OPTIMISATION OF SULFURIC ACID CONCENTRATION FOR ENHANCED FE2+ ION REMOVAL USING ACTIVATED CHARCOAL FROM BOILED PEANUT SHELLS: CHARACTERISATION AND PERFORMANCE EVALUATION . LJEE. 2024;5(1):10-18. Accessed October 18, 2026. https://journal.ar-raniry.ac.id/index.php/lingkar/article/view/5080