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2. Master Thesis / Tesis Master
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Title:	Preparation of magnetic nanoparticles modified with surfactant sylgard 309 for extraction of phenol from water samples
Authors:	Beh Shiuan Yih (P94555)
Supervisor:	Noorashikin Md Saleh, Dr.
Keywords:	Universiti Kebangsaan Malaysia -- Dissertations Dissertations, Academic -- Malaysia Nanoparticles Phenols
Issue Date:	8-Dec-2020
Description:	The usage of phenols in marketplace has been increasing tremendously, which has raised concerns on their toxicity and potential effect as emerging pollutants. Phenols were classified as a hazardous substance based on previous researches. Hence, a simple and efficient procedure is required to extract low concentration of phenols in environmental water sample. Not only that phenols exist in products, it has also been washed off to the environment indirectly and unknowingly. In this research, a developed method of modifying the surface of magnetic nanoparticles (MNP) with surfactant Sylgard 309 were developed to overcome the drawbacks on the classic extraction methods. In addition, this developed method will improve the performance of extraction when MNP and surfactant Sylgard 309 were used separately as reported in previous research. This MNP-Sylgard 309 were synthesised with coprecipitation method and will attract phenol in environmental water samples. The characterisation of MNP-Sylgard 309 was characterized by Fourier transform infrared spectroscopy, Scanning electron microscopy, x-ray diffractometer, energy dispersive x-ray spectroscopy and vibrating sample magnometer analysis. The obtained results from characterisation of MNP-Sylgard 309 proved that the synthesis of MNP-Sylgard 309 was successfully prepared. The response surface methodology was used to study the parameters and responses in order to obtain an optimised condition using MNP-Sylgard 309. The parameters included the effect of pH, extraction time and concentration of analyte. Meanwhile the responses measured were the dosage, selectivity and reusability. From this study, the results of optimum condition for extraction using MNP-Sylgard 309 was pH 7, extraction time of 20 mins and concentration of analyte of 0.5 μg mL-1. Under the optimized conditions, the MNP-Sylgard 309 showed a low limit of detection of 0.665 μg mL-1 and limit of quantication was between 2.219 μg mL-1. The application of MNP-Sylgard 309 was successfully applied on environmental water samples such as water samples from different locations of lake and river water and a high recovery (76.23% - 110.23%) were obtained.,Master of Science
Pages:	76
Publisher:	UKM, Bangi
Appears in Collections:	Faculty of Engineering and Built Environment / Fakulti Kejuruteraan dan Alam Bina

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