Fly ash–airborne particles from Ptolemais–Kozani area, northern Greece, as determined by ESEM-EDX

Iordanidis, Andreas; Buckman, Jim; Triantafyllou, A. G.; Asvesta, Argyro

doi:10.1016/j.coal.2007.02.007

Cited by 49 publications

(26 citation statements)

References 33 publications

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“…Fine-sized fly ash is more persistently available in the atmosphere than coarse fly ash and may cause respiratory illnesses such as asthma, pneumonia and heart diseases (Reynolds et al, 2003;Iordanidis et al, 2008;Harris and Davidson, 2009;Ruhl et al, 2009;Zhang et al, 2012). Particle size distribution of fly ash was measured by a Laser diffraction particle size analyzer.…”

Section: Particle Size Distribution Of the Fly Ashmentioning

confidence: 99%

Content and Distribution of Trace Elements and Polycyclic Aromatic Hydrocarbons in Fly Ash from a Coal-Fired CHP Plant

Liu

Cao

2014

Aerosol Air Qual. Res.

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The levels of trace elements and polycyclic aromatic hydrocarbons (PAHs) in fly ash generated by coal combustion have received considerable attention in recent years, due to their potential environmental impact. Sixteen high priority PAHs and 14 trace elements in coal fly ash were measured. The particle sizes of fly ash showed a bimodal distribution, and most ash particles were within a range of 20-25 µm in diameter. The fly ash exhibited high contents of CaO and SO 3 , which was influenced by the desulfidation treatment of limestone. The Be, Cu, Ni, V, Se, Mo and Cd contents increased significantly with decreasing particle sizes of fly ash, while those of Zn and Pb showed no obvious trends. PAHs with three-and four-rings were the dominate species in all the fly ash. The amount low molecular weight PAHs with two-, three-and four-rings was inversely correlated with the particle sizes of the fly ash.

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Section: Particle Size Distribution Of the Fly Ashmentioning

confidence: 99%

Content and Distribution of Trace Elements and Polycyclic Aromatic Hydrocarbons in Fly Ash from a Coal-Fired CHP Plant

Liu

Cao

2014

Aerosol Air Qual. Res.

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“…1,2 Being generated from various constituents in the coals, fly ash is a complex mixture of inorganic and organic compounds having heterogeneous physicochemical properties. Fly ash is composed of particles of various sizes ranging from less than nanometers up to a few micrometers.…”

Section: Introductionmentioning

confidence: 99%

“…2 There have been reports on the relationship between the particle size of the fly ash and its chemical composition. [2][3][4]11,[13][14][15][16][17][18][19][20][21][22][23] Generally the metal content tends to increase as the particle size decreases. This dependency is prominent for particles smaller than 50 m and for the more volatile metals such as Pb, Cu, Cd, As, Zn, etc.…”

Section: Introductionmentioning

confidence: 99%

“…[10][11][12] Most thermoelectric power stations are now equipped with electrostatic precipitators to reduce emission of fly ash. 2 There have been reports on the relationship between the particle size of the fly ash and its chemical composition. [2][3][4]11,[13][14][15][16][17][18][19][20][21][22][23] Generally the metal content tends to increase as the particle size decreases.…”

Section: Introductionmentioning

confidence: 99%

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Characterization of Fly Ash by Field-Flow Fractionation Combined with SPLITT Fractionation and Compositional Analysis by ICP-OES

Kang¹,

Eum²,

Lee³

2014

Bulletin of the Korean Chemical Society

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Accurate analysis of fly ash particles is not trivial because of complex nature in physical and chemical properties. SPLITT fractionation (SF) was employed to fractionate the fly ash particles into subpopulations in large quantities. Then the SF-fractions were analyzed by the steric mode of sedimentation field-flow fractionation (Sd/StFFF) for size analysis. The SF-fractions were also analyzed by ICP-OES. The results showed that the fly ash is mainly composed of Fe, Ca, Mg and Mn. No particular trends were observed between the particle size and the concentrations of Fe, Ca, Mg, while Mn, Cu and Zn were in higher concentrations in smaller particles. Sample preparation procedures were established, where the fly ash particles were sieved to remove large contaminants, and then washed with acetone to remove organics on the surface of particles. The sample preparation and analysis methods developed in this study could be applied to other environmental particles.

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“…Therefore, the morphology of individual fly ash particles has a considerable effect on the overall chemical composition of the fly ash [10]. Morphologically, fly ash is composed of inorganics and incompletely combusted and/or non-combustible ingredients of spherical, hollow spherical, porous, angular, irregular or slaggy shapes [11,12]. The high burnout temperatures achieved during the combustion process in conventional coal power stations strongly influence the morphology and chemical composition of fly ash [13].…”

Section: Introductionmentioning

confidence: 99%

Determining the Role of Individual Fly Ash Particles in Influencing the Variation in the Overall Physical, Morphological, and Chemical Properties of Fly Ash

et al. 2016

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Abstract. The properties of fly ashes vary because of the differences in the properties of their individual particles, and the determination of variation in these properties is of interest to the industries which use pulverized raw fly ash in applications, such as in cementitious materials and in the recovery of certain rare elements from raw fly ash. To investigate the differences in individual particles, four pulverized raw fly ashes from thermal power plants of the Czech Republic were used in this research. It was observed from FE-SEM that all four fly ashes consist of glassy hollow spherical, solid spherical, porous spherical, bright spherical, porous slaggy and compact slaggy particles. Box and whisker diagrams were plotted from the data of EDX individual particle analyses, which showed that the data of percentages for the Si, Al, and Fe elements is more scattered as compared to other elements. It was further observed from ternary phase diagrams and pseudo coloured images, that nature of fly ash particles changes from alumino silicate glassy to alumino silicate calcite metallic to pure ferro-metallic, where glassy particles showed high percentages and pure calcite particles were absent in fly ashes. Furthermore, a comparison between the XRF, the EDX total area analyses, showed that the EDX individual particle analysis gives more realistic and reliable data with median, mean, and the standard deviation for percentages of each element present in the fly ashes.

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Fly ash–airborne particles from Ptolemais–Kozani area, northern Greece, as determined by ESEM-EDX

Cited by 49 publications

References 33 publications

Content and Distribution of Trace Elements and Polycyclic Aromatic Hydrocarbons in Fly Ash from a Coal-Fired CHP Plant

Content and Distribution of Trace Elements and Polycyclic Aromatic Hydrocarbons in Fly Ash from a Coal-Fired CHP Plant

Characterization of Fly Ash by Field-Flow Fractionation Combined with SPLITT Fractionation and Compositional Analysis by ICP-OES

Determining the Role of Individual Fly Ash Particles in Influencing the Variation in the Overall Physical, Morphological, and Chemical Properties of Fly Ash

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