Minh Thanh Le et al. 2025. BIOCHAR FROM AGRICULTURAL BY-PRODUCTS IN VIETNAM: A REVIEW OF AN ADSORPTION SOLUTION FOR AMMONIUM AND PHOSPHATE REMOVAL IN WASTEWATER. HUIT Journal of Science. 25, S2_ICA (Jul. 2025), 99–114. DOI:https://doi.org/10.62985/j.huit_ojs.vol25.noS2_ICA.220.