Efficient removal of Cd(II) by core-shell Fe3O4@polydopamine microspheres from aqueous solution

Chengwei Sun; Yi Xie; Xuemei Ren; Gang Song; Ahmed Alsaedi; Tasawar Hayat; Changlun Chen

doi:10.1016/j.molliq.2019.111724

Efficient removal of Cd(II) by core-shell Fe₃O₄@polydopamine microspheres from aqueous solution

Chengwei Sun
, Yi Xie
, Xuemei Ren
, Gang Song
, Ahmed Alsaedi
, Tasawar Hayat
, Changlun Chen

CAS - Institute of Plasma Physics
University of Science and Technology of China
Guangzhou University
Faculty of Sciences, King Abdulaziz University

Research output: Contribution to journal › Article › peer-review

37 Scopus citations

Abstract

In this study, the functional core-shell structure Fe₃O₄@PDA microspheres with strong saturation magnetism was successfully prepared by in-situ polymerization method. The microstructures, morphologies and chemical components of obtained samples were systematically analyzed. The maximum removal capacity of Fe₃O₄@PDA microspheres towards Cd(II) was 296.4 mg·g⁻¹ at 298 K. The removal process of Cd(II) conformed pseudo-second-order kinetic model well. In addition, the significant effects of pH and ionic strength on the adsorption performance were also researched by batch adsorption experiment. Furthermore, the adsorption capacity of Fe₃O₄@PDA remained at a relatively high level after five cycles, which implied that it possessed high reusability as an adsorbent. Therefore, the prepared Fe₃O₄@PDA microspheres could be recognized as excellent adsorbents for Cd(II) removal from polluted water.

Original language	English
Article number	111724
Journal	Journal of Molecular Liquids
Volume	295
DOIs	https://doi.org/10.1016/j.molliq.2019.111724
State	Published - 1 Dec 2019
Externally published	Yes

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 6 Clean Water and Sanitation

Keywords

Cd(II)
FeO
FeO@PDA
Removal mechanism

Access to Document

10.1016/j.molliq.2019.111724

Cite this

@article{3c72c3dae9da481298e9561046305c4a,

title = "Efficient removal of Cd(II) by core-shell Fe3O4@polydopamine microspheres from aqueous solution",

abstract = "In this study, the functional core-shell structure Fe3O4@PDA microspheres with strong saturation magnetism was successfully prepared by in-situ polymerization method. The microstructures, morphologies and chemical components of obtained samples were systematically analyzed. The maximum removal capacity of Fe3O4@PDA microspheres towards Cd(II) was 296.4 mg·g−1 at 298 K. The removal process of Cd(II) conformed pseudo-second-order kinetic model well. In addition, the significant effects of pH and ionic strength on the adsorption performance were also researched by batch adsorption experiment. Furthermore, the adsorption capacity of Fe3O4@PDA remained at a relatively high level after five cycles, which implied that it possessed high reusability as an adsorbent. Therefore, the prepared Fe3O4@PDA microspheres could be recognized as excellent adsorbents for Cd(II) removal from polluted water.",

keywords = "Cd(II), FeO, FeO@PDA, Removal mechanism",

author = "Chengwei Sun and Yi Xie and Xuemei Ren and Gang Song and Ahmed Alsaedi and Tasawar Hayat and Changlun Chen",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier B.V.",

year = "2019",

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day = "1",

doi = "10.1016/j.molliq.2019.111724",

language = "English",

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TY - JOUR

T1 - Efficient removal of Cd(II) by core-shell Fe3O4@polydopamine microspheres from aqueous solution

AU - Sun, Chengwei

AU - Xie, Yi

AU - Ren, Xuemei

AU - Song, Gang

AU - Alsaedi, Ahmed

AU - Hayat, Tasawar

AU - Chen, Changlun

PY - 2019/12/1

Y1 - 2019/12/1

N2 - In this study, the functional core-shell structure Fe3O4@PDA microspheres with strong saturation magnetism was successfully prepared by in-situ polymerization method. The microstructures, morphologies and chemical components of obtained samples were systematically analyzed. The maximum removal capacity of Fe3O4@PDA microspheres towards Cd(II) was 296.4 mg·g−1 at 298 K. The removal process of Cd(II) conformed pseudo-second-order kinetic model well. In addition, the significant effects of pH and ionic strength on the adsorption performance were also researched by batch adsorption experiment. Furthermore, the adsorption capacity of Fe3O4@PDA remained at a relatively high level after five cycles, which implied that it possessed high reusability as an adsorbent. Therefore, the prepared Fe3O4@PDA microspheres could be recognized as excellent adsorbents for Cd(II) removal from polluted water.

AB - In this study, the functional core-shell structure Fe3O4@PDA microspheres with strong saturation magnetism was successfully prepared by in-situ polymerization method. The microstructures, morphologies and chemical components of obtained samples were systematically analyzed. The maximum removal capacity of Fe3O4@PDA microspheres towards Cd(II) was 296.4 mg·g−1 at 298 K. The removal process of Cd(II) conformed pseudo-second-order kinetic model well. In addition, the significant effects of pH and ionic strength on the adsorption performance were also researched by batch adsorption experiment. Furthermore, the adsorption capacity of Fe3O4@PDA remained at a relatively high level after five cycles, which implied that it possessed high reusability as an adsorbent. Therefore, the prepared Fe3O4@PDA microspheres could be recognized as excellent adsorbents for Cd(II) removal from polluted water.

KW - Cd(II)

KW - FeO

KW - FeO@PDA

KW - Removal mechanism

UR - https://www.scopus.com/pages/publications/85073098654

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DO - 10.1016/j.molliq.2019.111724

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JO - Journal of Molecular Liquids

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