Metal Behavior during Vitrification of Municipal Solid Waste Incinerator Fly Ash

Kuo, Yi‐Ming; Huang, Kuo‐Lin; Lin, Chitsan

doi:10.4209/aaqr.2011.12.0231

Cited by 16 publications

(6 citation statements)

References 24 publications

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“…Wey (2006) revealed that the water-washing process could change the speciation of Cu and Pb and inhibit their emission during thermal treatment. In the present study, the volatilization ratio of Cr in the fly ash and froths was close because of high boiling points (Kuo et al, 2012). At temperatures lower than 900°C, almost no volatilization was observed, and the volatilization rates were approximately 10% at ≥ 1200°C, indicating that the flotation process had almost no effect on the volatilization of Cr.…”

Section: Effect Of Flotation On the Phase Distribution And Volatilizamentioning

confidence: 68%

Reburning Treatment of the Froths Obtained after the Flotation of Incinerator Fly Ash

Wei

Liu²,

Liu

et al. 2017

Aerosol Air Qual. Res.

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Flotation has been proven to successfully remove most polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/Fs) and carbon constituents from hospital solid waste incinerator (HSWI) fly ash. The resultant froths contain large quantities of carbon constituents that can reburn in the incinerator. In this paper, the reburning behavior of froths at temperatures from 800°C to 1200°C was compared with that of HSWI fly ash. Results showed that the destruction efficiency of PCDD/Fs was higher in the froths than in the fly ash at the same reburning temperature. The destruction efficiencies of PCDD/Fs in the froths exceeded 98% at temperatures higher than 1000°C. The volatilization ratio of Pb, Zn, and Cu was lower in the froths than in the fly ash. Furthermore, reburning of the froths can achieve energy recovery of the carbon constituents. Therefore, flotation followed by reburning treatment in a combustion chamber could be a suitable process for the detoxification and reutilization of HSWI fly ash.

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Section: Effect Of Flotation On the Phase Distribution And Volatilizamentioning

confidence: 68%

Reburning Treatment of the Froths Obtained after the Flotation of Incinerator Fly Ash

Wei

Liu²,

Liu

et al. 2017

Aerosol Air Qual. Res.

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“…Composition corrections with more properly silica‐rich wastes or pure silica provide a simple and effective solution, with additional advantages, i.e. the possibility to extract low boiling point metals …”

Section: Inorganic Waste As Raw Materials For Glass‐based Productsmentioning

confidence: 99%

“…the possibility to extract low boiling point metals. 44,48 The high temperatures required by vitrification cause the destruction of many hazardous organic compounds, 2,3 but gaseous emissions still need attention, especially concerning the presence of chloride salts and volatile heavy metal oxides. 4 Chlorine has a very limited solubility in glasses 49 and may lead, if uncontrolled, to the formation of hazardous species in the cooling step and to the corrosion of equipments.…”

Section: Introductionmentioning

confidence: 99%

Recycling of inorganic waste in monolithic and cellular glass‐based materials for structural and functional applications

Rincón

Marangoni

Çetin

et al. 2016

J of Chemical Tech & Biotech

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The stabilization of inorganic waste of various nature and origin, in glasses, has been a key strategy for environmental protection for the last decades. When properly formulated, glasses may retain many inorganic contaminants permanently, but it must be acknowledged that some criticism remains, mainly concerning costs and energy use. As a consequence, the sustainability of vitrification largely relies on the conversion of waste glasses into new, usable and marketable glass‐based materials, in the form of monolithic and cellular glass‐ceramics. The effective conversion in turn depends on the simultaneous control of both starting materials and manufacturing processes. While silica‐rich waste favours the obtainment of glass, iron‐rich wastes affect the functionalities, influencing the porosity in cellular glass‐based materials as well as catalytic, magnetic, optical and electrical properties. Engineered formulations may lead to important reductions of processing times and temperatures, in the transformation of waste‐derived glasses into glass‐ceramics, or even bring interesting shortcuts. Direct sintering of wastes, combined with recycled glasses, as an example, has been proven as a valid low‐cost alternative for glass‐ceramic manufacturing, for wastes with limited hazardousness. The present paper is aimed at providing an up‐to‐date overview of the correlation between formulations, manufacturing technologies and properties of most recent waste‐derived, glass‐based materials. © 2016 The Authors. Journal of Chemical Technology & Biotechnology published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.

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“…These studies independently conclude that the metals with low boiling points in MSWI bottom ash evaporated in the vitrification process, producing a slag with greatly reduced concentrations of such metals (Ecke et al, 2001; Katou et al, 2001; Kuo et al, 2012). Furthermore, Ecke et al (2001) and Kuo et al (2010) concluded that the release of toxic metals from slag produced from vitrification of MSWI bottom ash was significantly lower than that of untreated MSWI ash (Ecke et al, 2001; Kuo et al, 2012).…”

Section: Introductionmentioning

confidence: 97%

Comparison of trace element mobility from MSWI ash before and after plasma vitrification

et al. 2021

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A common perception of plasma arc treatment systems for municipal solid waste incineration ash is that the resulting vitrified slag is inert from an environmental perspective. Research was conducted to examine this hypothesis and to assess whether reduced pollutant release results from pollutant depletion during the process of the ash with plasma, or encapsulation in the glassy vitrified matrix. The concentrations of four discrete municipal solid waste incineration ash samples before and after plasma arc vitrification in a bench-scale unit were compared. Slag and untreated ash samples were leached using several standardized approaches and mobility among the four metals of interest (e.g. As, Cd, Pb and Sb) varied across samples, but was generally high (as high as 100% for Cd). Comparison across methods did not indicate substantial encapsulation in the vitrified slag, which suggests that reduced pollutant release from plasma arc vitrified slag is due to pollutant depletion by volatilization, not encapsulation. This has significant implications for the management of air pollution control residues from waste-to-energy facilities using plasma arc vitrification.

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Metal Behavior during Vitrification of Municipal Solid Waste Incinerator Fly Ash

Cited by 16 publications

References 24 publications

Reburning Treatment of the Froths Obtained after the Flotation of Incinerator Fly Ash

Reburning Treatment of the Froths Obtained after the Flotation of Incinerator Fly Ash

Recycling of inorganic waste in monolithic and cellular glass‐based materials for structural and functional applications

Comparison of trace element mobility from MSWI ash before and after plasma vitrification

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