dc.contributor.author |
El Asmar, Rime Nazih |
dc.date.accessioned |
2021-09-23T08:56:50Z |
dc.date.available |
2021-07 |
dc.date.available |
2021-09-23T08:56:50Z |
dc.date.issued |
2019 |
dc.date.submitted |
2019 |
dc.identifier.other |
b25587973 |
dc.identifier.uri |
http://hdl.handle.net/10938/23103 |
dc.description |
Thesis. M.S. American University of Beirut. Department of Chemistry, 2019. T:7072. |
dc.description |
Advisor : Dr. Antoine Ghauch, Associate Professor, Chemistry ; Members of Committee : Dr. Tarek Ghaddar, Professor, Chemistry ; Dr. Digambara Patra, Associate Professor, Chemistry. |
dc.description |
Includes bibliographical references. |
dc.description.abstract |
The thesis work is divided into two parts: In the first section, MIL-88-A, an iron based MOF (Fe³⁺-Fumaric acid), was synthesized in aqueous medium without the use of an organic solvent, then characterized and tested as a heterogeneous persulfate activator for the elimination of naproxen. A solution containing naproxen simulating the waste water effluent of a production facility was placed in continuously stirred reactors and spiked with MIL-88-A-sodium persulfate mix. The system was optimized in terms of MIL-88-A and persulfate dosages where 65-70percent degradation of [Naproxen]₀ = 50 mg L⁻¹ occurred in a period of two hours in conditions of [MIL-88-A]₀ = 25 mg L⁻¹ and [PS]₀ = 5 mM spiked at t = 60 min. MIL-88-A was proved to be recyclable for at least 4 cycles and the introduction of UV-A irradiation to the system enhanced degradation to reach complete removal of naproxen within two hours reaction time . The effect of various factors on the system was studied. Chlorides and phosphates had no effect on the activation-degradation process. On the other hand, bicarbonates exhibited a strong inhibition effect and degradation process was optimal at acidic conditions (pH = 4). The system was also tested against another oxidant, H₂O₂, and the results showed that PS has higher efficiency in naproxen degradation. In the second section, for the sake of comparing MIL-88-A-PS and MIL-88-A-H₂O₂ systems, [H₂O₂] quantification method was developed by simple modifications to an HPLC-DAD setup. The modifications included the use of acidified potassium iodide solution as a mobile phase and a series of capillary columns instead of the reverse phase column usually used. The method’s LDR ranged from 0.01-150 nm with LOD and LOQ 8.29 × 10⁻⁴ mM and 2.76 × 10⁻³ mM respectively. The method was proven to be cost effective where the cost per analysis ranged between 0.8 and 1.8 USD cents depending on the concent |
dc.format.extent |
1 online resource (viii, 96 leaves) : illustrations (some color) |
dc.language.iso |
en |
dc.subject.classification |
T:007072 |
dc.subject.lcsh |
Persulfates. |
dc.subject.lcsh |
Chemistry, Analytic. |
dc.subject.lcsh |
Contamination (Technology) |
dc.subject.lcsh |
Hydrogen peroxide -- Oxidation. |
dc.title |
The study of a novel PS-based degradation system : MIL-88-A as a heterogeneous activator, application on naproxen and comparison with H₂O₂ using a newly developed analytical technique - |
dc.title.alternative |
MIL-88-A as a heterogeneous activator, application on naproxen and comparison with H₂O₂ using a newly developed analytical technique |
dc.type |
Thesis |
dc.contributor.department |
Department of Chemistry |
dc.contributor.faculty |
Faculty of Arts and Sciences |
dc.contributor.institution |
American University of Beirut |