Abstract
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 of hydrogels composited with MOFs and polymers was designed to improve the poor mechanical properties of natural polymer gel materials and the inconvenience of powdered MOFs materials in practical applications. The adsorption results showed that the optimum adsorption process of Cu (II) pH was 5.0. The adsorption kinetics and isotherm suggest that the adsorption process follows the Freundlich isotherm and the pseudo-second-order models. The experimental maximum adsorption capacity was 98.98 mg/g, 2.6 times and 1.5 times higher than ordinary SA and PVA/SA hydrogel spheres. Synthesized hydrogel spheres were characterized by FT-IR, SEM, XRD, and XPS, which confirmed that MOF materials have grown in situ on PVA/SA hydrogel spheres. More importantly, PVA/SA@ZIF-9 exhibited exceptional mechanical stability and showed excellent recycling capability in the cyclic adsorption process.
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The authors are grateful for the financial support from Qinghai Province Thousand Talents Program funded project.
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GZ: Experimentalize, Data collection, Writing-original draft. GY: Investigation, Aid with Synthesis and Preliminary Characterization. HC: Data curation, Formal analysis. HF: Supervision, Writing-review & editing.
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Zhang, G., Chen, H., Yang, G. et al. Preparation of In Situ ZIF-9 Grown on Sodium Alginate/Polyvinyl Alcohol Hydrogels for Enhancing Cu (II) Adsorption from Aqueous Solutions. J Inorg Organomet Polym 32, 4576–4588 (2022). https://doi.org/10.1007/s10904-022-02463-1
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DOI: https://doi.org/10.1007/s10904-022-02463-1