Plant uptake of major and trace elements from soils amended with a high-calcium dry flue gas desulfurization by-product

Burgess-Conforti, Jason R.; Miller, David M.; Brye, Kristofor R.; Pollock, Erik D.

doi:10.1016/j.fuel.2017.07.056

Cited by 6 publications

(3 citation statements)

References 16 publications

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“…The conversion relationship between the mass ratio of fillers to asphalt m 1 /m 2 and the volume fraction of mineral powder φ F is given in Equation (7).…”

Section: Evaluation Indicators For Asphalt-filler Interaction Based O...mentioning

confidence: 99%

“…However, the dry flue gas desulfurization ash (DFGDA), a byproduct of this process, is challenging to recycle and is mainly deposited in piles and landfills, with only a small portion effectively used [6]. The difficulty in recycling DFGDA results in the waste of potential resources and environmental pollution because DFGDA contains abundant calcium sulfate hemihydrate, The unstable calcium sulfite during utilization is easily and slowly oxidized to calcium sulfate in humid environments and then decomposed to sulfur dioxide under acidic or high-temperature conditions [7,8]. Therefore, the application of DFGDA in asphalt pavement materials has rarely been reported [9,10].…”

Section: Introductionmentioning

confidence: 99%

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Feasibility Analysis of Resource Application of Dry Flue Gas Desulfurization Ash in Asphalt Pavement Materials

Li,

Zhou,

Zhang

et al. 2024

Coatings

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To verify the feasibility of applying dry flue gas desulfurization ash (DFGDA) to asphalt pavement materials, the asphalt mastic (filler and asphalt composition) prepared by adding different proportions of DFGDA and LSP (limestone powder) into 70# matrix asphalt was studied experimentally. The asphalt mastics were subjected to the penetration test, the softening point test, and the ductility test. Moreover, the rheological properties of asphalt mastic were evaluated with dynamic shear rheometer (DSR) tests and bending beam rheometer (BBR) tests. An interaction ability index C-value based on the Palierne model was proposed to evaluate the interaction ability between DFGDA and asphalt. The influence of DFGDA asphalt on the interaction ability of matrix asphalt was observed and evaluated using Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The results showed that with the increasing proportion of DFGDA, the penetration of asphalt mastic gradually decreased, the softening point increased, and the ductility slightly decreased. At the same temperature, the dynamic shear modulus G* of the asphalt mortar significantly increased with increasing DFGDA content. The incorporation of DFGDA negatively affected the low-temperature plastic deformation resistance of asphalt, but the impact was weakened with the growing DFGDA amount and the powder mastic ratio. The combination mode of DFGDA and matrix asphalt depends on the physical blending, and their interaction ability mainly depends on the miscibility between DFGDA and matrix asphalt. In conclusion, DFGDA can be utilized as a novel filler in asphalt pavement materials.

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“…The conversion relationship between the mass ratio of fillers to asphalt m 1 /m 2 and the volume fraction of mineral powder φ F is given in Equation (7).…”

Section: Evaluation Indicators For Asphalt-filler Interaction Based O...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Feasibility Analysis of Resource Application of Dry Flue Gas Desulfurization Ash in Asphalt Pavement Materials

Li,

Zhou,

Zhang

et al. 2024

Coatings

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“…In the consumption and utilization of fossil energy, a large number of pollutants will inevitably be generated. Sulfur dioxide from coal-fired power generation is an important factor in the formation of acid rain, photochemical smog, and other phenomena, which are extremely harmful to human health, forests, crops, buildings, soil, surface water, etc. − In the existing flue gas desulfurization (FGD) technology, it can be divided into dry flue gas desulfurization (DFGD), − semidry flue gas desulfurization (SDFGD), − and wet flue gas desulfurization (WFGD) − according to the dry and wet state of desulfurization products in the desulfurization process. Among them, the limestone–gypsum wet flue gas desulfurization technology is the most widely used due to its most mature technology, high desulfurization efficiency, rich limestone sources, and available byproduct gypsum. − …”

