Document Details
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Document Type |
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Thesis |
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Document Title |
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MODIFIED METAL LAYERED DOUBLE HYDROXIDES FOR REMOVAL OF ANTIBIOTICS CONTAMINANTS FROM PHARMACEUTICAL WASTEWATER تحضير متراكبات ذات طبقات مزدوجة من هيدروكسيدات بعض المعادن لإزالة ملوثات مضادات حيوية بمياه الصرف الدوائية |
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Subject |
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Faculty of Meteorology, Environment and Arid Land Agriculture |
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Document Language |
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Arabic |
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Abstract |
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ABSTRACT
In this thesis, metal layered double hydroxides (MLDH) based adsorbents were synthesized for removal of Oxytetracycline (OTC) antibiotics contaminant in pharmaceutical wastewater. A series of binary (CuAl-LDH, MnAl-LDH), ternary (CuMnAl-LDH, NiMgAl-LDH) layered double hydroxide, magnetic nanoparticle (CuFe2O4) and a modified layered double hydroxide composite (CuFe2O4/NiMgAl-LDH composite) having both LDH and magnetic property were synthesized via hydrothermal method. The synthesized materials were characterized by different characterization tools such as X-Ray diffraction (XRD), Transmission electron microscope (TEM), Scanning Electron Microscopy (SEM), X-ray photoelectron spectroscopy (XPS). The synthesized materials were applied for the decontamination of Oxytetracycline antibiotic from pharmaceutical wastewater via batch adsorption technique. Different parameters affecting the adsorption process such as effect of pH, contact time, temperature, concentration, co-existing pollutants were investigated to find out the optimum experimental conditions at which maximum removal occurs.
The results suggested that adsorption of antibiotics on LDH sorbents are generally affected by the pH of the aqueous solution as best adsorption capacity was observed at pH range 4-7. As temperature was increased from 30-50 °C, the removal efficiency of OTC on all the tested LDHs also increased. In addition, the higher the concentration of OTC in solution the higher the adsorption capacity till the maximum capacity was reached at 76 mg/L for CuFe2O4/NiMgAl-LDH composite and 156.89 mg/L for CuMnAl-LDH. The adsorption mechanism of antibiotics on LDHs was mainly governed by strong electrostatic attraction, anionic exchange and hydrogen bonding. Overall, the adsorption capacity for OTC removal by the prepared materials were controlled by the morphology, chemical composition, and chemical structure of the materials. Thus, the ternary (CuMnAl-LDH: 250 mg/g at 50 °C) and modified metal layered double hydroxides (CuFe2O4/NiMgAl-LDH composite: 192 mg/g at 50 °C) showed a very promising removal capacity for OTC in comparison to NiMgAl-LDH – 116 mg/g, CuAl-LDH - 109 mg/g, CuFe2O4 – 106 mg/g, MnAl-LDH – 23.1 mg/g, which can be useful in the treatment and decontamination of other contaminants in pharmaceutical wastewater. |
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Supervisor |
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Prof. Dr. Mohamed Abu El-Fetouh Barakat |
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Thesis Type |
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Master Thesis |
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Publishing Year |
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1441 AH
2020 AD |
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Co-Supervisor |
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Dr. Rajeev Kumar |
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Added Date |
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Wednesday, January 22, 2020 |
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Researchers
| جاميو اولانريواجو اينياولا | ENIOLA, JAMIU | Researcher | Master | |
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