期刊
CELLULOSE
卷 27, 期 10, 页码 5893-5905出版社
SPRINGER
DOI: 10.1007/s10570-020-03192-9
关键词
Calotropis gigantea fiber; Magnetic; Biochar; PFOA; PFOS; Fast removal
资金
- National Natural Science Foundation of China [21477135, 21675069]
- Fundamental Research Funds for the Central Universities [lzujbky-2019-95]
Using Calotropis gigantea fiber (CGF) as the bio-template, the magnetic carbonized fiber (MC-CGF) was successfully prepared by anchoring Fe3O4 onto CGF surface via pyrolysis, and well characterized by means of instrumental analysis. Subsequently, MC-CGF was used as the adsorbent to remove perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS) from water. The adsorption equilibrium of PFOA and PFOS on MC-CGF could be achieved within 1 h and 2 h, with maximum adsorption capacity of similar to 200 mg/g for them at pH 3.0. Coexisting ions (Na+, Mg2+, Fe3+) promoted the adsorption efficiency of MC-CGF to PFOA/PFOS, in particular for multivalent metal cations. During the adsorption process, hydrophobic interaction was principally involved, and was considered to be the driving force for fast removal of perfluoroalkyl pollutants. Such a hydrophobic-driven interaction was further evidenced using other perfluoroalkyl pollutants with different C-F chain length and functional groups as the models. Finally, MC-CGF was easily regenerated and recycled many times, demonstrating its potential for removing perfluoroalkyl pollutants from water in the future. [GRAPHICS] .
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