Preparation and characterization of amorphous aluminosilicate polymers from ash formed in combustion of peat and wood mixtures

Tyni, Sanna; Karppinen, JI; Tiainen, Minna S.; Laitinen, Risto S.

doi:10.1016/j.jnoncrysol.2013.12.032

Cited by 16 publications

(4 citation statements)

References 28 publications

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“…To date, alkali activation of REF FA has not been studied. Fly ash from fluidized bed-combustion of coal has been studied recently, and promising results have been obtained with other binding materials (Chindaprasirt et al, 2011;Li et al, 2012a;Liu et al, 2014;Slavik et al, 2008;Tyni et al, 2014;Xu et al, 2010). However, S/S of FBB FA by alkali activation has not been studied.…”

Section: Introductionmentioning

confidence: 99%

Alkali activation of recovered fuel–biofuel fly ash from fluidised-bed combustion: Stabilisation/solidification of heavy metals

et al. 2015

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Section: Introductionmentioning

confidence: 99%

Alkali activation of recovered fuel–biofuel fly ash from fluidised-bed combustion: Stabilisation/solidification of heavy metals

et al. 2015

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“…The samples were selected by the degree of the decomposition, so a more detailed analysis can be registered. For XRD analyses, the samples were manually homogenized in an agate mortar to obtain the optimal particle size and to ensure the random orientation of the crystals in the samples (Tyni et al, 2014). XRD measurements were performed using x-ray diffractometer (Shimadzu LabX XRD-6000; Cu-Κα radiation λ = 1.5406 Å), operating at 40 kV, with a beam current of 30 mA.…”

Section: Methodsmentioning

confidence: 99%

Spatial distribution and geochemistry of major and trace elements from Mohoș peatland, Harghita Mountains, Romania

et al. 2018

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The Mohoș peatland is used as environmental archives of deposition for major (Al, Ca, Mg, Fe, and Mn) and minor elements (Cr, Cu, Ni, Pb, Sr, and Zn). The intense mining activity of Cu-rich pyrite and polymetallic sulfide ore from Bălan districts during the past centuries with a strong pollution impact was the reason why the Mohoș peatland, located in the vicinity of a mining area, was selected for this study. The mineralogical and chemical compositions of the peat have been determined by inductively coupled plasma optical emission spectrometry (ICP-OES), scanning electron microscopy (SEM), and x-ray diffraction (XRD). The identification of the main processes affecting the concentrations of the elements in peat was statistically evaluated by principal component analysis (PCA), and the identification of the main groups was determined by hierarchical clustering analysis (HCA). Our results revealed that the source of chemical and mineralogical peat samples is mainly geogenic with most of the elements being accumulated following the disintegration of parental material and through volcanic activity. For Pb, Zn, Ni, Al, and Sr, the concentrations were influenced by both natural processes and anthropogenic activities, such as mining, burning of fossil fuels, traffic activities, and metallurgy. Copper was influenced by anthropogenic activities. The distribution maps of trace elements were built only for the area in which the samples were taken.

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“…The possibility to use fly and bottom ash as raw materials for geopolymers has been studied by several authors. 7–9 The typical SiO 2 /Al 2 O 3 ratio in the ash for producing good quality geopolymers has been determined to be between 3.3 and 4.5. 9 The potential use of biomass ash as filler in bituminous mixture has been recently investigated by Melotti et al 10 : biomass ash, if subjected to a sieving process, may be considered as a valid alternative to natural filler.…”

Section: Introductionmentioning

confidence: 99%

“…7–9 The typical SiO 2 /Al 2 O 3 ratio in the ash for producing good quality geopolymers has been determined to be between 3.3 and 4.5. 9 The potential use of biomass ash as filler in bituminous mixture has been recently investigated by Melotti et al 10 : biomass ash, if subjected to a sieving process, may be considered as a valid alternative to natural filler. Mortars produced by replacing natural sand with bottom bed ash (composed of sand, soil, small stones and unburnt biomass fraction) from forest biomass combustion showed similar properties of the standard ones.…”

Section: Introductionmentioning

confidence: 99%

Biomass ash as supplementary cementitious material (SCM)

Salvo

Rizzo

Caldirola

et al. 2015

Advances in Applied Ceramics

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This paper describes the research done in order to valorise the biomass ash and evaluate its use as supplementary cementitious material (SCM) in the cement industry. The biomass ash samples used in this study were collected from three different power plants. The characterisation of the ashes as SCMs was performed after two different valorisation processes: (i) a vitrification process in order to obtain a new material with high hydraulicity and (ii) an easy de-alkalisation process in order to reduce the alkali content. The results of this work show that biomass ash derived from the combustion of woodchips and straw, properly treated, is characterised by pozzolanic activity and latent hydraulicity that could be exploited for the manufacture of low embodied energy concrete. The ultimate strength of mortars prepared using vitrified biomass ash becomes higher than that of the parent Portland cement after 28 days.

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Preparation and characterization of amorphous aluminosilicate polymers from ash formed in combustion of peat and wood mixtures

Cited by 16 publications

References 28 publications

Alkali activation of recovered fuel–biofuel fly ash from fluidised-bed combustion: Stabilisation/solidification of heavy metals

Alkali activation of recovered fuel–biofuel fly ash from fluidised-bed combustion: Stabilisation/solidification of heavy metals

Spatial distribution and geochemistry of major and trace elements from Mohoș peatland, Harghita Mountains, Romania

Biomass ash as supplementary cementitious material (SCM)

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