MoO4
2- ions were sorbed in calcined hydrotalcite contained in a column. It was found that 98% of 99mTc
formed by 99Mo decay was eluted through the column in the form of pertechnetate. The content of
radionuclides was determined by γ-spectrometry, and natural molybdenum was measured by neutron
activation analysis. Solids were characterized by thermal analysis, X-ray diffraction, and infrared
spectroscopy. Through batch experiments, the hydrotalcite capacity toward molybdate ions (1.12 × 10-3
M) was found to be 3.2 mequiv g-1. It was found that the high molybdate adsorbing capacity of calcined
hydrotalcite could be utilized in designing a 99mTc generator made with low specific activity 99Mo-molybdate
samples.