Section: Introductionmentioning

confidence: 99%

Enhanced Wet Flue Gas Desulfurization Properties by Additives of Organic Acids, Organic Salts, Inorganic Salts, and Organic Amines

et al. 2020

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In order to enhance wet flue gas desulfurization efficiency and reduce cost, the effects of different series of additives (typical organic acids, organic salts, inorganic salts, organic amines, and their mixture) on the desulfurization properties, including pH buffering characteristics of slurry, dissolution characteristics of CaCO 3 , oxidation characteristics of CaSO 3 , desulfurization efficiency, and economic cost were investigated in this work. The results show that the pH buffering capacity is sodium benzoate ≈ Na 2 SO 4 > adipic acid > double oxazine. The dissolution promoting effect of CaCO 3 is acetic acid > double oxazine ≈ sodium acetate > MgSO 4 . The additives that can significantly promote the oxidation of CaSO 3 are adipic acid, citric acid, acetic acid, MgSO 4 , and Na 2 SO 4 . Without an additive, the desulfurization efficiency of CaCO 3 slurry decreased to 85.87% after 4 h. After the addition of the composite additive (CA-3), the desulfurization efficiency of CaCO 3 slurry remained 96.53% for 4 h, increasing by 10.66%. The main reasons for the enhancement in the desulfurization process may be a collection of three factors: the reversible hydrolysis reactions of acetic acid and sodium acetate, the formation of an acid−base conjugate system by sodium benzoate, and the formation of a neutral ion pair MgSO 3 by MgSO 4 in the slurry. In addition, the composite additive has been used in the Dabie mountain power plant of China. The economic benefit analysis shows that the desulfurization unit of 4 × 640 MW coal-fired power plant can save 1.26 million dollars per year by composite additive.

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Water regime enhances the effects of flue gas desulfurization gypsum on the reclamation of highly saline‐sodic soil

Zhang

Zhao

et al. 2022

Land Degrad Dev

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Flue gas desulfurization (FGD) gypsum-based reclamation of saline-sodic soil has been widely used in the Songnen Plain of China, but its reclamation effect depends on the water regime. A pot experiment was conducted to identify the optimal water regimes for reclaiming a highly saline-sodic soil [pH, electrical conductivity (EC) and exchangeable sodium percentage (ESP) were 10.4, 5.5 dS m-1 and 68.1%, respectively] by using FGD gypsum. Three water regimes with drainage times [irrigation amounts of 3-, 5-, and 7-times the soil pore volume (PV)] were selected and FGD gypsum was added to a portion of the regimes before the final drainage operation.Then the saline-sodic parameters of drainage and soil were measured and analyzed. Na + , Cl À , HCO 3 À , and SO 4 2À were the main ions in the drainage of all the treatments.With the increase in drainage times, the water regime without FGD gypsum notably decreased soil EC by 17.8%-52.0%. In contrast to the FGD gypsum treatment, the water regime failed to decrease the soil ESP. FGD gypsum application with three drainage times had optimal reclamation with reductions in soil pH and ESP of 0.5-2.3 units and 5.1%-20.1%, respectivley. But the associated water consumption was more than 40% higher than that of one-or two-drainage operations. In terms of water reduction (irrigation volume was 5 times PV), sodicity reduction and salt removal (soil pH, ESP, and EC were reduced by 1.7 units, 12.3%, and 1.12 dS m À1 ), FGD gypsum application with two-time drainage could be a more suitable measure to reclaim highly saline-sodic soil.

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Plant uptake of major and trace elements from soils amended with a high-calcium dry flue gas desulfurization by-product

Cited by 6 publications

References 16 publications

Feasibility Analysis of Resource Application of Dry Flue Gas Desulfurization Ash in Asphalt Pavement Materials

Feasibility Analysis of Resource Application of Dry Flue Gas Desulfurization Ash in Asphalt Pavement Materials

Enhanced Wet Flue Gas Desulfurization Properties by Additives of Organic Acids, Organic Salts, Inorganic Salts, and Organic Amines

Water regime enhances the effects of flue gas desulfurization gypsum on the reclamation of highly saline‐sodic soil

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