Assessment of Heavy Metals Inactivation in Contaminated Soil by Coal Fly and Bottom Ashes

Diatta, Jean; Fojcik, Edward; Drobek, Leszek; Spiżewski, T.; Krzesiński, W.

doi:10.1515/mipo-2017-0016

Cited by 4 publications

(4 citation statements)

References 33 publications

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“…Both ions in higher concentrations may exert a harmful effect on plant sprouting and growth. Excessive amounts of SO 4 2− and Cl − ions lead to soil acidification (increasing the concentrations of H + ions), raising the availability of trace elements and phytotoxic ones (heavy metals) [30]. The process may be reported according to Equation (2):…”

Section: Chemical Characteristics Of Aqueous Leachates From Soil Subs...mentioning

confidence: 99%

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Development of Soil Substitutes for the Sustainable Land Reclamation of Coal Mine-Affected Areas

et al. 2022

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The main purpose of this paper was to outline a novel approach for the use of industrial by-products generated in coal mines and coal-fired power plants as the components for artificial soils. Several coal combustion by-products, coal mine waste and organic waste materials were tested at laboratory scale for use in the reclamation of areas degraded by coal mining activity. The role of artificial soils was the land rehabilitation of the high acidic waste heap. The results revealed that the amounts of organic matter (14.87–25.01%) and nutrients in the soil substitutes were sufficient to support plant growth, i.e., N (0.37–0.51%), P (0.23–0.47%), K (1.78–3.17%), Ca (4.93–8.39%) and Mg (1.16–1.71%). A phytotoxicity test using white mustard (Sinapis alba) seeds under laboratory conditions showed good germination results (56–66%) for three soil substitutes that did not contain fly ash from biomass combustion, compared to the reference soil (84%). The relationships established for the aqueous leachate parameters of soil substitutes vs. the Sinapis alba germination revealed negative correlations with electrical conductivity (r = −0.88), SO42− (r = −0.91) and Cl− (r = −0.70) ions; the two latter ones were responsible for the salinity which hampered the germination process of the soil substitutes. Moreover, quite similar correlations were obtained between the germination of Sinapis alba and the trace elements of the soil substitutes: Fe (r = −0.69), Cd (r = −0.72), Cu (r = −0.80), Pb (r = −0.78) and Zn (r = −0.74). However, negative and significant correlations in aqueous leachates were shown only with Ni concentration (r = −0.73). The relevance of these results for the effect of salinity on germination and the early growth of S. alba was discussed in detail and was confirmed with the Principal Component Analysis (PCA). The study proved that the physicochemical characteristic of recycled wastes exhibited their potential usefulness for the reclamation of affected areas such as mine waste heaps.

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Section: Chemical Characteristics Of Aqueous Leachates From Soil Subs...mentioning

confidence: 99%

“…Fly ash is composed of over 20% of lime and for that reason it can also neutralize soil acidity to a level suitable for agricultural crops [19]. Compared to the bottom ash, it displays better heavy metal inactivation in contaminated soil [30].…”

Section: Introductionmentioning

confidence: 99%

Development of Soil Substitutes for the Sustainable Land Reclamation of Coal Mine-Affected Areas

et al. 2022

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“…Large-scale utilization of pulverized coal in industrial power generation produces not only acidic pollutants (SO 2 and NO x ) but also significant amounts of combustion residues (wastes) or by-products such as pulverized coal ash and slag. , Currently, millions of tons of pulverized coal ash (bottom ash of approximately 20% and fly ash of approximately 80%) and slag are produced from more than 30 CFTPPs installed in Turkey. Depending on the efficiency of the electrostatic precipitators, most of the fly ash (approximately 99.5%) is collected, while the remainder is released into the atmosphere .…”

Section: Introductionmentioning

confidence: 99%

Assessment of the Enrichment of Heavy Metals in Coal and Its Combustion Residues

et al. 2022

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Coal-fired thermal power plants remain one of the main sources of electricity generation in Turkey. Combustion of coal creates coal ash and slag, which are often stored in landfills located near residential and agricultural fields, increasing the potential for high environmental contamination and health risks. This study investigates the content and enrichment factor (EF) of heavy metals in pulverized lignite coal and its combustion residues from the Kangal lignite coal-fired thermal power plant situated in the Central Anatolian Region of Turkey. The concentration of heavy metals (Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Sr, Zr, Cd, Hg, and Pb) in lignite coal, slag, and fly ash samples were analyzed using an energy dispersive X-ray fluorescence technique. The concentration of Fe is highest while Hg concentration is lowest in the samples. The concentrations of heavy metals are higher in slag and fly ash samples than in lignite coal. Average values of EF (related to Earth’s crust average) revealed that extreme enrichment has been shown by arsenic and mercury in lignite coal and fly ash samples while very high enrichment has been shown in slag samples.

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“…Fly ash is composed of over 20% of lime and for that reason it can also neutralize soil acidity to a level suitable for agricultural crops (Skousen et al , 2013). Compared to the bottom ash, it displays better heavy metals inactivation in contaminated soil (Diatta et al , 2016).…”

Section: Introductionmentioning

confidence: 99%

Industrial By-Products for the Rehabilitation of Coal Mining-Affected Areas -- a Novel Approach

Bauerek

Diatta

Pierzchała

et al. 2021

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The blends of coal combustion by-products (CCBs) with organic wastes (sewage sludge and spent mushroom compost) were investigated for elaboration of soil substitutes for land rehabilitation of coal mine affected areas. The study incudes four types four types of habitat with different water retention and fertility i.e.: dry and moderate fertility (A1-A3), mesic and low fertility (B1-B3), mesic and moderate fertility (C1-C3), humid and low fertility (D1-D3). Obtained results revealed that the amounts of macronutrients were sufficient for supporting plant growth i.e.: N (0.44-0.60 %), P (0.13-021 %), K (1.63-1.98 %), Mg (1.01-1.38 %), Ca (5.32-8.23 %), S (2.66-4.12 %), whereas the concentration of organic matter varied within the range 20.3-27.9 %. Phytotest using white mustard (Sinapis alba) seeds under laboratory conditions showed that the best results of sprouting i.e: 56 and 66 % were obtained for D2 and D3, respectively. The values of pH (8.16-8.78) and electrical conductivity (5.28-6.73 mS·cm-1) of tested soil substitutes were found to be the decisive factors limiting the germination process. The coefficients between the parameters of soil substitutes and the Sinapis alba sproutings have revealed negative correlation with electrical conductivity (r = -0.46). Additionally, tests with meadow vegetation gave promising opportunity for the use of soil substitutes in the process of land rehabilitation. The cover of the mesic and dry meadow vegetation reached 90%. The Principal Component Analysis (PCA) has outlined that pH, content of P and organic matter, are the most important factors that influence cover of meadow vegetation.

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Assessment of Heavy Metals Inactivation in Contaminated Soil by Coal Fly and Bottom Ashes

Cited by 4 publications

References 33 publications

Development of Soil Substitutes for the Sustainable Land Reclamation of Coal Mine-Affected Areas

Development of Soil Substitutes for the Sustainable Land Reclamation of Coal Mine-Affected Areas

Assessment of the Enrichment of Heavy Metals in Coal and Its Combustion Residues

Industrial By-Products for the Rehabilitation of Coal Mining-Affected Areas -- a Novel Approach

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