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Adsorption removal of methylene blue from aqueous solution on carbon-coated Fe3O4 microspheres functionalized with chloroacetic acid.

Zhang, Zefei; Kim, Cholhwan; Fernandez, Carlos; Sundaram, Manickam Minakshi; Ramakrishnappa, Thippeswamy; Wang, Yuhong; Wang, Linshan; Sun, Ting; Hu, Xiaomin

Authors

Zefei Zhang

Cholhwan Kim

Carlos Fernandez

Manickam Minakshi Sundaram

Thippeswamy Ramakrishnappa

Yuhong Wang

Linshan Wang

Ting Sun

Xiaomin Hu



Abstract

We report the preparation and employability of carbon-coated Fe3O4 (Fe3O4/C) microspheres functionalized with chloroacetic acid (CAA) for the removal of methylene blue (MB) in aqueous solution. The prepared magnetic microspheres (Fe3O4/C-CAA) were characterized by the following techniques: X-ray diffraction, transmission electron microscopy, Fourier-transform infrared spectrometer, vibrating sample magnetometry, and Brunauer-Emmett- Teller. The characterization results showed that Fe3O4/C microspheres were modified by CAA without any phase change. Fe3O4/C-CAA microspheres have higher adsorption capacity for MB compared to Fe3O4/C microspheres. The Langmuir, Freundlich, and Temkin adsorption models were applied to describe the equilibrium isotherms, and the Langmuir adsorption model fitted well with the equilibrium data. The pseudo-first-order and pseudo-secondorder kinetic models were used to describe the kinetics data. However, the pseudo-second-order kinetic model fitted better with the adsorption kinetics data.

Journal Article Type Article
Publication Date Mar 28, 2018
Journal Science and engineering of composite materials
Print ISSN 0334-181X
Electronic ISSN 2191-0359
Publisher De Gruyter Open
Peer Reviewed Peer Reviewed
Volume 25
Issue 2
Pages 353-361
Institution Citation ZHANG, Z., KIM, C., FERNANDEZ, C., SUNDARAM, M.M., RAMAKRISHNAPPA, T., WANG, Y., WANG, L., SUN, T. and HU, X. 2018. Adsorption removal of methylene blue from aqueous solution on carbon-coated Fe3O4 microspheres functionalized with chloroacetic acid. Science and engineering of composite materials [online], 25(2), pages 353-361. Available from: https://doi.org/10.1515/secm-2016-0138
DOI https://doi.org/10.1515/secm-2016-0138
Keywords Adsorption; Carbon coated Fe3O4 nanoparticles; Chloroacetic acid; Methylene blue

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