Properties and microstructure of soil solidified by titanium slag …
Using Portland cement for soil solidification has sustainability issues due to high energy-consumption and carbon emissions.An innovative approach suggests using titanium slag and flue gas desulfurized gypsum as substitutes for Portland cement for soil solidification. This study systematically evaluates the effects of titanium slag-flue gas desulfurized gypsum …
Modification mechanism of flue gas desulfurization gypsum on fly …
This waste gypsum has not been effectively utilized and is generally discarded at landfill sites [12]. It has been proved that the presence of sulfate could improve the leaching of alumina to produce fibrous ettringite crystals that form a network structure [19], [20], further enhancing the degree of polymerization and strength [21], [22].
Improvement of Saline-Alkaline Soil via Flue Gas Desulfurization …
Flue gas desulfurization gypsum (FGDG) is an effective soil amendment. However, some heavy metals present in FGDG may enter soil or groundwater due to surface rainfall, …
Impacts of various amendments on the microbial communities and soil
Thus, it can reduce the damage of alkali by replacing the Na + ions on soil colloids and also improve soil aggregation and microbial activity, which is a topic of major concern (Luo et al., 2018). The combination of straw and desulfurized gypsum has become an important measure to enhance saline–alkali soil.
Desodification of salt-affected agricultural soil using gypsum
Mechanism of Desodification ② (sodium discharge by aggregation) ... Practical implementation of alkaline soil improvement and stable food production by desulfurized gypsumMatsumoto and Chun, ... Effect of Soil-improving Inputs for the Salts Exclusion from reclaimed land in Kasaoka BayFaculty of Agriculture, Okayama University. Miyake et al ...
Steering the early strength of clinker-free cementitious mortar by
The production of cement is a highly energy-intensive process, which consumes 3.0 % of the world's annual energy output and releases roughly 8.0 % of the global CO 2 emissions [1], [2], [3].To meet the carbon neutral goal and alleviate global energy crisis, developing a green and low-carbon approach for cement production is urgently required.
A comprehensive review of flue gas desulphurized gypsum: …
Due to these characteristic properties, FGDG finds the best use as a construction material [31]. FGD gypsum has a fine particle size and a high surface area, which makes it an effective soil amendment for improving soil structure and fertility. FGD gypsum is also highly soluble, which makes it a good source of calcium and sulfur for plants.
Amendment of Saline–Alkaline Soil with Flue-Gas Desulfurization Gypsum
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. Thus, the changes in the levels of soil salinity, alkalinity, crop yield, and other physicochemical properties in different soil types and crops after reclamation and planting with …
Coapplication of humic acid and gypsum affects soil chemical
This study investigated the effects of humic acid (HA), flue gas desulfurization gypsum (FG), and their combined application on soil chemical properties, rice yield, …
Cover Crop Complements Flue Gas Desulfurized Gypsum to Improve …
Integration of flue gas desulfurized gypsum (FGD-gypsum) with cover crops is expected to improve soil quality (SQ). Our objectives were to evaluate the impact of FGD-gypsum and rye on SQ and the contribution of core indicators to account for SQ variability in a rainfed corn-soybean system.
Effect of Industrial Byproduct Gypsum on the Mechanical …
1. Introduction. BPG is an industrial solid waste primarily composed of calcium sulfate. Its main components include desulfurized gypsum (DG), phosphogypsum (PG), and titanium gypsum (TG), with smaller amounts of fluorogypsum, salt gypsum, and others [1,2,3].Figure 1 shows the distribution proportions of BPG sources in China. BPG contains various impurities and harmful …
Study on the influence mechanism of flue gas desulphurisation gypsum …
Semantic Scholar extracted view of "Study on the influence mechanism of flue gas desulphurisation gypsum on solid waste-based geopolymer grouting materials" by Dedan Duan et al. ... Silage and flue gas desulfurized gypsum as additives improve green waste composting. Wan Yang Z. Yin Lu Zhang. Environmental Science. Journal of Environmental ...
