Characterization of fly ash by ED-XRF and INAA for the synthesis of low silica zeolites

Kumar, Mithun; Senthilvadivu, R.; Rao, J. S. Brahmaji; Neelamegam, M.; Kumar, Gokhlesh; Kumar, R.; Jena, Hrudananda

doi:10.1007/s10967-020-07243-0

Cited by 8 publications

(8 citation statements)

References 18 publications

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“…1 shows the XRD pattern of fly ash, which indicates that the mineral phase of fly ash mainly consists of sillimanite, quartz and mullite. The presence of quartz and mullite in fly ash are reported by [12,14,25,39,40] and the presence of sillimanite. The presence of mullite in the sample shows that the combustion temperature in the boiler exceeded 1100 °C [41] and the broad hump between 20 ° and 30 ° of the fly ash is mainly due to the presence of amorphous silica [12].…”

Section: X-ray Diffraction (Xrd) Analysismentioning

confidence: 97%

“…The presence of quartz and mullite in fly ash are reported by [12,14,25,39,40] and the presence of sillimanite. The presence of mullite in the sample shows that the combustion temperature in the boiler exceeded 1100 °C [41] and the broad hump between 20 ° and 30 ° of the fly ash is mainly due to the presence of amorphous silica [12]. Though the crystalline phase is not abundant, the present of quartz and mullite indicates the abundant of Si and Al in the coal fly ash [42].…”

Section: X-ray Diffraction (Xrd) Analysismentioning

confidence: 97%

“…Fly ash is alkaline, abrasive [8], mainly composed of finegrained [9,1] and spheres or hollow spheres with a diameter of 1-100 µm [10,1] composed of spherical aluminosilicate glass particles, formed as a result of burning coal to 1200-1700 °C in thermal power plants [1,11] and collected by electrostatic precipitators from the flue gases in thermal power plants [12]. The color depends on the mineral composition of coal source, it may have a dark, gray or black color [13].…”

Section: Introductionmentioning

confidence: 99%

“…A large amount of fly ash is idle or abandoned, resulting in severe environmental and ecological problems [4,19] and has become one of the largest sources of industrial solid waste [20]. The fly ash cases a series of problems such as water pollution, air pollution, land pollution and health effect [3,4,16,20,21,22], with ecological risk due to the infiltration and accumulation of toxic elements in the soil such as Se, As, B, V, Al, Pb, Hg, Cr [1, 8,12,23]. In addition to above causes serious health hazards by inhalation of fine particulate matter, influencing the DNA repair mechanism due to PAHs (polycyclic aromatic hydrocarbons) derived from unburnt organic matter.…”

Section: Introductionmentioning

confidence: 99%

“…In addition to above causes serious health hazards by inhalation of fine particulate matter, influencing the DNA repair mechanism due to PAHs (polycyclic aromatic hydrocarbons) derived from unburnt organic matter. Small particles from coal-fired power plants and storage sites can reach the brain indirectly through the lungs and bloodstream or directly through the olfactory bulb causing neurobehavioral symptoms [12], in addition to being considered a human carcinogen [17].…”

Section: Introductionmentioning

confidence: 99%

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Structural, Morphological and Physical Characterization of Carbon Fly Ash

Parra¹,

Carvajal

Cuaspud

2023

Orbital: Electron. J. Chem.

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Carbon fly ash (CFA) is the principal industrial waste byproduct from the burning fossil fuel (coal combustion) for the thermal generation of electricity. CFA is a gray or black powdery solid that is constituted mostly metal oxides (Al, Si Fe and Ca), unburned carbon (UC) and other inorganic substance. The management of fly ash has thus been a matter of concern given the requirement of the large area of land for its disposal and potential of causing pollution of air, water, land and effects on human health. Physical and chemical characteristics of fly ash is important, as these characteristics influence its subsequent use and disposal. X-ray diffraction, and fluorescence, scanning microscopy with an energy dispersive spectroscopy, FTIR, BET was the common techniques employed to characterize FA. Characterization by XRD analysis identified the presence of quartz, mullite and sillimanite phases; while the FTIR results allowed the identification of vibrational bands, characteristic of Si-O-Si and Si-O bonds. The EDS analysis coupled to SEM allowed verifying that the composition of the samples is consistent with the results sought and that the morphological characteristics validate the proposed methodology. Surface area analyses (BET) showed that the fly ash possess an active area of 6.02 m2 · g-1.

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Section: X-ray Diffraction (Xrd) Analysismentioning

confidence: 97%

Section: X-ray Diffraction (Xrd) Analysismentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Structural, Morphological and Physical Characterization of Carbon Fly Ash

Parra¹,

Carvajal

Cuaspud

2023

Orbital: Electron. J. Chem.

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Physicochemical Simulation of the Melting Process of Silicon-Containing Waste from the Energy Complex

Grushko

Бычинский

Чудненко

2021

JOM

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Sintered Bottom and Vitrified Silica Ashes Derived from Incinerated Municipal Solid Waste as Circular Economy-Friendly Partial Replacements for Cement in Mortars

Wijesekara,

Sargent,

Hughes

et al. 2023

Waste Biomass Valor

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Sintered bottom ash (SBA) and vitrified ash (VA) derived from the incineration of municipal solid waste (MSW) at 1200 °C were used in this study as replacements for Type 2 Portland cement (CEM-II) based mortars. This approach negates the need to send them to landfill, benefits the circular economy and contributes towards the decarbonisation of cementitious construction materials in response to international net zero carbon emission agendas. The material (physico-chemical) characteristics of VA and SBA were analysed before being used as partial replacements for CEM-II in mortars, whereby compressive strength (CS) was the primary criterion for assessing engineering performance. VA and SBA replaced CEM-II at dosages of 10%, 25% and 50% based on their high inorganic and pozzolanic contents; whereby the 10% and 25% replacements did not compromise mortar strength. The alkalinity and pozzolanic properties of SBA collectively indicated it has greater potential as a cementitious material over VA, which possessed a neutral pH. The 28-day CS recorded for mixtures containing 25% VA and 10% SBA were 13.74 MPa and 11.77 MPa, respectively compared with 17.06 MPa for CEM-II control samples. The use of 2% additional water in 25% SBA mortar designs improved strength further, indicating that SBA’s water retention properties permitted further hydration and strength development with curing. Microstructural, mineralogical and infrared spectroscopy analyses indicated that these strengths were owed to the formation of silicate-based hydration products. The outcomes from this study highlight that SBA has potential for replacing CEM-II and VA as a filler in cementitious mortar. Graphical Abstract

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Characterization of fly ash by ED-XRF and INAA for the synthesis of low silica zeolites

Cited by 8 publications

References 18 publications

Structural, Morphological and Physical Characterization of Carbon Fly Ash

Structural, Morphological and Physical Characterization of Carbon Fly Ash

Physicochemical Simulation of the Melting Process of Silicon-Containing Waste from the Energy Complex

Sintered Bottom and Vitrified Silica Ashes Derived from Incinerated Municipal Solid Waste as Circular Economy-Friendly Partial Replacements for Cement in Mortars

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