X-ray photoelectron spectroscopy studies of coal fly ashes with emphasis on depth profiling of submicrometer particle size fractions

Kaufherr, N.; Shenasa, Mohsen; Lichtman, David

doi:10.1021/es00137a005

Cited by 16 publications

(5 citation statements)

References 17 publications

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“…Additionally, Pb+ and ZnOH+ behaved similarly relative to K+, Na+, Ca+, and Al+ (Figure 7b). Evidence of surface enrichment on discrete coal ESP ash has been provided (25,26,30,33). The results presented here suggest enrichment of these elements in the polycrystalline aggregates external to the spherical particles.…”

Section: Resultsmentioning

confidence: 51%

Comprehensive Approach toward Understanding Element Speciation and Leaching Behavior in Municipal Solid Waste Incineration Electrostatic Precipitator Ash

Eighmy¹,

Eusden²,

Krzanowski³

et al. 1995

Environ. Sci. Technol.

256

157

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Section: Resultsmentioning

confidence: 51%

Comprehensive Approach toward Understanding Element Speciation and Leaching Behavior in Municipal Solid Waste Incineration Electrostatic Precipitator Ash

Eighmy¹,

Eusden²,

Krzanowski³

et al. 1995

Environ. Sci. Technol.

256

157

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“…The phases present in fly ash particles were identified by X-ray diffraction. [11][12][13][14][15] These are quartz, mullite, lime, spinel, hematite, and ferrite. Some of the constituents may be partly amorphous.…”

Section: Introductionmentioning

confidence: 99%

Chemical reactions between aluminum and fly ash during synthesis and reheating of Al-fly ash composite

Guo

Rohatgi

1998

Metall Mater Trans B

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Thermodynamic analysis indicates that there is the possibility of chemical reactions between aluminum melt and cenosphere fly ash particles. These particles contain alumina, silica, and iron oxide, which, during solidification processing of aluminum-fly ash composites or during holding of such composites at temperatures above the melting temperature of aluminum, are likely to undergo chemical reduction. These chemical reactions between the fly ash and molten aluminum have been studied by metallographic examination, differential thermal analysis (DTA), scanning electron microscopy (SEM), energy-dispersive X-ray analysis (EDX) and X-ray analysis after holding the aluminum-fly ash composites for different periods above the liquidus temperature. The experiments indicate that there is progressive reduction of silica and mullite in the fly ash, and formation of alumina with holding time of composites at a temperature of 850 ЊC. The walls of the cenosphere fly ash particles progressively disintegrate into discrete particles as the reaction progresses. The rate of chemical reaction was high at the start of holding the composite at a temperature of 850 ЊC, and then the rate significantly decreased with time. The reaction was almost complete after 10 hours.

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“…This material contains or adsorbs chemical species evolved in coal combustion, including a variety of transition metals at the microgram per gram level (22). Silicon makes up over 20% (w/w) of the sample mass and A1 another 13%, accounting for most of the mass as aluminosilicates (23). Other elements present in excess of 1% include C, Fe, Ca, K, and Mg.…”

Section: Resultsmentioning

confidence: 99%

Direct analysis of solids by graphite furnace atomic absorption spectrometry using a second surface atomizer

Rettberg¹,

Holcombe²

1986

Anal. Chem.

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X-ray photoelectron spectroscopy studies of coal fly ashes with emphasis on depth profiling of submicrometer particle size fractions

Cited by 16 publications

References 17 publications

Comprehensive Approach toward Understanding Element Speciation and Leaching Behavior in Municipal Solid Waste Incineration Electrostatic Precipitator Ash

Comprehensive Approach toward Understanding Element Speciation and Leaching Behavior in Municipal Solid Waste Incineration Electrostatic Precipitator Ash

Chemical reactions between aluminum and fly ash during synthesis and reheating of Al-fly ash composite

Direct analysis of solids by graphite furnace atomic absorption spectrometry using a second surface atomizer

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