“ OPTIMISATION OF SULFURIC ACID CONCENTRATION FOR ENHANCED FE2+ ION REMOVAL USING ACTIVATED CHARCOAL FROM BOILED PEANUT SHELLS: CHARACTERISATION AND PERFORMANCE EVALUATION ”, LJEE, vol. 5, no. 1, pp. 10–18, Nov. 2024, Accessed: Oct. 18, 2026. Available: https://journal.ar-raniry.ac.id/index.php/lingkar/article/view/5080