نوع مقاله : مقاله پژوهشی
نویسندگان
پژوهشکده چرخه سوخت هستهای، پژوهشگاه علوم و فنون هستهای، سازمان انرژی اتمی ایران، صندوق پستی: 8486-11365، تهران- ایران
کلیدواژهها
عنوان مقاله English
نویسندگان English
This study investigates uranium recovery from a chloride medium using a bulk liquid membrane containing the crown ether DB18C6. The effects of pH and chloride concentration in the donor phase, diluent type and carrier concentration in the liquid membrane phase, and the type and concentration of the acceptor phase, along with transport kinetics, were examined. Results indicated that increasing the crown ether concentration in the liquid membrane phase initially enhanced ion transfer. However, beyond a certain point, further increases in crown ether concentration reduced ion transfer due to increased viscosity. While diluents alone could not transfer ions, the type of diluent influenced the transfer process. Optimal uranyl ion transfer was achieved with a donor phase containing 2 M potassium chloride at pH 4. The type and concentration of the mineral acid in the acceptor phase significantly affected the transfer efficiency, with 0.1 M hydrochloric acid facilitating the maximum transfer of uranyl ions. The study of transfer kinetics revealed that the rate-controlling step is the release of uranyl ions from the liquid membrane into the acceptor phase. Under optimal conditions, selective transfer of uranyl ions was achieved in the presence of molybdenum, niobium, titanium, vanadium, and tungsten. The uranium transfer rate from the donor to the receiving phase exceeded 91%.
کلیدواژهها English
5-aminosalicylic acid through bulk liquid membrane. Journal of the Iranian Chemical Society. 2013;10(6):1129-1136.