Adsorption of Cu(II) from solution by modified magnetic starch St/Fe3O4-g-p(AA-r-HEMA)

Chengmin Hou; Hanxiao Ma; Congjun Cao; Xiaojian Ding; Jingting Duan

doi:10.1039/D1NJ02335G

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Adsorption of Cu(ii) from solution by modified magnetic starch St/Fe₃O₄-g-p(AA-r-HEMA)

Chengmin Hou,*^a Hanxiao Ma,^a Congjun Cao,

*^a Xiaojian Ding^a and Jingting Duan

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* Corresponding authors

^a Key Laboratory of Printing and Packaging Engineering of Shaanxi Province, Faculty of Printing, Packaging Engineering and Digital Media Technology, Xi’an University of Technology, Xi’an 710048, Shaanxi, China
E-mail: 1042067175@qq.com, mhx_nicole@163.com

Abstract

The composite particles (St/Fe₃O₄) of starch and Fe₃O₄ were prepared by a co-precipitation method. Then AA and HEMA were grafted and cross-linked on St/Fe₃O₄ by a one-step method to obtain St/Fe₃O₄-g-p(AA-r-HEMA). The effects of the adsorbent dosage, pH value, initial Cu(II) concentration, time and temperature on adsorption were studied. Experiments showed that St/Fe₃O₄-g-p(AA-r-HEMA) showed a good adsorption performance for Cu(II), with a unit adsorption capacity of 75.5 mg g⁻¹ and a maximum removal rate of 95.0%. The adsorption process followed the Langmuir model and the pseudo-second-order kinetic model, was dominated by chemical adsorption, and belonged to single-layer adsorption. Renewable performance studies showed that after 8 adsorption cycles, 91.2% of the first adsorption effect was still retained.

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Article information

DOI: https://doi.org/10.1039/D1NJ02335G
Article type: Paper
Submitted: 12 May 2021
Accepted: 26 Aug 2021
First published: 27 Sep 2021

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New J. Chem., 2021,45, 19032-19042

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Adsorption of Cu(II) from solution by modified magnetic starch St/Fe₃O₄-g-p(AA-r-HEMA)

C. Hou, H. Ma, C. Cao, X. Ding and J. Duan, New J. Chem., 2021, 45, 19032 DOI: 10.1039/D1NJ02335G

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