الفهرس Only 14 pages are availabe for public view
 |  | from | 237 |  |  |
| | | from | 237 | | |
Abstract
One of the most common treatment methods for such aqueous streams is the use of ion exchange, which is a well developed technique that has been employed for many years in both the nuclear industry and in other industries.
This thesis is concerned with some fundemental studies related to the separation and preconcentration of some radionucloides, namely, sodium-22, cesium-137, cobalt-60 and europium-152+154. The main aim of this study is direct to prepare silicotitanate samples (SiTi-I, SiTi-II and SiTi-III) and to find the optimum conditions for separation and preconcentration of the aforementioned radionuclides. In this concern, kinetic studies, distribution studies and adsorption isotherm are investigated on silicotitanate samples(SiTi-I, SiTi-II and SiTi-III) to optimize the operative conditions for removal of these radionuclides (Na+, Cs+, Co2+ and Eu3+) from back end of fuel cycle.
The work carried out in this thesis is summarized in to three main parts; namely, introduction, experimental and finally results and discussion.
The first chapter is introduction and literature which includes a brief account on the classification of synthetic ion exchange, silicotitanate as in organic ion exchanger, characterization and Physicochemical Properties of Inorganic Ion Exchanger, Application of ion exchange techniques for the treatment of radioactive liquids .
A literature survey related to different synthetic inorganic ion exchangers and natural materials for separation of certain radionuclides of importance in nuclear technology was reviewed.
The second chapter is materials and methods which includes the chemicals used and their chemical purity, the method of preparation of silicotitanate as well as the instrumentation, the analytical techniques and the procedures used in this thesis.
The third chapter deals with the results and discussion and is divided into main sections namely; preparation and characterization of adsorbent materials, distribution studies, kinetic studies and sorption isotherms in the first section from third chapter is the preparation and characterization , brief account on the preparation of silicotitanate was required and the solubility of the prepared materials was determined from H2O, acidic and basic solution the prepared silico(IV)titanate samples are stable in water and acid solutions up to 5M HNO3 and 5M HCl. While the samples are completely dissolved at 6M acids, silico(IV)titanate are strongly soluble in NaOH and KOH, the solublity increase by increasing the concentration of the base (NaOH and KOH) from 0.1M to 1M . Also the I.R of the prepared materials was determined at different drying temperatures, 50, 200, 400, 600 and 850oC.