Application Amount of Desulfurized Gypsum from Coal Fired …
In order to protect national grain safety and ecological safety and develop a sustainable economy,it is important to improve alkaline land with desulfurized gypsum from coal fired power plants.Representative lightly alkalized soil,medium-alkalized soil and seriously alkalized soil in Xidatan of Ningxia Province were selected in the research and used in pot and soil column …
Application of flue gas desulfurization gypsum improves multiple
To ameliorate saline-sodic soils various approaches are used, such as chemical amendments and phytoremediation (Qadir et al., 2008; Shaaban et al., 2013; Wang et al., 2017).Among these methods, gypsum has been used as a chemical amendment as early as the late 18th century (Crocker, 1922).Gypsum addition with irrigation can ameliorate saline-sodic …
Hydrophobic modification of building gypsum by peat soil: An in …
1. Introduction. Since ancient times, gypsum was used as a building materials. The history of the architectural application of gypsum dates back to ancient Egypt in 7000 BCE [1].Building gypsum or gypsum binder (CaSO 4 ·0.5H 2 O) is made of natural or industrial by-product gypsum by heating and dehydration at a specific temperature. Although human beings …
Interactions between flue gas desulfurization gypsum and biochar …
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 …
Strength and Mechanism of Carbonated Solidified Clay with …
carbonate are primary reasons for improving the UCS of the stabilised clay during carbonization. This research promotes steel slag and desulfurized gypsum as green stabilisers for soil stabilization, and the method of carbonation curing contributes to the higher UCS, which also greatly shortens the curing time. Solidified clay
Effects of hybrid fibers on properties of desulfurized gypsum …
Blending flue gas desulfurization (FGD) gypsum with surface sodic soil is a universally recognized method for the rapid amelioration of sodic soils; however, little information is available on ...
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 ...
Application of Flue Gas Desulfurization Gypsum and Its Impact …
F lue gas desulfurization gypsum (FGDG) is a synthetic gypsum that is created during the removal of SO 2 from flue gas by reacting the SO 2 with calcite (CaCO 3) to form calcium sulfite (CaSO 3 ·0.5H 2 O), which is further treated with wet limestone and forced oxidization to form calcium sulfate (CaSO 4 ·2H 2 O) (Laperche and Bigham, 2002).Synthetic …
Utilization of flue gas desulfurization gypsum to produce green …
Flue gas desulfurized gypsum (FGDG) is an industrial by-product discharged from thermal power plants, smelters, and large-scale enterprise boilers. ... thus improving the strength of soil. After 10 dry-wet cycles, the hydration products content in SDS increased obviously, and the microstructure became denser, indicating that the FGDG-based ...
Reclamation of saline-sodic soil properties and improvement of rice
In the present study, the effects of desulfurized gypsum on physical and chemical properties of saline-sodic soil and growth and yield of rice (Oriza sativa L.) were assessed in a soil column ...
Effect of Combined Application of Desulfurization Gypsum and …
These results showed that the combined application of G and K could have a more favorable impact on soil improvement by reducing soil pH, enhancing soil ion exchange, …
Combined Application of Desulfurization Gypsum and …
Both single and mixed application of desulfurization gypsum significantly increased soil Ca2+, SO42−, and Mg2+ contents and significantly reduced soil pH, sodium adsorption ratio, and bulk density.
Study on the Micro Mechanism of Failure Evolution of
To investigate the macroscopic mechanical properties and failure evolution mechanism of desulfurization gypsum–fly ash fluid lightweight soil, a microscale numerical model using PFC2D (Particle Flow Code) was constructed. Uniaxial compression tests were conducted to determine the microscopic parameters of the model, extracting information on the discrete …
Study on the Improvement Effect of Desulfurization Gypsum in …
The results showed that the application of desulfurization gypsum could reduce the harm of salt and alkali in soil to the germination, emergence and growth of millet seeds. …
Strength and Microscopic Mechanism of Cement–Fly Ash–Slag
The addition of desulfurized gypsum promotes the growth of expansive crystals of ettringite . The soil system becomes denser due to the expansion of fibrous crystals. As the solidification …
Investigation on the effects of desulfurization gypsum on the
It has been documented that the addition of desulfurization gypsum (DG) can improve the engineering properties of OPC (Guo and Shi, 2008; Boonserm et al., 2012). Similarly, needle-like ettringite (AFt) can be generated by the activation of FA by DG in the GGBS-FA-DG ternary geopolymer ( Singh and Garg, 1995 ; Shen et al., 2007 ; Meskini et al ...
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 …
Performance regulation of desulfurized gypsum on solid waste …
These wastes can contaminate soil and groundwater, severely impacting ecological sustainability, if not properly managed [2], ... which not only improve waste utilization but also align with low-carbon development principles. ... The effects of desulfurized gypsum on the mechanical properties of dredged clay with high initial water content ...