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Novel Polyethyleneimine/κ-Carrageenan Composite from Facile One-Step Fabrication for the Removal of Copper Ion from Aqueous Solution

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Abstract

In this work, a novel PEI/CG composite was fabricated via a facile one-step strategy at ambient conditions using biodegradable and highly absorbent κ-carrageenan (CG) as a matrix, polyethyleneimine (PEI) as a functional component and poly(ethylene glycol) diglycidyl ether (PGDE) for cross-linking PEI/CG. Systematic investigations were carried out to determine the optimal PEI/CG mass ratio, PGDE/PEI mass ratio and the total concentration of CG and PEI in CG/PEI/PGDE/5 wt% NaOH solution. Batch adsorption experiments have been achieved to investigate the effects of different parameters including solution pH, adsorbent dose, initial Cu2+ concentration, solution temperature and contact time on the adsorption performance of the composite towards Cu2+. Interestingly, the PEI/CG composite showed efficient Cu2+ adsorption performance. Furthermore, adsorption kinetics, thermodynamics and isotherms have also been investigated to reveal Cu2+ adsorption behavior and mechanism by the composite during the Cu2+ adsorption process. In addition, the PEI/CG composite after Cu2+ adsorption was also investigated with FT-IR and EDS technique to estimate adsorbed Cu2+ onto the composite. This work opened up new horizons for the fabrication of novel PEI composite with practical application using a facile one-step fabrication strategy.

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Acknowledgements

This work was supported by the Changsha Science and Technology Plan (kq1902045), Henan Province Science and Technology Research Plan (212102210288) and SRTP Program, Henan University of Science and Technology (2020140).

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  1. School of Chemical Engineering and Pharmaceutics, Henan University of Science and Technology, Luoyang, 471023, Henan, People’s Republic of China

    Fen Wang, Tongtong Duo, Yongxin Wang & Airong Xu

  2. State Key Laboratory of Utilization of Woody Oil Resource, Hunan Academy of Forestry, Changsha, 410004, Hunan, People’s Republic of China

    Zhihong Xiao & Rukuan Liu

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  1. Fen Wang
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Wang, F., Duo, T., Wang, Y. et al. Novel Polyethyleneimine/κ-Carrageenan Composite from Facile One-Step Fabrication for the Removal of Copper Ion from Aqueous Solution. J Polym Environ 30, 1001–1011 (2022). https://doi.org/10.1007/s10924-021-02247-7

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