الفهرس 
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Abstract
In our present industrialized society we live in an environment charg with multitude of potentially toxic agents. Man’s activities have increased the level of pollutants in the environment, particularly in water, of ten through inadequate disposal of industrial wastes. But industries are not the only source of pollution, in fact the utilization of chemicals such as pesticides, fertilizers, fuel for transportation, aerosol sprays, detergents…etc. are additional sources. In addition heavy contamination is of growing concern because of the numerous health risks to animals and humans. Since most of the heavy metal laden effluent will ultimately reach sewerage systems via direct discharge or urban runoff, it is important to remove heavy metals during wastewater treatment processes to reduce the potential harmful effects to ecosystems and public health. The investigation of photochemical processes by utilizing semiconductor nanoparticles as a catalyst has become an exciting and rapidly growing area of research during the last few yearsIn photo-oxidation of organic and inorganic contaminant by using TiO2is of great interest. TiO2 is a well-known photocatalyst. The capability of TiO2-based photocatalyst to degrade a wide range of aqueous pollutants makes it a promising candidate for water treatment. The process depends upon the absorption of light in the range ≈ 310-390 nm. When UV light illuminates TiO2 electron and hole pairs generate in it, and they reducing and oxidizing absorbents on the surface respectively, producing radicals such as OH‾ and O‾² radicals. These radicals can decompose most of organic compoundsActivated charcoal is most often used to remove taste and odor contaminants, some metals contaminants as well as to decolorize solutions of offcolor organic materials. Activated charcoal is also effective at removing organic compounds such as volatile organic compounds, pesticides and herbicides from drinking water and is used extensively for this purpose. It is adsorbs over 60,000 toxic chemical pollutants, which we have in our environment, get into our bodies hrough the Air, Water and Food and are accumulative. It is also effective in removing chlorine and removing heavy metals. Activated carbons with their large surface area, microporous character and chemical nature of their surface have made them potential adsorbents for he removal of heavy metals from industrial wastewater. Activated charcoal can absorb 100 to 200 times its own weight. The physical and chemical characteristics of the solute and solvent will also affect performance of activated charcoal. Metallic nanoparticles are nterdicting to increase the rate of photodegradation. The increasing may be depends on the ability of the nanoparticles to adhere the contaminants by electrostatic attraction. In addition the presence of the plasmon band of the metal may increase the absorption intensity and enhance the photocatalytic efficiency. This thesis comprised four chapters The first chapter contains an introduction to the common pollutants of water and the traditional methods used in the water purification. It also contains some of the uses of Titanium dioxide nanoparticles (TiO2) and ts important role in the photodegradation of organic pollutants from water and the role of charcoal in the absorbance of heavy metals. Finally his chapter contains a literature survey on the photodegradation of organic pollutants from water in the last 10 years The second chapter contains the experimental procedures such as materials, instrumentation and the methods used in this research he third chapter contains the results and discussion of the photodegradation of two pollutants as a model (Crystal violet and sodium flouresceine) under sun light on TiO2 and gold na bound a polymer thin films. In the previous system o ntroduced to increase the degradation rate via singlet oxygen The same procedures were rebated under solar simulator esults were nearly the same except that the rate under sun higher than that for solar simulator. Chapter three also c esults and discussion of the adsorption of four heavy metals bound polymer thin films. The last chapter, chapter four contains the references.