Effect of Combined Application of Desulfurization Gypsum and …

Saline-alkali soil imposes severe adverse effects on soil utilization and agriculture production worldwide. Amelioration of saline-alkali soil is crucial to ensure global food security and promote sustainable agricultural development. Here, the effects of the combined application of soil amendment desulfurization gypsum (G) and KIA (K, an industrial organic by-product) on soil …

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Influence of Calcined Flue Gas Desulfurization Gypsum and …

The above research shows that the application of desulfurized gypsum in concrete systems will help improve the overall performance of concrete, realize the industrial utilization of desulfurized gypsum, and turn desulfurized gypsum into treasure, which is in line with the green and low-carbon development concept. ...

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Environmental risk assessment of industrial byproduct gypsum …

Although studies have shown that desulfurized gypsum can be used for mine backfilling, the leakage risk of pollutant elements that affects the safety of the groundwater …

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Combined Application of Desulfurization Gypsum and Biochar for …

Desulfurization gypsum is a product of flue-gas desulfurization of harmful gases produced during coal combustion in thermal power plants . ... (Oriza sativa L.) growth and yield using desulfurized gypsum in the west of Songnen Plain, northeast China. Geoderma 2012, 187, 24–30. [Google Scholar] Yu, H.; Yang, P.; Lin, H.; Ren, S.; He, X ...

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Preparation, characterization and application of red mud, fly ash …

Red mud (RM), fly ash (FA) and desulfurized gypsum (DG) are harmful solid wastes that need to be treated. In this study, RM, FA, DG were used as the main raw materials to prepare road base materials based on the different (CaO + Na 2 O)/(SiO 2 +Al 2 O 3) molar ratio, and its mechanical properties, durability, microstructure and environmental performance were …

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Preparation, characterization and application of red mud, fly ash …

Red mud (RM), fly ash (FA) and desulfurized gypsum (DG) are harmful solid wastes that need to be treated. In this study, RM, FA, DG were used as the main raw materials to prepare road base materials based on the different (CaO + Na 2 O)/(SiO 2 +Al 2 O 3 ) molar ratio, and its mechanical properties, durability, microstructure and environmental performance were investigated.

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Improvement of Saline-Alkaline Soil via Flue Gas Desulfurization Gypsum

[21] Tobert HA and Watt DB 2014 Impact of flue gas desulfurization gypsum application on water quality in a coastal plain soil J Environ Qual 43 273-280. Google Scholar [22] Tong ZJ, Li QS and Zhou YS 2009 Effects of desulfurized gypsum on heavy metal desorption and speciations in tidal flat reclaimed soil Eco and Environ Sci 18 2172-2176 in ...

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Development of slag-based filling cementitious materials and their

The experimental analysis revealed that the influence of the desulfurized gypsum content on the strength at 3, 7, and 28 days is greater than that of the cement clinker content. Integrating the results from the orthogonal experiment and the RBF neural network predictions, the optimal mix ratio was identified as 11 % desulfurized gypsum, 12 % ...

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ect of Industrial Byproduct Gypsum on the Mechanical …

gypsum, phosphogypsum, and titanium gypsum, whic h account for 88% of the total BPG in China. The large-scale utilization of these three types of solid waste is crucial for the safe disposal of BPG.

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Synergistic effect of red mud, desulfurized gypsum and fly ash in

@article{Wang2023SynergisticEO, title={Synergistic effect of red mud, desulfurized gypsum and fly ash in cementitious materials: Mechanical performances and microstructure}, author={Yaguang Wang and Xiaoming Liu and Xiang Zhu and Wenxi Zhu and Jianwei Yue}, journal={Construction and Building Materials}, year={2023}, url={https://api ...

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Investigation on the compressive strength of desulfurization gypsum

The ultra-high addition of 20 % desulfurized gypsum is beneficial to improve the strength of DG-based binary cementitious materials with low energy consumption. ... indicating that the explored binary cementitious materials are environmentally friendly and green materials and has no harmful effects on the environment, either in the long term or ...

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WO2018166220A1

A method for co-producing sulphoaluminate cement and sulfur by using desulfurized gypsum and aluminum ash, comprising: (1) drying aluminum ash, and heating desulfurized gypsum for dehydration to obtain semi-hydrated gypsum; (2) mixing the aluminum ash with the semi-hydrated gypsum according to a preset ratio, pulverizing, and homogenizing; (3) calcining the pulverized …

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Experimental investigation of utilizing waste flue gas desulfurized

Flue gas desulfurized gypsum (FGDG) is a waste material produced in the power stations during the flue gas desulfurization process. In China, a small amount of FGDG is used as cement additives or for gypsum boards, but there still exist a mass of FGDG due to the lack of reusing methods. Also, the waste fly ash (WFA) is another waste material ...

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the generation and harm of desulfurized gypsum in Oman

Experimental Study on Desulfurized Gypsum Modified … The influences of desulfurization gypsum on the properties of both Magnesium oxychloride cement (MOC) pastes and MOC abrasive tools were investigated in this study.

