The process of wet limestone flue gas desulfurization produces gypsum as a waste by-product, which has been utilised to remove lead (Yan et al., 2015), cadmium (Yan et al., 2014) and silicate (Kang et al., 2018) from wastewater. FGD gypsum exhibits efficient adsorption and precipitation ability.
Gypsum has been shown to reduce runoff on soils prone to crust formation in the southeastern United States. Increased infiltration from gypsum applications could therefore help reduce runoff P and other nutrient losses from application of broiler litter (BL), a nutrient-rich fertilizer.
With the rapid development of industries, flue gas desulfurization (FGD) gypsum has become one of the bulk industrial solid wastes which trigger many local environmental problems in China. Due to the high purity of calcium sulfate dehydrate, FGD gypsum has a high potential for eco-friendly calcium sulfoaluminate (CSA) cement …
In this paper, waste gypsum from wet flue gas desulfurization (WFGD) mixed with NH3·H2O was applied for CO2 absorption in the solid-liquid-gas phase system. The effects of operation temperature, CO2 flow rates, and ammonia-to-gypsum ratio on carbonation process were discussed. Meanwhile, a model for CO2 absorption in the …
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Abstract BACKGROUND In this study, a flue gas desulfurization (FGD) gypsum was calcined as phosphate sorbent materials for the remediation of phosphate wastewater. RESULTS In addition to the main c...
To explore the possibility of using flue gas desulfurization gypsum (FGDG) for inhibiting phosphorus (P) loss due to agricultural runoff, a 3-year study was performed in the farmlands of Chongming Dongtan between 2012 and 2015. Five different quantities of FGDG were used to treat the soil, and the e …
Flue gas desulfurization gypsum (FGDG) is an industrial by-product generated during the flue gas desulfurization process in coal-fired power plants. Due to its abundance, …
The treatment of flue-gas desulfurization (FGD) gypsum, a common solid waste ma-terial that is often affected by chloride ions, typically occupies large amounts of land, causes resource waste, and results in environmental pollution.
Appropriate land management is important for improving the soil quality and productivity of the saline-sodic farmland. A recent study has revealed that flue gas desulfurization (FGD) gypsum and lignite humic acid application enhanced the salt leaching and crop production. The purpose of this study was to investigate the effects of …
However, the large‐scale application of flue gas desulfurization (FGD) gypsum for the reclamation of high‐sodicity wasteland to obtain productive fields still lacks quick and concise evaluation indicators. Therefore, four FGD gypsum reclamation practices were applied in high sodicity‐affected wastelands.
Purpose For an alkaline–saline region in Northwest China, we examined the responses of soil microbial communities to flue gas desulfurization gypsum by-products (FGDB), a new ameliorant for alkaline–saline soils. In 2009 and 2010, we collected soils from 0–20 cm and 20–40 cm depths along an experimental FGDB gradient (0, 0.74, …
Piling or landfill disposal of desulfurization gypsum has caused serious environmental pollution so that environmental protection agencies are now assessing heavy penalties in China.
The process of wet limestone flue gas desulfurization produces gypsum as a waste by-product, which has been utilised to remove lead ( Yan et al., 2015 ), cadmium ( Yan et al., 2014) and silicate ( Kang et al., 2018) from wastewater. FGD gypsum exhibits efficient adsorption and precipitation ability.
The treatment of flue-gas desulfurization (FGD) gypsum, a common solid waste material that is often affected by chloride ions, typically occupies large amounts of land, causes resource waste, and …
The massive accumulation of flue gas desulfurization (FGD) gypsum produced in the wet limestone-gypsum flue gas desulfurization process not only encroaches on lands but …
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Flue gas desulfurization (FGD) gypsum and straw return have been recognized for their roles in reducing soil sodicity and improving soil organic matter. However, there are few studies on the effect of their combination on improving and fertilizing sodic soil. FGD gypsum at a rate of 15 t ha −1 and three types of straw (sunflower seed …
Numerous mitigation techniques have been incorporated to capture or remove SO2 with flue gas desulfurization (FGD) being the most common method. Regenerative FGD method is advantageous over other methods due to high desulfurization efficiency, sorbent regenerability, and reduction in waste handling. The …
To effectively solve the problem of recovery and utilization of flue gas desulfurized gypsum (FGDG), a new method for preparing SO2 gas by adding a mixture of FGDG and pyrite into a boiling furnace and utilizing its high-temperature waste heat is proposed. Using the FactSage 6.1 Reaction module and the Equilib module, the …
Soil salinization has progressed rapidly in northeastern and western China. In addition, air pollution is one of the most serious environmental problems. To alleviate the problems of soil salinization, food shortages, and air pollution, we have studied the amelioration of salt-affected soil using the by-products of flue gas desulfurization …
The massive accumulation of flue gas desulfurization (FGD) gypsum produced in the wet limestone-gypsum flue gas desulfurization process not only encroaches on lands but also causes serious environmental pollution. The preparation of α-hemihydrate gypsum (α-HH) is an important way to achieve high-value utilization of FGD gypsum. Although the …
Flue gas desulfurization (FGD) gypsum and straw return have been recognized for their roles in reducing soil sodicity and improving soil organic matter. However, there are few …
Flue gas desulphurization (FGD) gypsum samples were collected from 70 power plants in 20 provinces in China. The total Hg concentration, chemical speciation and leaching toxicity of Hg in the samples were determined. The total Hg concentrations ranged from not detectable (ND) to 4330μg/kg with an average of 891μg/kg and a median of 629μg/kg.
The mass transfer theory and research progress of flue gas desulfurization technology are discussed in detail in order to provide a reference for researchers. This provides …
The application of flue gas desulfurization gypsum (FGDG) improves the soil structure, reduces soil pH, and accelerates soil salt leaching. Biochar amendment to soil can affect the soil infiltration rate, increase soil porosity, decrease soil bulk density, and enhance the water retention capacity. This study investigated the interactive effect of …
Flue gas desulfurized gypsum (FGD gypsum), mainly originates from thermal power plants, smelters, and large-scale enterprise boilers. This article reviews the production in …
Flue gas desulfurization (FGD) systems using lime or limestone as the chemical reagent are widely used throughout the world for SO 2 emissions control at coal-fired power plants. Ammonia-based ...
Semantic Scholar extracted view of "Characterization and leaching toxicities of mercury in flue gas desulfurization gypsum from coal-fired power plants in China" by Y. Hao et al.
The objective of our research is to examine salt- affected soil amelioration in Tianjin, China using both FGD gypsum and gypsum separated from WGB.
Emission reduction process for dechlorinating flue-gas desulfurization gypsum and reducing wastewater effluents: Application prospects from laboratory-scale studies
The synthesis of α -calcium sulfate hemihydrate ( α -CSH) from flue gas desulfurization (FGD) gypsum is a good way to realize the comprehensive utilization of FGD gypsum. To obtain α -CSH with the satisfactory performances, a facile hydrothermal-aging pretreatment process for FGD gypsum raw materials was proposed, where FGD …
The effective and safe use of FGD gypsum in agricultural land is still debated in some countries even though its effectiveness in soil management has been reported in many studies.
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