The dynamic adsorption/elution properties of a fibrous grafted adsorbent having sulfonic acid (SO₃H) groups was evaluated by column-mode adsorption/elution tests for various cations. The fibrous grafted adsorbent could efficiently function even under high flow rate condition. The breakthrough points at 25, 50, 100, 200, 500 and 1000 h⁻¹ in space velocity were 369, 333, 322, 314, 294 and 265 bed volume (BV), and the breakthrough capacity of the six flow rates were 1.38, 1.25, 1.25, 1.18, 1.10 and 0.99 mmol-Cu²⁺/g-adsorbent, respectively. The affinity order of the fibrous grafted adsorbent for cations depended on the cationic size and valence: the larger the cationic size and valence, the greater the affinity became. As for the different-charged cations, the SO₃H group had a higher affinity for the more multiply-charged cations. All the adsorbed cations could only be eluted by 1 M HNO₃ aqueous solution of less than 30 BV, and the recovery of each cation was reached over 90%. When the cationic mixture aqueous solution consisting various cations was continuously supplied to the column, the cation with stronger affinity for the SO₃H groups expelled the cation with weaker affinity previously adsorbed by the SO₃H groups with increasing feed volume. When the mixture aqueous solution consisting of monovalent, divalent and tervalent cations, was used, the fibrous grafted adsorbent preferentially adsorbed than the monovalent and divalent cations.