Ahmed, D.F., Ella, A.A.A., Naeim, S., Mubarak, M.F., Nassar, M.Y., Adam, M.S.S., Alfurayj, I., Hammud, H.H., Ayoup, M.S. and Masoud, E.M. 2026. Tannin-Functionalized Hierarchical Porous Biochar from Lignocellulosic Waste for Simultaneous NH₄⁺ and NO₃⁻ Adsorption in Complex Wastewater via Ion-Exchange Synergy and Surface Complexation. Chemical Reports. 7, 1 (Jun. 2026), 357-374. DOI:https://doi.org/10.25082/CR.2026.01.003.