title: EXAFS study of copper in waste incineration fly ashes.
abstract: Copper species such as CuCO3, Cu(OH)2, CuS and CuO were found in the bag house and EP (electrostatic precipitator) fly ashes of waste incineration processes by X-ray absorption near edge structural (XANES) spectroscopy. A small amount of Cu(I) and metallic Cu was found in the bag house fly ash. The averaged Cu-O bond distance in the fly ashes determined by EXAFS (extended X-ray absorption fine structural) was 1.96 A with coordination numbers of 2.4-3.9. However, the Cu-(O)-Cu (2nd shell) bond distance of the fly ashes in the incineration process was decreased by 0.19-0.21 A if compared to that of the CuO standard. The coordination numbers of the 2nd shell contribution to the bag house fly ash were not very significant.
authors.affiliation: Department of Environmental Engineering, National Cheng Kung University, Tainan, Taiwan, ROC.
authors.forename: M C
authors.initials: MC
authors.lastname: Hsiao
authors.forename: H P
authors.initials: HP
authors.lastname: Wang
authors.forename: Y J
authors.initials: YJ
authors.lastname: Huang
authors.forename: Y W
authors.initials: YW
authors.lastname: Yang
mesh_terms: D002244:Carbon / Q000032:analysis*; D002254:Carbonates / Q000032:analysis; D060729:Coal Ash; D003300:Copper / Q000032:analysis* / Q000737:chemistry; D005583:Fourier Analysis; D006878:Hydroxides / Q000032:analysis; D017745:Incineration; D052638:Particulate Matter; D013052:Spectrometry, X-Ray Emission / Q000379:methods
chemical_list: D002254:Carbonates; D060729:Coal Ash; D006878:Hydroxides; D052638:Particulate Matter; C001606:cupric hydroxide; D002244:Carbon; D003300:Copper; C086270:copper carbonate; C017846:cupric sulfide; C030973:cupric oxide