Aburub , Samer, Nur Farahin Ab Manaf, Asmaa’ Mardhiah Rohisham, Nur Nadhirah Mohamad Zain, Norazzizi Nordin, and Nurul Yani Rahim. “Silica Modified With Choline chloride/Urea DES for Ligand-Free Cu(II) Adsorption: Scientific Paper”. Journal of the Serbian Chemical Society 91, no. 7-8 (August 6, 2026): 809–822. Accessed October 14, 2026. https://shd-pub.org.rs/index.php/JSCS/article/view/13520.