Articles with "coal ash" as a keyword



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The Effect of Dietary Exposure to Coal Ash Contaminants Within Food Ration on Growth and Reproduction in Daphnia magna.

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Published in 2020 at "Environmental toxicology and chemistry"

DOI: 10.1002/etc.4819

Abstract: Coal ash contains numerous contaminants and is the focus of regulatory actions and risk assessments due to environmental spills. We exposed Daphnia magna to a gradient of coal ash contamination under high and low food… read more here.

Keywords: daphnia magna; coal ash; growth reproduction; coal ... See more keywords
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A Critical Evaluation of the Suction and Swelling Characteristics of Sand–Bentonite–Coal Ash Mixes

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Published in 2019 at "Geotechnical and Geological Engineering"

DOI: 10.1007/s10706-019-00902-4

Abstract: In recent times, compacted bentonite–sand/coal ash mixtures have been suggested as backfilling materials for waste disposal systems. These soil mixes containing mineral montmorillonite from the varying percentage of bentonite may exhibit swell/shrink behaviour with fluctuating… read more here.

Keywords: coal; swelling characteristics; sand bentonite; coal ash ... See more keywords
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Rehabilitation effect of the combined application of bamboo biochar and coal ash on ion-adsorption-type rare earth tailings

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Published in 2020 at "Journal of Soils and Sediments"

DOI: 10.1007/s11368-020-02670-8

Abstract: The massive mining of ion-adsorption-type rare earth ore has led to a series of problems such as soil acidification, land degradation, and water pollution, and thus, an effective method of treating rare earth tailings is… read more here.

Keywords: adsorption type; rare earth; ion adsorption; coal ash ... See more keywords
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Fireside Corrosion Behaviors of Super304H and HR3C in Coal Ash/Gas Environment with Different SO2 Contents at 650 °C

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Published in 2018 at "Journal of Materials Engineering and Performance"

DOI: 10.1007/s11665-017-3051-6

Abstract: The corrosion behaviors of Super304H and HR3C used for USC boiler applications were investigated in simulated coal ash/gas environments with 0.1 and 1.5% of SO2 at 650 °C for 500 h. The results indicated that the increase… read more here.

Keywords: so2; behaviors super304h; coal ash; super304h hr3c ... See more keywords
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Thermodynamic Modelling of Effect of Flux on the Liquidus Temperatures and Phase transitions in Coal Ash

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Published in 2020 at "Journal of the Geological Society of India"

DOI: 10.1007/s12594-020-1508-y

Abstract: Plant shutdowns due to the accumulation of ash materials in the boilers is a commonly practiced problem in thermal power sectors. Cleaning of ash products at regular intervals need to be necessary for maintaining the… read more here.

Keywords: effect flux; coal ash; temperature; ash ... See more keywords
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Influence of coal ash on potassium retention and ash melting characteristics during gasification of corn stalk coke.

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Published in 2018 at "Bioresource technology"

DOI: 10.1016/j.biortech.2018.09.053

Abstract: This study experimentally investigated the potassium fixation ability and ash fusion characteristics during the gasification of corn stalk coke blended with coal ash in CO2 atmosphere. The ash samples were analyzed by X-ray diffraction (XRD)… read more here.

Keywords: potassium; coal ash; ash; retention ... See more keywords
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Environmental damage caused by coal combustion residue disposal: A critical review of risk assessment methodologies.

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Published in 2022 at "Chemosphere"

DOI: 10.1016/j.chemosphere.2022.134410

Abstract: Coal combustion generates almost 40% of world's electricity. However, it also produces 1.1 billion tons of coal combustion residues (CCR) annually, half of which end up in landfills. Although current regulations require proper lining and… read more here.

Keywords: coal ash; coal combustion; coal; risk assessment ... See more keywords
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Rare earth elements and yttrium in coal ash from the Luzhou power plant in Sichuan, Southwest China: Concentration, characterization and optimized extraction

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Published in 2019 at "International Journal of Coal Geology"

DOI: 10.1016/j.coal.2019.01.001

Abstract: Abstract Coal ash is considered as a promising alternative resource for rare earth elements and yttrium (REE + Y or REY) recovery. Coal ash samples (fly ash and bottom ash), as well as corresponding feed coals, collected… read more here.

Keywords: rare earth; china; coal ash; ash ... See more keywords
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CO2 capture on aminosilane functionalized alumina-extracted residue of catalytic gasification coal ash

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Published in 2020 at "Energy"

DOI: 10.1016/j.energy.2020.119642

Abstract: ABSTRACT The technology of alumina-extraction from coal ash provides an effective way for re-utilization of coal based solid waste as resource. However, one of the most serious challenges that this technology face is the harmless… read more here.

Keywords: alumina extracted; coal ash; extracted residue; co2 ... See more keywords
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Sintering and collapse of synthetic coal ash and slag cones as observed through constant heating rate optical dilatometry

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Published in 2019 at "Fuel"

DOI: 10.1016/j.fuel.2018.08.055

Abstract: Abstract Ash agglomeration and slagging are responsible for costly maintenance problems in coal-fired boilers. Boiler design and operation rely on critical ash fusion temperatures defined by geometric criteria that explicitly ignore shrinkage or warping. Reproducibility… read more here.

Keywords: collapse; temperature; optical dilatometry; coal ash ... See more keywords
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Effect of K2O/Na2O on fusion behavior of coal ash with high silicon and aluminum level

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Published in 2020 at "Fuel"

DOI: 10.1016/j.fuel.2019.116964

Abstract: Abstract Ash fusion temperatures (AFTs) are widely used for evaluation of fusibility of coal ash for combustion and gasification. K2O and Na2O is regarded as the effective component to enhance the ash fusibility for slag… read more here.

Keywords: fusion; k2o na2o; effect k2o; coal ash ... See more keywords