Extraction of Al and Ce from coal fly ash by biogenic Fe3+ and H2SO4
文献类型：期刊论文
| 作者 | Fan, XL; Lv, SQ; Xia, JL; Nie, ZY; Zhang, DR; Pan, X; Liu, LZ; Wen, W; Zheng, L; Zhao, YD |
| 刊名 | CHEMICAL ENGINEERING JOURNAL
 |
| 出版日期 | 2019 |
| 卷号 | 370期号:-页码:1407—1424 |
| 关键词 | BONDING-STATE CHARACTERIZATION RARE-EARTH-ELEMENTS IRON L-EDGE CONSTITUENT ELEMENTS ALUMINUM RECOVERY SILICATE REMOVAL SPECTROSCOPY SPECIATION |
| ISSN号 | 1385-8947 |
| DOI | 10.1016/j.cej.2019.04.014 |
| 文献子类 | 期刊论文 |
| 英文摘要 | Coal fly ash (CFA), a waste byproduct of thermal power plants, is a major dust pollution source and a resource bearing valuable metals, such as Al and Ce. Metal bioleaching from CFA can be cost-effective for disposal with significant economic and environmental benefits. The goal of this study was to evaluate the bioleaching of Al and Ce from CFA by meso-acidophilic Acidithiobacillus ferrooxidans with the addition of pyrite after CFA was activated by roasting with Na2CO3 at a mass ratio 1:0.22 (w/w) to quantitatively transform the principal Al-bearing minerals mullite and sillimanite into nepheline and Al2O3. Optimal leaching of Al (91.2% after 12 days of incubation) and Ce (63.4% after 8 days of incubation) was achieved at a mass ratio of pyrite to activated CFA (a-CFA) 1.5:1, pulp density 20 g/L, initial pH 1.75 and initial inoculum 2 x 10(8)/ml. As pyrite was bioleached, the species S-2(-), S-2(2-) and S-n(2-) were transformed to S-0 and then to SO42-, and pyrite was converted to Fe(III)-containing species. With the accumulation of jarosites and the dissolution of a-CFA, amorphous phases containing Al2SiO5, interconnected [SiO4]-[AlOn] units, and SiO2 gel, mineralogical phases containing beaverite and pyrophyllite were successively generated. These results indicated that the oxidation of pyrite driven by A. ferrooxidans significantly promoted the dissolution of a-CFA for metal extraction. Compared with metal bioleaching from CFA in previous studies, the route of activation combined with bioleaching has resulted in significant progress in metal recovery. |
| 语种 | 英语 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/31623]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 作者单位 | 1.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China; 2.Cent S Univ, Sch Minerals Proc & Bioengn, Changsha 410083, Peoples R China; 3.Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Facil, Beijing 100049, Peoples R China 4.Cent S Univ, Minist Educ China, Key Lab Biomet, Changsha 410083, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Fan, XL,Lv, SQ,Xia, JL,et al. Extraction of Al and Ce from coal fly ash by biogenic Fe3+ and H2SO4[J]. CHEMICAL ENGINEERING JOURNAL,2019,370(-):1407—1424. |
| APA | Fan, XL.,Lv, SQ.,Xia, JL.,Nie, ZY.,Zhang, DR.,...&Zhao, YD.(2019).Extraction of Al and Ce from coal fly ash by biogenic Fe3+ and H2SO4.CHEMICAL ENGINEERING JOURNAL,370(-),1407—1424. |
| MLA | Fan, XL,et al."Extraction of Al and Ce from coal fly ash by biogenic Fe3+ and H2SO4".CHEMICAL ENGINEERING JOURNAL 370.-(2019):1407—1424. |
入库方式： OAI收割
来源：上海应用物理研究所
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