Characterization and comparison of leaching behaviors of fly ash samples from three different power plants in Turkey

Yılmaz, Hatice

doi:10.1016/j.fuproc.2015.04.011

Cited by 39 publications

(11 citation statements)

References 52 publications

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“…The results are in agreement with Chung and Smith [20], they observed XRD pattern of the clinker type bottom ashes as much more crystalline than fly ash sample, but both contains many of the same crystalline phases. Ouartz (SiO2) is the major crystalline phase in the PP-1 and it is in accordance with high SiO 2 content as per chemical composition, similar observation was reported by Yılmaz [21].…”

Section: Mineralogy Analysissupporting

confidence: 87%

Environmental Impact and Physicochemical Assessment of Pond Ash for its Potential Application as a Fill Material

Suthar

Aggarwal

2016

Int. J. of Geosynth. and Ground Eng.

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Thermal power plants (TPPs) produce a large quantity of coal ash, whose disposal is a big environmental issue. A major portion of coal ash is dumped as pond ash in ash pond near TPPs. Properties of pond ash vary from TPP to TPP and also within the same ash pond at inflow and outflow point. To assess the feasibility of pond ash as a fill material, pond ash samples were collected from inflow and outflow points of three TPPs in Haryana. This paper presents a detailed characterization study on the physicochemical, mineralogical and morphological properties of pond ash samples. Leaching study was also carried out to assess the potential contamination of ground water from coal ash fills. Results reveal that all inflow and outflow pond ashes have low specific gravity (2.03-2.27) as compared to soil (2.6-2.7), i.e. natural fill material, low amount of unburned carbon content (1.79-3.49 %) and the values of maximum dry density and optimum moisture content are within the permissible limits as per design standards of embankment construction. The results of leaching study indicate that concentration of lead (Pb) and chromium (Cr) are quite high from standard land disposal limit, prescribed by Ministry of Environment and Forest in all pond ash samples. So it can be effectively used as construction fill materials for low-lying areas and as embankment materials etc., with caution to protect ground water from contamination due to the high concentration of lead (Pb) and chromium (Cr).

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Section: Mineralogy Analysissupporting

confidence: 87%

Environmental Impact and Physicochemical Assessment of Pond Ash for its Potential Application as a Fill Material

Suthar

Aggarwal

2016

Int. J. of Geosynth. and Ground Eng.

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“…The leaching behaviour of some heavy metals from various types of coal fly ashes has been discussed by some researchers [3][4][5][6][7]. These studies indicated that the leaching characteristics of each metal are different and that the alkalinity of the leaching solution plays an important role.…”

Section: Introductionmentioning

confidence: 99%

Preliminary Study on Additives for Controlling As, Se, B, and F Leaching from Coal Fly Ash

et al. 2018

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The application of paper sludge ash as an additive in controlling the leaching of trace elements has been satisfactorily effective to date. Previous studies have found that paper sludge ash has a promising effect in controlling the leaching of arsenic, selenium and boron. The content of calcium oxide in paper sludge ash is believed to be one of the important factors in decreasing the concentration of trace elements in leachate. Therefore, this study aimed to verify the effect of paper sludge ash in the leaching process and to propose an effective and applicable suppressing material that can control the leaching of As, Se, B and F simultaneously. In light of this aim, Ca(OH)2, PS ash 8 and blast furnace cement (BF cement) were tested as single and mixed additives in two different coal fly ashes (FA C and FA H). The results indicate that the application of a mixture of additives is necessary to control the leaching of trace elements. A mixture of PS ash 8, Ca(OH)2 and blast furnace cement (BF cement) was proposed to be an applicable and suitable additive that could suppress arsenic, selenium, boron, and fluorine leaching simultaneously.

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“…Under favorable geochemical conditions, a significant portion of these potentially toxic HMs can easily be leached out from the CCRs particles by the interaction with water compartments (e.g., pond water). The watersoluble HMs can pollute the soil and the aquatic system (including both surface and groundwater) (Shreya et al 2015;Yılmaz 2015;Li et al 2012a;Medina et al 2010;Depoi et al 2008;Moreno et al 2005). Metal contaminants, e.g., Pb, V, Cd, Cr, and Ni are potentially hazardous to the environmental systems even at low concentrations (Yao et al 2015).…”

Section: Inorganic Contaminantsmentioning

confidence: 99%

Environmental Impacts of Coal-Mining and Coal-Fired Power-Plant Activities in a Developing Country with Global Context

Habib¹,

Khan

2021

Environmental Challenges and Solutions

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To represent a comprehensive scenario regarding the coal mining and coal-fired power plant activities in a developing country (Bangladesh) and to understand the total environmental impacts, potential coal resources of Bangladesh, environmental geochemistry and dispersion of pollutants, eco-toxicological impacts, human health risks as well as socioeconomic impacts are evaluated in this chapter. Potential coal reserves along with the future plants are estimated. Technogenic sources of environmental pollutants including environmentally toxic heavy metals, health hazardous radionuclides, persistent organic pollutants, suspended particulate maters, etc. are assessed. In doing so, scarce associated data from coal mine (Barapukuria, Bangladesh) and Barapukuria coal-fired power plant (BTPP) of Bangladesh have been reconciled by using and arguing the previous works around the globe. Immense and proper literature reviews as well as the existing data on Barapukuria coal mine and BTPP are tabulated to compare and understand the condition along with the potential prevention and remediation approaches.

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Characterization and comparison of leaching behaviors of fly ash samples from three different power plants in Turkey

Cited by 39 publications

References 52 publications

Environmental Impact and Physicochemical Assessment of Pond Ash for its Potential Application as a Fill Material

Environmental Impact and Physicochemical Assessment of Pond Ash for its Potential Application as a Fill Material

Preliminary Study on Additives for Controlling As, Se, B, and F Leaching from Coal Fly Ash

Environmental Impacts of Coal-Mining and Coal-Fired Power-Plant Activities in a Developing Country with Global Context

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