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Outline
Iron and fluorine co-doped manganese ion sieve HMFeO-F was prepared by high temperature solid phase method. The effects of calcination temperature, calcination time and doping ratio on the structure of the ion sieve were investigated by XRD, SEM, FT-IR and BET, and its adsorption performance was studied. The results show that the adsorption capacity for lithium of HMFeO-F is 31.57 mg/g under the conditions of calcination temperature of 800 ℃, calcination time of 10 h, molar ratio of lithium to manganese of 1/2, and doping mole fractions of Fe and F of 5% and 10%, respectively. The Mn dissolution loss rate during the adsorption process is only 4.52%, which is 61% lower than that of the undoped. At the same time, the introduction of magnetic Fe3O4 makes the magnetic recovery rate of the material can reach 90.2%. After five cycles of tests, the equilibrium adsorption capacity for lithium of HMFeO-F can still reach 25.87 mg/g, and the manganese dissolution loss rate remains within 5%. For a coal gangue acid leaching solution with a lithium mass concentration of 12.98 mg/L, lithium is adsorbed by HMFeO-F, and the lithium adsorption rate can reach 99%. The use of ion sieve to extract lithium from coal gangue can not only develop a new way to extract lithium, but also is expected to achieve the high-value utilization of coal gangue.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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