Acid controlled washing of municipal solid waste incineration fly ash: Extraction of calcium inhibiting heavy metals and reaction kinetics

Washing method has attracted much attention in the research of municipal solid waste incineration (MSWI) fly ash treatment and resource utilization. However, the controlled leaching of heavy metals and the extraction of recyclable calcium in the washing process are still blank. Acid controlled washi...

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Bibliographic Details
Published in:The Science of the total environment 2024-01, Vol.909, p.168599-168599, Article 168599
Main Authors: Chen, Kailun, Han, Siyu, Meng, Fanzhi, Lin, Li, Li, Jinglin, Gao, Yuchen, Qin, Weikai, Jiang, Jianguo
Format: Article
Language:English
Subjects:
Acid washing
Calcium extraction
Heavy metals
MSWI fly ash
Reaction kinetics
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Summary:Washing method has attracted much attention in the research of municipal solid waste incineration (MSWI) fly ash treatment and resource utilization. However, the controlled leaching of heavy metals and the extraction of recyclable calcium in the washing process are still blank. Acid controlled washing was conducted with different acids, concentrations, times and temperatures to extract calcium while inhibiting heavy metals. The mechanism was investigated by reaction kinetics calculation and washed fly ash characterization. The high Ca concentration of 37,420 mg/L while the low heavy metal concentrations of around or
ISSN:0048-9697
1879-1026
DOI:10.1016/j.scitotenv.2023.168599