Uptake of nickel-63 onto silicon antimonate composites

The performance of various silicon antimonate composites having a wide rang e of Si/Sb molar ratio i.e., 0.18 to 2.72, synthesized earlier((1)) were as sessed by some ion exchange batch experiments for the removal of carrier fr ee (CF) Nickel-63 radioisotope. The kinetic studies and distribution coeffi cients (K-d) for various composites showed that the removal of Ni-63 in the same chemical environment was proportional to the quantity of antimony pre sent in the composites. In each case the selectivity sequence for the uptak e of Ni-63 radioisotope was in agreement with the stoichiometry amount of a ntimony present in the composites.