Document Details
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Document Type |
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Thesis |
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Document Title |
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NOVEL ELECTROCHEMICAL SENSORS FOR DETERMINATION OF SELECTED ORGANOHALOGEN DISINFECTION BY –PRODUCTS IN COMPLEX MATRICES USING CHEMICALLY MODIFIED ELECTRODES استحداث مجسات كهروكيميائية مبتكرة لتقدير نواتج المعقمات (المطهرات) العضوية ألمختارة المحتوية على الهالوجين فى ألأوساط المعقدة باستخدام أقطاب محسنة كيميائي |
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Subject |
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Faculty of Sciences |
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Document Language |
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Arabic |
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Abstract |
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The presented work demonstrated the development of electrochemical sensors for the direct determination of some of disinfection byproducts (DBPs) in real water samples. Three different classes of DBPs were selected to study, such as trichloroacetic acid (TCA) which is one of the important regulated DBPs, N-nitrosodiphenylamine (NDPHA) a nitrosamine derivative as one of the emerged DBPs, 4-nitrophenol (4-NP) and 2,4-dinitrophenol (2,4-DNP) which presented anthropogenic DBPs. These pollutants are well known for their stability and bioaccumulation in the environment for a long time. Therefore, they were becoming toxic and extremely carcinogenic to human and successfully detected by electrochemical techniques. Different nanomaterials/nanocomposites were prepared and used to fabricate the electrochemical sensors. The cyclic voltammetry (CV) was used for the electrochemical characterizations, whereas the square wave voltammetry (SWV) was used for quantification of TCA, NDPHA, 4-NP and 2,4-DNP. The electrochemical impedance spectroscopy (EIS) was employed to investigate the electrode/electrolyte interfacial charge transfer resistances, and the sensing elements. Modified electrodes (AgNP-MA/GC, Nafion/GC, ZnO/GC, and Fe3O2/Bi2O3/GC) were characterized for their surface morphology and functional groups by field emission scanning electron microscopy (FESEM) and Fourier transform infrared spectroscopy (FTIR). The fabricated electrochemical sensors were successfully applied for the interferences and recovery studies. They provide promising, simple, low-cost, fast and sensitive electroanalytical detection for TCA, NDPHA,2-NP and 2,4-DNP. |
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Supervisor |
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Prof. Mohammad S. El-Shahawi |
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Thesis Type |
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Doctorate Thesis |
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Publishing Year |
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1439 AH
2018 AD |
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Co-Supervisor |
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Prof. Iqbal Mohammed Ismail |
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Added Date |
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Thursday, June 7, 2018 |
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Researchers
| رانية محمد باشامي | Bashami, Ranyah Mohammed | Researcher | Doctorate | |
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