Speaker
Dr
Moumita Maiti
(Saha Institute of Nuclear Physics)
Description
The mandate of green chemistry is to search newer methods, benign to the environment and Earth, in every sphere of chemical applications. The nuclear and radioanalytical chemistry is no way exception from this mandate. In this paper we present the development of a benign method for separation of 97Ru, a potential candidate radionuclide in the field of nuclear medicine from 12C induced Y target by aqueous biphasic extraction system (ABS). Unlike liquid liquid extraction ABS does not use environmentally harmful organic solvents and therefore considered as a benign approach in the field of separation sciences.
In this paper we report the production of 97Ru by bombardment of 70 MeV 12C projectiles (with an average beam current of 90 nA) for 3 hours on a Y target. Two reaction channels, (i) natY(12C, 4n)97Rh(EC) 97Ru (ii) natY(12C, p3n)97Ru, contributed in the production of 97Ru. Assuring the production of 97Ru in the target matrix by $\gamma$-spectrometric studies, we dissolved the target in 0.1 M HCl, evaporated to dryness and finally redissolved in 0.01 M HCl. Four salts Na2SO4, Na2SO3, Na2CO3 (2 M each), NaOH (4 M) were used in combination with 50% PEG (Polyethylene glycol) in order to form various ABS. It has been found that ~ 60% extraction of 97Ru was possible in the PEG phase without contamination of bulk yttrium when 2 M Na2SO4 was used as salt rich phase. A high separation factor of 840 was achieved. The developed method is simple, fast and environment friendly.
Author
Dr
Moumita Maiti
(Saha Institute of Nuclear Physics)
Co-author
Prof.
Susanta Lahiri
(Saha Institute of Nuclear Physics)
