In the paper the eliminating strontium ions from groundwater by using the CAN-7 activated carbon under dynamic conditions has been studied. The activated carbon CAN-7 is obtained by the chemical method, through the treatment with orthophosphoric acid at distinct temperatures. It has been proved that by the reduction of the filtration rate of the solution containing strontium ions through the adsorbent column, the strontium ion adsorption is increased. The adsorption of strontium ions from aqueous solutions on the CAN-7 activated carbon has been measured at different lengths of working layer of the adsorbent column and at different filtration rates of the solution. The length of working layer of the column with CAN-7 has been determined as a function of the initial concentration of strontium ions and filtration rates. The activated carbon CAN-7 with adsorbed strontium ions is completely regenerated by 0.36% of hydrochloric acid. The obtained results for the process of adsorption of strontium ions from aqueous solutions on the CAN-7 activated carbon under dynamic conditions has demonstrated the option of removing this pollutant from the deep waters.