Excessive phosphorus overloading in lakes, which leads to eutrophication, is detrimental to the aquatic ecosystem and water quality. The use of adsorption to remove phosphorus is now an attractive method of treatment due to its easy operation and low cost. The study compared the adsorption of phosphorus using two factors: a commercial phosphorus locking agent and iron-aluminium residual materials (FARS) generated during water treatment procedures. The pseudo-phosphate wastewater was studied in terms of adsorption kinetics and isotherms using batch experiments. It was generated by the results that FARs experienced much higher phosphorus adsorption concentrations per kinetic function (qm = 18.35 mg/g) than the phosphorus locking agent (qm = 3.69 mg/g), and in both instances, provided viable fits to pseudo-second-order kinetic models (R² more than 0.98). The brain of the phosphorus locking agent under test by Isotherm yielded results in the cases of both the Langmuir model (qm = 25.06 mg/g vs 16.87 mg/g versus FARs) and in the F-type and L-type best practices, both of which gave a positive result, although some cases yielded no result. The increased kinetic activity of FARs can be explained by the high and productive production of surface hydroxyl groups on iron and aluminium oxides, which offer an opportunity for the chemical complexation of phosphate ions by forming Fe-O-P and Al-O-P bonds. When used to treat phosphorus in polluted water sources, such results suggest that FARs represent a cost-efficient and environmentally friendly alternative, as they are offered to guarantee the stabilization of the waste while simultaneously improving water quality.