Extraction of Al and Ce from coal fly ash by biogenic Fe3+ and H2SO4

doi:10.1016/j.cej.2019.04.014

CORC > 上海应用物理研究所 > 中国科学院上海应用物理研究所 > 中科院上海应用物理研究所2011-2017年

	Extraction of Al and Ce from coal fly ash by biogenic Fe3+ and H2SO4
	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
	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
内容类型	期刊论文
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.