<p>The aim of this study is to remove ¹²⁵Sb and ⁶⁰Co from low-level liquid radioactive waste using Analytical Grade Activated Carbon (AGAC) as an adsorbent&#xa0;from a research reactor coolant waste. AGAC is a highly porous adsorbent used to remove metals/pollutants from water. The AGAC was characterized using SEM, EDX, and FT-IR. Experimental studies included Point of Zero Charge, fixed bed, and batch studies. In the fixed bed study, breakthrough curves were determined for different bed heights and flow rates to optimize the sorption capacity of the adsorbent. Cycle III of AGAC showed the highest breakthrough capacity at 964.28 Bq/g for ¹²⁵Sb and 2530 Bq/g for ⁶⁰Co with specific conditions. The Thomas model was found to be the best fit for the fixed bed study results. In the batch study, various parameters such as contact duration, adsorbent dose, pH, temperature, and initial activity were optimized using isotherm and kinetic models. The Freundlich Isotherm Model and Pseudo 2nd Order kinetic model were the best fits for ¹²⁵Sb and ⁶⁰Co adsorption with AGAC, respectively, based on the R² values obtained.</p> Graphical Abstract <p></p>