Degradation of Methylene Blue and Organic Compounds in Olive Mill Wastewater by Photocatalysis of N-Doped Tio2 Nanoparticles Under Visibile Light

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Sapienza Università di Roma
Faculty of Engineering Chemical Engineering Department

Diploma Project Degradation of Methylene Blue and Organic Compounds in Olive Mill Wastewater by Photocatalysis of N-Doped TiO2 Nanoparticles Under Visibile Light

Prepared By : Mehmet USTUNDAS

Supervisor : Prof. Angelo Chianese

Rome-Italy June-2012

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ABSTRACT
In this study, glass spheres coated by TiO2 nanoparticles and N-Doped TiO2 nanoparticles for photocatalytic applications on the treatment of methylene blue and olive oil waste water. Synthesis of TiO2 and N-Doped TiO2 nanoparticles performed by sol-gel method. The effects of residence time, number of coating, initial concentration of waste water and initial volume of waste water have been invastegated. Increasing number of coating resulted in a increasing percentage of degradation. The effects of the depth of the solution in the reactor and the amount of waste water have been invastigated. The effect of the amount of wastewater was important but on the other hand we couldn’t observe a significant changes on the percentage of degradation caused by the depth of the solution in the reactor.

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LIST OF TABLES
Table 1. Chemicals used in study ..................................................................................................... 7 Table 2. Results of Non-Doped Particles with MBS.......................................................................... 15 Table 3. Results of Non-Doped Particles with MBS after washing............................................. 16 Table 4.Results of Non-Doped Glass Spheres ............................................................................... 20 Table 5. Results of Doped Glass Spheres ....................................................................................... 20 Table 6. The Results of Doped and Non-Dope Glass Spheres with Different Parameters ........ 22 Table 7. Reaction Constants of MBS .............................................................................................. 28 Table 8. Reaction Constants of OMW ............................................................................................ 29

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LIST OF FIGURES
Figure 1. Before Centrifruge and After Centrifruge........................................................................ 7 Figure 3. Doped TiO2 Sol-Gel (Sol. B) .............................................................................................. 8 Figure 2. (a) While the hydrogen peroxide was adding, (b) Sol-Gel ............................................. 8 Figure 4. (a) Dip Coater (b) Pure Glass Spheres in the Dip Coater (c) The Filled Dip Coater by Sol. A .................................................................................................................................................. 9 Figure 5. Furnace for Max. 200 oC.................................................................................................... 9 Figure 6. Furnace 1000 oC .............................................................................................................. 10 Figure 7. The Filled Dip Coater by Sol. B ....................................................................................... 10 Figure 8. Glass Spheres (a)Pure, (b)Undoped and Uncalcinated, (c)Doped and Calcinated .... 11 Figure 9. Dr. Lange COD Measurement Device ............................................................................. 11 Figure 10. Prepared Dr. Lange COD Kits. ..................................................................................... 12 Figure 11. The waste water, (a) Before flocculation, (b) After flocculation. .............................. 13 Figure 12. The images of the setup................................................................................................ 13 Figure 13.COD Kits (a) Before adding waste water, (b) After adding waste water................... 14 Figure 14. Time vs Concentration with Non-Doped Particles and MBS...
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