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| Defluorination Performance of Red Mud Residue after Recovery of Al, Na and Fe |
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Received:August 30, 2018
Revised:September 06, 2018
Accepted:September 07, 2018
Published Online:December 21, 2018
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| DOI：doi：10.3969/j.issn.1007-7545.2019.01.016 |
| KeyWord:red mud; residue; high fluorine water; defluorination |
| Author | Institution |
| Lu Fanghai |
贵州理工学院材料与冶金工程学院 |
| Wang Zhicheng |
贵州理工学院材料与冶金工程学院 |
| Peng Nandan |
贵州理工学院材料与冶金工程学院 |
| LI Jian |
贵阳市城市发展投资集团股份有限公司 |
| Huang Fang |
贵州理工学院材料与冶金工程学院 |
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| Abstract: |
| Red mud has been widely studied as an adsorbent for wastewater treatment due to its containing active components in recent years. The residues, obtained from red mud after recovering aluminum, sodium and iron by reductive sintering-leaching-magnetic separation, still contain a certain amount of active components. Defluorination performance of residue for synthetic wastewater bearing 25 mg/L fluoride was investigated. Defluorination efficiency is 72.19% under the optimum conditions including initial pH value of 5, residue dosage of 15 g/L, temperature of 40 ℃, and adsorbing time of 30 min. |
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