title: Content and fractionation of Cu, Zn and Cd in size fractionated municipal solid waste incineration bottom ash.
abstract: Municipal solid waste incinerator (MSWI) bottom ash was size fractionated into six fractions, with the respective particle size of <0.45 mm, 0.45-1 mm, 1-2 mm, 2-4 mm, 4-8 mm and >8 mm. The contents and fractionation of Cu, Zn, Cd in the size fractionated MSWI bottom ash were investigated. The results showed the contents and fractionation of Cu, Zn and Cd varied among the different particle sizes, which were related to their thermodynamic characteristics. High content of Cu was found in the bottom ash with the particle size of <0.45 mm and >4 mm, due to its lithophilic property and the function of entrainment. The content of Zn showed a relatively even distribution among the various particles. The content of Cd showed a decreasing trend with the increase of the particle size, due to its high volatility. Besides, the carbonate bound fraction of Cd showed a decreasing trend with the increase of the particle size, while the carbonate bound fraction of Cu showed an increasing trend. The organic matter bound fraction of Cu increased when the particle size increased. The results also showed the fine ash contained a higher level of unstable Cd than the large ash, while the large ash had a higher level of unstable Cu comparatively.
authors.affiliation: College of Life Science, Taizhou University, Linhai 317000, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Yao
authors.forename: Qingna
authors.initials: Q
authors.lastname: Kong
authors.forename: Huyue
authors.initials: H
authors.lastname: Zhu
authors.forename: Yuyang
authors.initials: Y
authors.lastname: Long
authors.forename: Dongsheng
authors.initials: D
authors.lastname: Shen
mesh_terms: D005591:Chemical Fractionation; D060729:Coal Ash / Q000032:analysis*; D015386:Hazardous Substances / Q000032:analysis*; D017745:Incineration; D019216:Metals, Heavy / Q000032:analysis*; D010316:Particle Size; D062611:Solid Waste
chemical_list: D060729:Coal Ash; D015386:Hazardous Substances; D019216:Metals, Heavy; D062611:Solid Waste