HF-free dry gel synthesis of MIL-100(Fe) for adsorptive removal of salicylic acid in wastewater treatmenture
This study reports an HF-free dry-gel conversion route to synthesise MIL-100(Fe) and evaluate its performance for adsorptive removal of salicylic acid from wastewater. Comprehensive characterisation of the material was conducted using XRD, FT-IR, FESEM and zeta potential. The dry gel conversion meth...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | en |
| Published: |
Universiti Teknologi MARA Shah Alam
2025
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| Subjects: | |
| Online Access: | https://ir.uitm.edu.my/id/eprint/129127/1/129127.pdf https://ir.uitm.edu.my/id/eprint/129127/ https://journal.uitm.edu.my/ojs/index.php/MJCET |
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| Summary: | This study reports an HF-free dry-gel conversion route to synthesise MIL-100(Fe) and evaluate its performance for adsorptive removal of salicylic acid from wastewater. Comprehensive characterisation of the material was conducted using XRD, FT-IR, FESEM and zeta potential. The dry gel conversion method successfully produced MIL-100(Fe) with an amorphous structure with an average particle size of 27 μm. Adsorption experiments achieved a maximum salicylic acid removal efficiency of 82.62% across the tested range (10 to 50 µg/mL), corresponding to an adsorption capacity of 80.93 mg/g at 120 minutes. Significant reductions in FT-IR peaks associated with carboxylic acid O–H stretching vibrations were observed, particularly in regions 3600 to 4000 cm−1 and 2500 to 3600 cm−1 . These changes indicate strong interactions between the carboxyl groups of salicylic acid and the active sites on the MIL-100(Fe) surface, confirming effective adsorption and removal of salicylic acid. These findings demonstrate that MIL-100(Fe) synthesised through a hydrofluoric acid-free dry gel conversion route is an effective and environmentally benign adsorbent for the removal of pharmaceutical pollutants from wastewater. |
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