Preparation of In Situ ZIF-9 Grown on Sodium Alginate/Polyvinyl Alcohol Hydrogels for Enhancing Cu (II) Adsorption from Aqueous Solutions

Metal–organic framework materials(ZIF-9) were loaded on Sodium alginate/polyvinyl(PVA/SA) hydrogel by in situ growth method for adsorption of heavy metal Cu (II). The structure hydrogels composited with MOFs and polymers was designed to improve the poor mechanical properties natural polymer gel materials inconvenience powdered practical applications. results showed that optimum process (II) pH 5.0. kinetics isotherm suggest follows Freundlich pseudo-second-order models. experimental maximum capacity 98.98 mg/g, 2.6 times 1.5 higher than ordinary SA PVA/SA spheres. Synthesized spheres characterized FT-IR, SEM, XRD, XPS, which confirmed MOF have grown More importantly, PVA/SA@ZIF-9 exhibited exceptional stability excellent recycling capability cyclic process.