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.; MASOUD, E. M. 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, v. 7, n. 1, p. 357-374, 29 jun. 2026.