A Laboratory Study for Alginate Hydrogel Extracted from the Brown Marine Algae (Sargassum vulgare) for the Simultaneous Removal of Lead (Pb²⁺), Cadmium (Cd²⁺), and Copper (Cu²⁺) Ions from Aqueous Solutions . Latakia University (formerly Tishreen) Journal for Research and Scientific Studies - Basic Sciences Series, v. 48, n. 2, p. 85–94, 14 Jun.2026.