الفهرس 
CHAPTER IOnly 14 pages are availabe for public view
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Abstract
The purpose of this work was achieved by preparation of the amine impregnated cellulose with cellulose and amine then optimization of the relevant factors affecting both adsorption and elution of U wet phosphoric acid. Secondary and tertiary amines were used to choose the suitable one for the recovery of uranium from phosphoric acid with the least contaminants.
Two types of amine were used such as tri-ethyl amine and Di-ethyl amine to obtain AIC1and AIC2 respectively. The characterization of amine-impregnated cellulose AIC1 and AIC2 have been proved by means of IR and.
Several series of extraction and elution experiments have been performed using a proper synthesized phosphoric acid solution simulating the WPPA (35%P2O5) to optimize the different relevant factors.
The optimum conditions for U extraction from the prepared 35% P2O5phosphoric acid include 1g of synthesizedAIC1 adsorbent, initial uranium concentration of 100 mg/L (400 ml), and 60 min contact time at room temperature.
The maximum loading capacity of uranium upon AIC1 isfound which were found to be satisfactory fitted with Langmuir isotherm; a matter which confirms the favorability of the adsorption process for the uranium using the amine impregnated cellulose.
A maximum-metal uptake of U for AIC1, AIC2 was observed at the obtained optimumconditions. Also, elution process of uranium has been achieved at 1 M of 30 ml Na2CO3 solution 15 min contact time. While elution process of uranium has been achieved at NaCl (2mole) /HCl (1 mole) at room temperaturefor each 1g AIC2 after 30 min contact time.
AIC1 was compared with AIC2 to be an effective selective extractant for uranium from phosphoric acid solutions of comparable concentration to the wet process phosphoric acid (WPPA).
The work then shifted to apply the optimum conditions of U ions adsorption and elution on El- Sebayia phosphate ore. The chemical composition of the El- Sebayia phosphate leach liquor was determined as 35% P2O5and 100 ppm U assay are similar to the working synthetic acid.
Finally, the amine impregnated cellulose was used to recover uranium from phosphoric acid originally obtained from El-Sebayia phosphate ore as a case study. The results obtained are promising and reflect the suitability of AIC for this purpose.