Luu, G.H. et al. 2026. ENHANCING THE ADSORPTION CAPACITY OF Pb2+ AND Cu2+ IONS IN AQUEOUS SOLUTION USING POTASSIUM PERMANGANATE-MODIFIED BIOCHAR. Ho Chi Minh City University of Education Journal of Science. 23, 3 (Mar. 2026). DOI:https://doi.org/10.54607/hcmue.js.23.3.4408(2026).