Lasu, Clayrine Shima Anak
(2024)
Performance Evaluation Of A New Magnetic Adsorbent Functionalized With Deep Eutectic Solvents For Tetracycline Antibiotics
Removal From Aqueous
Samples.
Masters thesis, Perpustakaan Hamzah Sendut.
Abstract
The increasing demand for a sustainable industrial processing and analytical application advocates for greener and feasible alternatives to the conventional method of drug removal from contaminated water bodies without instigating further detrimental effect to the environment. Deep eutectic solvents (DESs) had garnered growing attention due to their green properties along with additional benefits such as simple and low cost production. In this research, a relatively new and environmentally benign DES comprised of ethylene glycol (EG) and 1-butylimidazole (ButIm) was selected as modifiers in magnetic iron (II, III) oxide, Fe3O4. The unique properties of Fe3O4@DES were employed to design a rapid, efficient removal of four tetracycline compounds; tetracycline (TC), chlortetracycline (CTC), oxytetracycline (OTC), and doxycycline (DO) from aqueous sample. The synthesized adsorbent will provide a wide range of interactions including hydrogen bonding, π-π bonding, and electrostatic interaction that increases the affinity of adsorbent to tetracycline analytes. In response to an external magnet, the magnetic DES can be drawn out with ease, thus contributing to a time-saving procedure and greener approach by using small amount of sorbent without the excessive use of toxic solvents. The chemical, physical and structural properties of the synthesized adsorbent were assessed via Fourier transform infrared spectroscopy (FTIR), nuclear magnetic resonance spectroscopy (NMR), scanning electron microscopy (SEM), transmission electron microscopy (TEM),
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