the optimized beads which was found to be 96.20%. Characterization using Fourier Transform Infrared (FTIR) Spectroscopy and Scanning Electron Microscope (SEM) imaging indicated that the synthesized CS-MIL-101 (Fe)-PEI beads possessed a rough surface and a porous structure abundant in functional groups. The effects of various parameters such as pH and initial dye concentration on adsorption capacity were also determined. Results showed that the beads exhibit a percent MO removal of at least 93% across a wide pH range. Kinetic modelling was performed and a pseudo-second order equation with an R2 of 0.981 was obtained, suggesting that chemisorption limits the rate of the reaction. Meanwhile, because of bead surface saturation, increasing initial dye concentration decreases percent MO removal. Furthermore, adsorption equilibrium data of MO were best described by the Sips isotherm model, with a maximum adsorption capacity of 1253.44 mg/g. Finally, regeneration studies showed that the beads have a high regenerative ability, being able to maintain a percent dye removal of ov |
| Degree Course | MS Chemical Engineering |
| Language | English |
| Keyword | Metal-Organic Frameworks; MIL-101 (Fe); Chitosan; Polyethyleneimine; Polymer Composite; Methyl Orange; Adsorption |
| Material Type | Thesis/Dissertation |
Preliminary Pages
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Category : F - Regular work, i.e., it has no patentable invention or creation, the author does not wish for personal publication, there is no confidential information.
Access Permission : Open Access