Adsorptive Elimination of Recalcitrant Metallic Contaminants from Aqueous Effluents Employing a CuO‐Encapsulated Hydrogel Nanocomposite Supported by Cassia Nodosa‐Derived Biochar. - Sajid, Sehar; Nadeem, Raziya; Ali, Abid; Kashif, Ali Raza; Younas, Muhammad Usama; Noreen, Saima; Gill, Rohama; Nadeem, Sania (ChemistrySelect, 2025)