期刊
HYDROMETALLURGY
卷 179, 期 -, 页码 141-148出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.hydromet.2018.05.025
关键词
Imidazolium-based ionic liquids; Chitosan; Adsorption; Rhenium
资金
- National Natural Science Foundation of China [21201094, 21171080, 51674131]
- Scientific Research Found of Liaoning Provincial Education Department [L2014004]
- Program for Liaoning Excellent Talents in University [LR2015026]
- Liaoning Provincial Department of Education Innovation Team Projects [LT2015012]
- National Science Technology Ministry [2015BAB02B03]
In this study, a novel chitosan adsorbent (CS-MEIC) modified by imidazolium-based ionic liquid was prepared for the efficient adsorption of Re(VII). The results indicated that CS-MEIC could obtain higher uptake capacity for Re (VII) when the volume ratio of N-methyl imidazole to epichlorohydrin was 1:2, and the mass of the CS was 0.3 g. The adsorption process was described best by Langmuir monolayer adsorption model, and the maximum adsorption capacity was 185 mg.g(-1). The kinetic data could be fitted to a pseudo-second-order equation. Re(VII) was adsorbed on the CS-MEIC by anion exchange confirmed by FTIR, X-ray photoelectron spectroscopy and ion chromatography analysis. In addition, there was a good selectivity adsorption for Re(VII) compared with other coexisting metal ions Mn(II), Fe(III), Cu(H), and Zn(II). Furthermore, five adsorption-elution cycles suggested that the CS-MEIC adsorbent had good durability and efficiency, which was successfully used to recover rhenium with satisfactory results.
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