Study on the Oxidative Leaching of Uranium from the Lignite in the CO32-HCO3- System
Joint Authors
Li, Yilian
Ning, Y.
Zhang, Y.
Tang, P.
Source
Issue
Vol. 2017, Issue 2017 (31 Dec. 2017), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2017-12-19
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Abstract EN
Na2CO3/NaHCO3 mixtures with different oxidants were used to leach uranium in the lignite which was obtained from Lincang, Yunnan province.
The experimental results showed that the optimal solid/liquid ratio and CO32-/HCO3- ratio for uranium leaching were 1 : 20 (g/mL) and 2 : 1, respectively.
With the increase of carbon concentration from 0.1 mol/L to 1.1 mol/L, the leaching efficiency of uranium increased from 14.64% to 42.39% after 6 h leaching.
The oxidants could significantly enhance the uranium leaching efficiency, which was up to 72.23% by injecting O2 at 1.5 L/min after 12 h leaching.
The oxidative leaching process of uranium from the lignite was better fitted to the pseudo-second-order reaction model.
The sequential extraction results illustrated that the oxidants could effectively enhance the leaching of organic matter bound uranium in the lignite, which was decreased from 76.86 mg/kg to 9.00 mg/kg by injecting O2.
The infrared spectrum analysis demonstrated that the corresponding transmittance at about 3197 cm−1 was prominently reduced after the oxidative leaching, which intimated that the phenolic and alcoholic hydroxyl might be the main functional groups combined with uranium in the lignite.
American Psychological Association (APA)
Ning, Y.& Li, Yilian& Zhang, Y.& Tang, P.. 2017. Study on the Oxidative Leaching of Uranium from the Lignite in the CO32-HCO3- System. Geofluids،Vol. 2017, no. 2017, pp.1-8.
https://search.emarefa.net/detail/BIM-1155796
Modern Language Association (MLA)
Ning, Y.…[et al.]. Study on the Oxidative Leaching of Uranium from the Lignite in the CO32-HCO3- System. Geofluids No. 2017 (2017), pp.1-8.
https://search.emarefa.net/detail/BIM-1155796
American Medical Association (AMA)
Ning, Y.& Li, Yilian& Zhang, Y.& Tang, P.. Study on the Oxidative Leaching of Uranium from the Lignite in the CO32-HCO3- System. Geofluids. 2017. Vol. 2017, no. 2017, pp.1-8.
https://search.emarefa.net/detail/BIM-1155796
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1155796