نوع مقاله : مقاله پژوهشی
نویسندگان
1 پژوهشکده چرخه سوخت هستهای، پژوهشگاه علوم و فنون هستهای، سازمان انرژی اتمی ایران، صندوق پستی: 8486-11365، تهران- ایران
2 پژوهشکده مهندسی شیمی، نفت و گاز، دانشگاه علم و صنعت ایران، صندوق پستی 16846، تهران- ایران
3 سازمان انرژی اتمی ایران، صندوق پستی 8486-11365، تهران- ایران
4 شرکت سوخت راکتورهای هستهای، سازمان انرژی اتمی ایران، صندوق پستی: 1957-81465، اصفهان ـ ایران
کلیدواژهها
عنوان مقاله English
نویسندگان English
In the current research work, the alkaline precipitation method was used for the primary separation and purification of uranium in the solution obtained from the dissolution of the evaporation pool scrap (C36) of the uranium processing plant. In this method, the effect of various parameters such as pH, temperature, stirring speed, aging time, and seeding on the uranium precipitation yielded sodium diuranate. In addition, the amount of impurities such as sodium and fluoride in the precipitate was evaluated. The results show that by raising the pH of the solution to 14, the separation yield increases to 98.1%. Nonetheless, using the seeding method, the pH value is reduced to 12 and the separation efficiency increases to 99 %. Also, the results show that increasing the aging time and stirring speed improves the separation percentage. It decreases the amount of sodium and fluoride impurities in the precipitation. In contrast, reducing the temperature leads to an increase in uranium and impurities separation percentage. In general, by applying the seeding process, pH adjustment up to 12, aging time of 12 hours, temperature of 50°C and stirring speed of 250 rpm, the best conditions for primary uranium separation as sodium diuranate with the minimum amount of major impurities in the precipitation were obtained.
کلیدواژهها English