Journal
CHEMOSPHERE
Volume 217, Issue -, Pages 270-278Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2018.11.023
Keywords
Chitosan; Functionalization; Diclofenac sodium; Fe3O4; Removal
Categories
Funding
- National Natural Science Foundation of China [21476212]
- Key research and development plan of Zhejiang Province [2018C02038]
- Funds of the Zhoushan Municipal Bureau of China [2017C41005]
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In this study, we prepared a magnetic composite based on amine-functionalized chitosan (aminochitosan; AmCS) and Fe3O4 to remove diclofenac sodium (DS) from water. The fabricated AmCS@Fe3O4 composite was characterized using Fourier-transform infrared spectroscopy, transmission electron microscopy, scanning electron microscopy, vibrating sample magnetometry, X-ray diffraction, and thermogravimetric analysis. Furthermore, we investigated the influence of pH, initial DS concentration, and adsorbent dosage on the adsorption of DS. Through thermodynamic analysis, we found that the data corresponded with the Langmuir adsorption isotherm model. The maximum adsorption capacity reached 469.48 mg g(-1), and the adsorption process followed the pseudo-second-order kinetic model. Finally, the AmCS@Fe3O4 composite retained good adsorption characteristics after four consecutive cycles, with removal efficiency exceeding 70%. Therefore, the developed adsorbent could be used for efficient adsorptive removal of trace drugs and personal care products from water bodies. (C) 2018 Elsevier Ltd. All rights reserved.
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