Document Details
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Document Type |
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Thesis |
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Document Title |
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NANOMATERIALS FOR ENVIRONMENTAL REMEDIATION: KINETIC AND THERMODYNAMIC STUDY استخدام المواد النانونية في المعالجة البيئية : دراسة الديناميكا الحركية والحرارية |
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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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Environmental pollution is a world-wide problem that threatens the lives of all living organisms. Reactive dyes are one of the organic compounds that mostly pollute water. Dyes are discharged into the environment by textile, paper and printing industries. Waste water effluent containing mainly high levels of dye cause tremendous damage to the aquatic environment and subsequently to plants, animals, and humans.Researchers and scientists have dedicated a lot of time and effort seeking effective, reusable and cheap techniques for wastewater treatment.
In this thesis, different zero valent metal nanoparticles were synthesized, zinc nanoparticles (ZnNPs), copper nanoparticles (CuNPs), and bimetallic nanoparticles, zinc nanoparticles coated with copper (CuZnNPs), and copper nanoparticles coated with zinc (ZnCuNPs), via reduction route using sodium borohydride, and used for the removal of Acid Red dye (AR dye); as an example or organic dyes, from aqueous solution. The prepared nanoparticles were characterized using different characterization techniques; SEM-EDX, TEM, XRD, and surface area analysis, to explore their morphology, chemical, and physical properties, and the results showed the presence of the nanoparticles, and their chemical composition was identified. The effect of different experimental conditions may affect the removal process was explored, and the results showed that most of the AR dye could be removed from solution within few minutes, at ambient temperature using most 80 mg ZnNPs, 30 mg of CuNPs, and 30 mg of CuZnNPs. The results showed that coating ZNPs with Cu significantly enhanced their removal efficacy. The removal of the AR dye using ZnNPs, CuNPs, and CuZnNPswas studied kinetically and thermodynamically, and the results showed that the experimental data were best fitted using the pseudo-second-order kinetic model with excellent correlation coefficients. The thermodynamics study of the removal process showed the spontaneity of the process. The mechanism of the removal process was studied, and the results showed that the removal process occurred via reductive catalytic degradation of the AR dye molecules by the NPs. Finally, the preparedZnNPs, CuNPs, and CuZnNPs were used for the removal of AR dye in real wastewater sample contains AR dye, and the results showed the high removal efficiency. |
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Supervisor |
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Dr. Mohamed Abdel Salam |
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Thesis Type |
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Master Thesis |
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Publishing Year |
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1438 AH
2017 AD |
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Co-Supervisor |
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Dr. Samia Kosa |
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Added Date |
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Thursday, June 8, 2017 |
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Researchers
| نوف علي النهدي | Al-Nahdi, Nouf Ali | Researcher | Master | |
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