期刊
SEPARATION AND PURIFICATION TECHNOLOGY
卷 266, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.seppur.2021.118584
关键词
Flexible fiber; Self supporting; Super hydrophilic; Magnetic separation; Pb(II) adsorption
资金
- Shandong Provincial Natural Science Foundation [ZR2020ME023]
- Shandong University Young Scholars Program [2016WLJH27]
- Fundamental Research Funds for the Central Universities [2082019014]
Flexible MgFe2O4 magnetic fibers were prepared using electrospinning technology and sol-gel method, exhibiting high adsorption capacity and magnetic separation properties.
Flexible MgFe2O4 magnetic fibers were originally prepared by four spinning solutions using electrospinning technology together with sol-gel method, and applied to Pb(II) adsorption for the first time. The prepared MgFe2O4 fibers were flexible, super hydrophilic; and could be curled and folded at will. Maximum adsorption capacities of MgFe2O4 fibers prepared from the spinning solutions with CTAB contents of 0%, 4% and 8% for Pb (II) were 263.27, 276.87 and 283.13 mg/g, respectively. Among the MgFe2O4 based adsorbents, the flexible MgFe2O4 fibers prepared in this work exhibited the highest adsorption capacity for Pb(II). This indicated that the flexible fiber adsorbents were self-supporting in aqueous solutions without agglomeration, therefore fully exerting their adsorption active sites; and so, improve their adsorption capacities for pollutants. The saturation magnetizations of MgFe2O4 fibers prepared from 0%, 4% and 8% CTAB content spinning solutions were 6.7, 10.6, and 14.0 emu/g, respectively. After adsorption, the adsorbents could be quickly separated from the aqueous solutions by magnetic separation. Flexible fibers provide a new direction in avoiding agglomeration to maximize the adsorption capacity of the adsorbent.
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