Thermal separation of heavy metals from municipal solid waste incineration fly ash: A review
Chemical Engineering Journal(2023)
Abstract
•Review the advanced thermal separation methods for heavy metals in MSWI fly ash.•Chlorination of heavy metals by NaCl/KCl requires excitation of Si-Al matrix.•Chlorides make heavy metals more volatile, but molten salts system does not.•XAFS is beneficial for exploring the thermal separation mechanism of heavy metals.•Recovery of heavy metals has good social benefits but poor economic benefits.
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Key words
Waste incineration fly ash,Heavy metal,Thermal separation,Carbothermal reduction,Molten salts,Chlorination
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