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In relation to this article, we declare that there is no conflict of interest.
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Received March 25, 2022
Accepted May 7, 2022
articles This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Synthesis of polyethylenimine-modified magnetic hydrogel nanocomposite absorbents for heavy metals removal

1State Key Lab of Geohazard Prevention & Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, Sichuan, China 2Mineral Resources Chemistry Key Laboratory of Sichuan Higher Education Institutions, Chengdu University of Technology, Chengdu 610059, Sichuan, China
wantaos@126.com
Korean Journal of Chemical Engineering, November 2022, 39(11), 3138-3145(8), 10.1007/s11814-022-1168-2
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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) (217mg/g), Cd(II) (232mg/g) and Pb(II) (459mg/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% PEImodified 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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