Abstract
Polyethylenimine(PEI)-modified magnetic hydrogel nanocomposite absorbents (PEI-mHNAs) were fabricated based on poly(acrylamide-co-acrylic acid) and PEI-modified magnetic nanoparticles by radical copolymerization. FTIR and XRD results preliminarily confirmed the target structure of PEI-mHNAs without destroying the structure of magnetic nanoparticles during modification and radical copolymerization. PEI-mHNAs with many rough porous and interstitial structure had high adsorption capacity of Cu(II) (217 mg/g), Cd(II) (232 mg/g) and Pb(II) (459 mg/g). PEI-mHNAs had the best absorption capacity for heavy metal ions in the synthesis condition of acrylic acid/acrylamide mass ratio of 60:40, 0.8% initiator, AA neutralization degree of 70%, 0.75% crosslinker, and 15% PEI-modified magnetic nanoparticles. Moreover, PEI-mHNAs had good magnetic responsiveness, high thermal stability and reusability, which make it a potential application in removing heavy metal ions from the contaminated wastewater.
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Acknowledgements
This work was supported by the Key Research and Development Program of Sichuan province (Grant No. 2019YFG0264); Technology Foundation for Selected Overseas Chinese Scholar, Department of Personnel of Sichuan province (Grant No. 19BZ08009); State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Grant No. SKLGP2018Z005).
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Wan, T., He, S., Wang, T. et al. Synthesis of polyethylenimine-modified magnetic hydrogel nanocomposite absorbents for heavy metals removal. Korean J. Chem. Eng. 39, 3138–3145 (2022). https://doi.org/10.1007/s11814-022-1168-2
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DOI: https://doi.org/10.1007/s11814-022-1168-2