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Main uses of power plant desulfurization gypsum | LZZG

The desulfurized gypsum powder also contains silica, sodium oxide, calcium carbonate, calcium sulfite, limestone, calcium chloride, magnesium chloride, etc. Compared with other gypsum powder, desulfurized gypsum powder has the characteristics of renewable, small particle size, stable composition, low content of harmful impurities, and high purity.

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Production and resource utilization of flue gas desulfurized gypsum …

Flue gas desulfurized gypsum (FGD gypsum), mainly originates from thermal power plants, smelters, and large-scale enterprise boilers. This article reviews the production in China and the latest ...

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Flue Gas Desulfurization Gypsum

The semi-hydrate content of desulfurized gypsum is adjusted as a natural plaster substitute for producing gypsum board, wallboard [107].The modified treatment of desulfurized gypsum with cement, inorganic waste, straw fiber and other wastes can be used to manufacture high-insulation and compression-resistant wall materials [108].Desulfurized gypsum is incorporated into the …

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American-Made Drywall Emerges as Potential Danger

Nearly half of American drywall is now made with this synthetic product, known as flue gas desulfurized gypsum or FGD gypsum. Despite its increasing popularity, synthetic gypsum isn't regulated...

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Mechanical Properties and Coagulation Characteristics of Flue …

In the limestone gypsum flue gas desulfurization process, 2.7 ton of desulfurized gypsum can be generated for each 1 ton of SO 2 removed . A 300 MW coal-fired thermal power unit discharges about 30,000 ton of desulfurized gypsum every year (assuming 1.0% sulfur in coal) . A substantial amount of desulfurized gypsum is generated as a by-product ...

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Summary of research progress on industrial flue gas desulfurization

SO 2 causes great harm to the environment and humans. Historically, famous smog events such as the Maas Valley smog, London smog, ... Desulfurized gypsum can not only improve saline-alkali soils and increase crop yields; it can also be used as an additive to make cement, concrete, wall materials, etc. The sodium-alkali method is widely used in ...

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Gas Desulfurization Gypsum-Based Polymer Materials

the limestone gypsum flue gas desulfurization process, 2.7 ton of desulfurized gypsum can be generated for each 1 ton of SO2 removed [3]. A 300 MW coal-fired thermal power unit discharges about 30,000 ton of desulfurized gypsum every year (assuming 1.0% sulfur in coal) [4]. A substantial amount of desulfurized gypsum is generated as a by-product

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Effects of saline improvement and leaching of desulphurized gypsum

In order to investigate the effect of leaching, gypsum and furfural residue on soil properties and yield of oil sunflower planted in newly reclaimed takyric solonetz land, a comparative field experiment in 2012 was conducted at the farmland of Ningxia Xi Da Tan of China (106°24'209"E, 38°50'289"N). Three leaching amount (3600, 4500 and 4800 ...

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A brief review on flue gas desulfurization gypsum recovery toward

The accumulation of a large amount of flue gas desulfurized gypsum (FGDG) not only occupies valuable land resources, but also the harmful substances such as fluorine and heavy metals in FGDG may increase environmental risks. In addition, plants need large quantities of limestone as a desulfurizer. Limestone mainly comes from mining, and the ...

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Characterization of flue gas desulphurized (FGD) gypsum of a

Thermal Power Plant generates FGD gypsum as by-product during coal combustion. This study evaluates the characterization (spectroscopic and elemental), …

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(PDF) The Key Application Technology of Desulfurized Gypsum …

The results show that adding desulfurized gypsum, which accounts for 6% to 8% of the total mass of the cementitious material, has no adverse effect on the workability and can significantly improve ...

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Desulfurization gypsum uses and properties

Desulfurization gypsum has few harmful components. When used as a cement retarder, it can basically replace natural gypsum. The prepared cement performance is not much different …

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Effect of Mineral Admixtures on Physical, Mechanical, and

In the future, the effects of three-phase composition, particle size of desulfurization building gypsum, and multiple mineral admixtures on the performance of gypsum-based self …

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Recent advances in flue gas desulfurization gypsum processes …

Mercury is considered a toxic pollutant harmful to our human health and the environment. Mercury is highly persistent, volatile and bioaccumulated and enters into the food chain, destroying our ecosystem. ... Flue gas desulfurized gypsum mainly comes from thermal power plants, smelters, and large-enterprise boilers, and contains industrial by ...

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Properties and microstructure of soil solidified by titanium slag …

The Portland cement-fly ash-desulfurized gypsum composite solidifier brings the dredged soil to have higher strength and good resistance to dry-wet cycles ... However, the contents of harmful heavy metal ions in titanium slag are very low, and the leaching risks of heavy metal ions are negligible when applied to soil solidification [34], [35 ...

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A critical review on the use of flue gas desulfurization gypsum to

Dicarboxylic acid modifiers play a crucial role in the controlled synthesis of α-hemihydrate gypsum (α-HH) with an aspect ratio (AR) close to 1 from flue gas desulfurized (FGD) gypsum. However, the effect of dicarboxylic acid modifiers in the preparation of α-HH by FGD gypsum and the mechanism of action is unclear.

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