期刊
EUROPEAN POLYMER JOURNAL
卷 120, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.eurpolymj.2019.08.025
关键词
Magnetic polymer nanotube; Adsorption; Modification; Methylene blue; Mechanism
资金
- National Natural Science Foundation of China [51003098, 21101141, 51473149]
- Outstanding Young Talent Research Fund of Zhengzhou University [1521320002]
- Natural Science Foundation of Henan [162300410252]
- Foundation of Henan General Science and Technology Project [182102310074]
Developing excellent dye adsorbent with high adsorption capability and good reusability and clarifying the interaction mechanism between adsorbent and adsorbate are highly desired for eliminating water pollution. Herein, we present a novel magnetic adsorbent Fe3O4/poly(cyclotriphosphazene-co-4,4'-sulfonyldiphenol) nanotube modified by glacial acetic acid (defined as Gl-PZSNTs-Fe3O4) to remove cationic dye methylene blue (MB) from aqueous solution. Compared with the unmodified magnetic PZSNTs-Fe3O4, the Gl-PZSNTs-Fe3O4 exhibits rapid adsorption rate and high adsorption capacity. The adsorption equilibrium data was fitted well with Langmuir model, and the adsorption kinetics obeyed the pseudo-second-order kinetics model and Elovich model. Thermodynamic analysis showed that the MB adsorption onto the Gl-PZSNTs-Fe3O4 was endothermic and spontaneous. Especially, through contrasting the adsorption behavior of Gl-PZSNTs-Fe3O4 and PZSNTs-Fe3O4 towards MB dye, we highlighted the importance of glacial acetic acid modification for enhancing the adsorption capacity of the Gl-PZSNTs-Fe3O4. Meanwhile, we also proposed the adsorption mechanism of the Gl-PZSNTs-Fe3O4 towards MB dye.
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