期刊
SEPARATION AND PURIFICATION TECHNOLOGY
卷 281, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.seppur.2021.119879
关键词
Mo(VI); Re(VII); Cellulose microsphere; Radiation grafting; Separation
资金
- Innovation Special Project of Hubei Province [2017AEA107]
- Analysis and testing center of Huazhong University of Science and Technology
In this study, gallic acid-functionalized microcrystalline cellulose microspheres (MCGA) were synthesized and found to effectively separate Mo(VI) and Re(VII) with higher adsorption capacity and affinity towards Mo(VI). The dynamic column experiment showed selective recovery of Mo(VI) by MCGA, and different eluents can achieve stepwise elution of Mo(VI) and Re(VII. Additionally, the excellent adsorption properties of MCGA make it a potential candidate for separating Mo(VI) and Re(VII) from Mo-Re bearing solution.
It is significant to develop an effective adsorbent for the separation of Mo(VI) and Re(VII) owing to congenital isomorphism. Herein, gallic acid-functionalized microcrystalline cellulose microspheres (MCGA) were synthesized via radiation technology. Batch and column experiments were systematically performed to evaluate the separation behaviors for Mo(VI) and Re(VII). It was discovered that MCGA showed higher adsorption capacity and stronger affinity for Mo(VI) than Re(VII) under the tested condition. The separation of Mo(VI) and Re(VII) could be easily achieved by MCGA, exhibiting a separation factor (beta(Mo/Re)) in the range of 5.23-735.53. Significantly, the dynamic column experiment revealed that the MCGA could selectively recover Mo(VI) from a simulated leaching solution of molybdenite. In addition, different eluents can achieve the stepwise elution of Mo(VI) and Re(VII). With increasing temperature, Mo(VI) and Re(VII) could be more easily separation from the solution. Ultimately, the capture of Mo(VI) by MCGA was attributed to the formation of hydrogen bond and complexes between the adjacent phenolic hydroxyl group and metal ions, while Re(VII) was mainly associated with MCGA by hydrogen bond. Moreover, the excellent adsorption properties indicated that MCGA is a candidate for separation of Mo(VI) and Re(VII) from Mo-Re bearing solution.
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