Application of micro-scale correlation analysis to estimate metal speciation and the matrix in municipal solid waste incineration fly ash

Hiroki Kitamura; Astryd Viandila Dahlan; Yu Tian; Takayuki Shimaoka; Takashi Yamamoto; Fumitake Takahashi

doi:10.1007/s10163-020-01001-w

Application of micro-scale correlation analysis to estimate metal speciation and the matrix in municipal solid waste incineration fly ash

Hiroki Kitamura, Astryd Viandila Dahlan, Yu Tian, Takayuki Shimaoka, Takashi Yamamoto, Fumitake Takahashi

Department of Civil Engineering

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

Micro-scale correlation analysis was applied to estimate metal speciation and the matrix in municipal solid waste incineration (MSWI) fly ash in this study. The results showed that dominant metal speciation and the bonding states with fly ash matrix are different in individual fly ash particle. Micro-scale correlation analysis also suggests metal behaviors in fly ash formation processes. Metal oxides likely react with and/or are trapped in Al/Ca/Si-based matrix such as aluminosilicate in the gas phase and then followed by KCl/NaCl adsorption on the surface. Zinc can possibly form other speciation depending on combustion condition. Zinc chlorides (ZnCl₂ and/or K₂ZnCl₄) and Zn spinels (ZnAl₂O₄ and ZnFe₂O₄) are not trapped in Al/Ca/Si-based matrix, however, adsorbed on the surface together with KCl/NaCl-based aggregates. Because metal oxides basically combine with and/or are trapped in Al/Ca/Si-based matrix, metal leachability might be controlled by not only metal oxide leachability but also leachability of Al/Ca/Si-based matrix around metal oxides.

Original language	English
Pages (from-to)	1081-1093
Number of pages	13
Journal	Journal of Material Cycles and Waste Management
Volume	22
Issue number	4
DOIs	https://doi.org/10.1007/s10163-020-01001-w
Publication status	Published - 1 Jul 2020

Keywords

Correlation analysis
Fly ash
Metal speciation
Municipal solid waste
SEM–EDX

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1007/s10163-020-01001-w

Cite this

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title = "Application of micro-scale correlation analysis to estimate metal speciation and the matrix in municipal solid waste incineration fly ash",

abstract = "Micro-scale correlation analysis was applied to estimate metal speciation and the matrix in municipal solid waste incineration (MSWI) fly ash in this study. The results showed that dominant metal speciation and the bonding states with fly ash matrix are different in individual fly ash particle. Micro-scale correlation analysis also suggests metal behaviors in fly ash formation processes. Metal oxides likely react with and/or are trapped in Al/Ca/Si-based matrix such as aluminosilicate in the gas phase and then followed by KCl/NaCl adsorption on the surface. Zinc can possibly form other speciation depending on combustion condition. Zinc chlorides (ZnCl2 and/or K2ZnCl4) and Zn spinels (ZnAl2O4 and ZnFe2O4) are not trapped in Al/Ca/Si-based matrix, however, adsorbed on the surface together with KCl/NaCl-based aggregates. Because metal oxides basically combine with and/or are trapped in Al/Ca/Si-based matrix, metal leachability might be controlled by not only metal oxide leachability but also leachability of Al/Ca/Si-based matrix around metal oxides.",

keywords = "Correlation analysis, Fly ash, Metal speciation, Municipal solid waste, SEM–EDX",

author = "Hiroki Kitamura and Dahlan, {Astryd Viandila} and Yu Tian and Takayuki Shimaoka and Takashi Yamamoto and Fumitake Takahashi",

note = "Funding Information: This study was supported financially by JSPS KAKENHI Grant Number 26550059, 15H04067, and 16J07285. The authors appreciate them greatly. Publisher Copyright: {\textcopyright} 2020, Springer Japan KK, part of Springer Nature.",

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AU - Shimaoka, Takayuki

AU - Yamamoto, Takashi

AU - Takahashi, Fumitake

N1 - Funding Information: This study was supported financially by JSPS KAKENHI Grant Number 26550059, 15H04067, and 16J07285. The authors appreciate them greatly. Publisher Copyright: © 2020, Springer Japan KK, part of Springer Nature.

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N2 - Micro-scale correlation analysis was applied to estimate metal speciation and the matrix in municipal solid waste incineration (MSWI) fly ash in this study. The results showed that dominant metal speciation and the bonding states with fly ash matrix are different in individual fly ash particle. Micro-scale correlation analysis also suggests metal behaviors in fly ash formation processes. Metal oxides likely react with and/or are trapped in Al/Ca/Si-based matrix such as aluminosilicate in the gas phase and then followed by KCl/NaCl adsorption on the surface. Zinc can possibly form other speciation depending on combustion condition. Zinc chlorides (ZnCl2 and/or K2ZnCl4) and Zn spinels (ZnAl2O4 and ZnFe2O4) are not trapped in Al/Ca/Si-based matrix, however, adsorbed on the surface together with KCl/NaCl-based aggregates. Because metal oxides basically combine with and/or are trapped in Al/Ca/Si-based matrix, metal leachability might be controlled by not only metal oxide leachability but also leachability of Al/Ca/Si-based matrix around metal oxides.

AB - Micro-scale correlation analysis was applied to estimate metal speciation and the matrix in municipal solid waste incineration (MSWI) fly ash in this study. The results showed that dominant metal speciation and the bonding states with fly ash matrix are different in individual fly ash particle. Micro-scale correlation analysis also suggests metal behaviors in fly ash formation processes. Metal oxides likely react with and/or are trapped in Al/Ca/Si-based matrix such as aluminosilicate in the gas phase and then followed by KCl/NaCl adsorption on the surface. Zinc can possibly form other speciation depending on combustion condition. Zinc chlorides (ZnCl2 and/or K2ZnCl4) and Zn spinels (ZnAl2O4 and ZnFe2O4) are not trapped in Al/Ca/Si-based matrix, however, adsorbed on the surface together with KCl/NaCl-based aggregates. Because metal oxides basically combine with and/or are trapped in Al/Ca/Si-based matrix, metal leachability might be controlled by not only metal oxide leachability but also leachability of Al/Ca/Si-based matrix around metal oxides.

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