This study investigates the adsorption of gallium-67, routinely used in nuclear medicine laboratories, in aqueous solution by using the waste of a rose-oil processing factory (rose residue). The experimental parameters were determined to be as follows: temperature, (10.0 to 40.0) degrees C; pH, (2.0 to 10.0); stirring speed, (300 to 720) rpm; particles size, (0.15 to 1.40) mm; and adsorbent dose, (1.0 to 15.0) g.L(-1). It was seen that the most important parameters were pH, temperature, particle size, and adsorbent dose. The adsorption mechanism of the rose residue was examined by comparing the Fourier transform infrared (FUR) spectra before and after adsorption. The Delta G and Delta H values were determined, and it was concluded that the absorption was endothermic and spontaneous. Absorption kinetics was studied, and it was observed that they fit a pseudo second-order model. As a result, it was found that the rose residue was a perfect absorbent for the adsorption of gallium-67.