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Speciation of Cu and Zn in bottom ash from solid waste incineration studied by XAS, XRD, and geochemical modelling

Tiberg, Charlotta and Sjöstedt, Carin and Fedje, Karin Karlfeldt (2021). Speciation of Cu and Zn in bottom ash from solid waste incineration studied by XAS, XRD, and geochemical modelling. Waste Management. 119 , 389-398
[Research article]

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Abstract

Millions of tons of bottom ash (BA) is generated from incineration of industrial and municipal solid waste each year within EU. The magnitude of leaching of metals like Cu and Zn is critical for hazard and risk assessment of these ashes. Although speciation of metals is a key factor to understand and predict metal leaching, speciation of Cu and Zn in BA is not well known. In this study six metal separated and carbonized BA were investigated by a combination of X-ray absorption spectroscopy, X-ray diffraction, leaching/extraction tests, and geochemical modelling. Five of the BA were from grate boilers and one from a fluidized bed incinerator. The aims were to identify similarities in Cu and Zn speciation and to identify main species. The combination of several techniques was necessary to draw conclusions about speciation and displayed coherent results. A similar speciation of Cu and Zn was indicated in the five studied grate boiler ashes although the proportions between species may vary. Copper(II) oxide and Cu metal were the main Cu species in all BA. Zinc(II) oxide and willemite (Zn2SiO4) were identified in grate boiler ashes. The fluidized bed ash contained Zn-Si-minerals and possibly franklinite or gahnite, while the Zn(II) oxide content was low, if any. The results have implications for classification and risk assessment of MIBA. (C) 2020 The Authors. Published by Elsevier Ltd.

Authors/Creators:Tiberg, Charlotta and Sjöstedt, Carin and Fedje, Karin Karlfeldt
Title:Speciation of Cu and Zn in bottom ash from solid waste incineration studied by XAS, XRD, and geochemical modelling
Series Name/Journal:Waste Management
Year of publishing :2021
Volume:119
Page range:389-398
Number of Pages:10
Publisher:PERGAMON-ELSEVIER SCIENCE LTD
ISSN:0956-053X
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Soil Science
Keywords:Bottom ash, Copper, Zinc, Speciation, Leaching, EXAFS
URN:NBN:urn:nbn:se:slu:epsilon-p-110054
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-110054
Additional ID:
Type of IDID
DOI10.1016/j.wasman.2020.10.023
Web of Science (WoS)000599766200037
ID Code:21432
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Soil and Environment
(S) > Dept. of Soil and Environment
Deposited By: SLUpub Connector
Deposited On:21 Jan 2021 10:44
Metadata Last Modified:21 Jan 2021 10:51

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