Hamad, Alghodran Musab Ahmad (2025) Development Of Magnetic Graphene Oxide-Deep Eutectic Solvent Based Ferrofluids For The Determination Of Selected Organophosphorus Pesticides In Water Samples. PhD thesis, Universiti Sains Malaysia.
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Abstract
The widespread use of OPPs in agriculture has led to their persistence in aquatic environments, posing serious ecological and health concerns. Detecting organophosphorus pesticides (OPPs) at trace levels remains challenging due to matrix interferences and low concentrations, which necessitate the development of rapid, sensitive, and eco-friendly analytical methods. Therefore, this study aimed to develop and characterize MGO-DES FF, optimize its use in LPME, evaluate its adsorption behaviour, and validate its application for real water samples. In this study, a smart ferrofluid (FF) was developed for the extraction of OPPs. The FF was synthesized by incorporating magnetic graphene oxide (MGO) as a magnetic nanocomposite and a deep eutectic solvent (DES) as the carrier medium. The synthesized material was characterized using FTIR, TEM, SEM, XRD, TGA, and VSM. The adsorption performance of methidathion (MET), malathion (MAL), quinalphos (QUI) and diazinon (DIZ) was evaluated through kinetic, isotherm, and thermodynamic models.
| Item Type: | Thesis (PhD) |
|---|---|
| Subjects: | Q Science > QD Chemistry > QD1-999 Chemistry |
| Divisions: | Pusat Pengajian Sains Kimia (School of Chemical Sciences) > Thesis |
| Depositing User: | Mr Aizat Asmawi Abdul Rahim |
| Date Deposited: | 04 Jun 2026 07:01 |
| Last Modified: | 04 Jun 2026 07:01 |
| URI: | http://eprints.usm.my/id/eprint/64291 |
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