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Title:
Volatilization and leaching behavior of heavy metals in MSW incineration fly ash in a DC arc plasma furnace
Author: Ma, Wenchao; Fang, Yunhao; Chen, Dongmei; Chen, Guanyi; Xu YX(徐永香); Sheng HZ(盛宏至); Zhou, Zhihua
Source: FUEL
Issued Date: 2017-12-15
Volume: 210, Pages:145-153
Abstract: Three fly ash samples collected from different waste incinerators were vitrified using a direct current arc plasma furnace at 1250-1400 degrees C. The influence of water-wash extraction and wrapping pretreatment on the volatilization and leaching behavior of heavy metals was investigated. Results showed: After thermal arc plasma treatment, the volume reduction and weight loss of fly ash were in the range of 68.7-82.2% and 23.8-56.7%, respectively. The residual fractions (wt.%) of heavy metals in slag are in the following sequence: Cr < Ni < Cd < Pb < Cu < Zn. Water-washing could reduce the volatilization rate of heavy metals due to some volatile salts removed by washing, while wrapping of fly ash could most effectively resist heavy metals against volatilizing, especially for Zn and Ni. The possible CaO - Al2O3 - SiO2 (CAS) ratio for successful melting of fly ash is suggested to be CaO in range of 20-48%, Al2O3 in range of 10-15%, and SiO2 in range of 40-65%. Moreover, toxicity characteristic leaching procedure results showed that the leaching of heavy metals in slags was much lower than the standard limit of toxicity characteristic leaching procedure (TCLP).
Keyword: MSW incineration fly ash ; Heavy metals ; Volatilization and leaching behavior ; DC arc plasma ; CaO - Al2O3 - SiO2 (CAS)
Language: 英语
Indexed Type: SCI ; EI
Corresponding Author: Chen, GY (reprint author), Tianjin Univ, Sch Environm Sci & Engn, State Key Lab Engines, Tianjin 300072, Peoples R China.
Correspondent Email: mawc916@tju.edu.cn ; chen@tju.edu.cn
DOI: 10.1016/j.fuel.2017.07.091
DOC Type: Article
WOS Subject: Energy & Fuels ; Engineering, Chemical
WOS Subject Extended: Energy & Fuels ; Engineering
WOS Keyword Plus: SOLID-WASTE INCINERATOR ; WATER-EXTRACTION ; SOLIDIFICATION/STABILIZATION ; VITRIFICATION ; AGENTS ; SIO2
WOS ID: WOS:000413759500017
ISSN: 0016-2361
Funder: National Science and Technology Support Program of China(2014BAC02B03) ; High Technology Support Project of Tianjin(16PTGCCX00170 ; Tianjin Research Program of Application and Advanced Technology(15JCQNJC06600) ; 16YFXTSF00540)
Department: LHD应用等离子体力学(CPCR)
Classification: 一类
Ranking: 3
Citation statistics:
Content Type: 期刊论文
URI: http://dspace.imech.ac.cn/handle/311007/71935
Appears in Collections:高温气体动力学国家重点实验室_期刊论文

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Recommended Citation:
Ma, Wenchao,Fang, Yunhao,Chen, Dongmei,et al. Volatilization and leaching behavior of heavy metals in MSW incineration fly ash in a DC arc plasma furnace[J]. FUEL,2017-12-15,210:145-153.
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