Leaching characteristics of trace elements in hetero-aggregation fly ash from coal-fired power plant

LI Yang; HE Yong-lai; JIN Li-jun; LIU Jing-chao; HU Hao-quan

Volume 48 Issue 11

Nov. 2020

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Article Navigation > Journal of Fuel Chemistry and Technology > 2020 > 48(11): 1394-1401

LI Yang, HE Yong-lai, JIN Li-jun, LIU Jing-chao, HU Hao-quan. Leaching characteristics of trace elements in hetero-aggregation fly ash from coal-fired power plant[J]. Journal of Fuel Chemistry and Technology, 2020, 48(11): 1394-1401.

Citation:

LI Yang, HE Yong-lai, JIN Li-jun, LIU Jing-chao, HU Hao-quan. Leaching characteristics of trace elements in hetero-aggregation fly ash from coal-fired power plant[J]. Journal of Fuel Chemistry and Technology, 2020, 48(11): 1394-1401.

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Leaching characteristics of trace elements in hetero-aggregation fly ash from coal-fired power plant

1.
State Key Laboratory of Fine Chemicals, Institute of Coal Chemical Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
2.
State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China

Funds:

National Key R & D Program of China 2018YFB0605104

National Natural Science Foundation of China 21776039

the Fundamental Research Funds for the Central Universities DUT2018TB0

More Information

Corresponding author: HU Hao-quan, Tel:0411-84986157, E-mail:hhu@dlut.edu.cn
Received Date: 2020-09-11
Rev Recd Date: 2020-11-13

Available Online: 2021-01-23

Publish Date: 2020-11-10

Abstract

Abstract

This paper studied physicochemical and leaching characteristics of three hazardous trace elements As, Se and Pb in hetero-aggregation fly ash (HAFA) and coal fly ash (FA)samples which were collected from coal-fired power plant. The results show that the peak of particle size of HAFA is 138.04 and is 60.26 μm of FA; the fine particles agglomerate into large particles after agglomeration; the contents of heavy metals of As, Se and Pb in HAFA are all higher than those of in FA. The content of heavy metals in gypsum produced in the subsequent desulfurization process is decreased. The batch leaching experiments show that leaching concentrations of three metals in HAFA are suppressed by mild and alkaline condition for As, by acidic and alkaline condition for Se, and by alkaline condition for Pb. The column leaching experiments show that the leaching abilities of the trace elements in HAFA are inhibited in both acidic and aqueous solution.
- fly ash,
- hetero-aggregation,
- particles,
- trace elements,
- leaching

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References(25)

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