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Saline sodic soil colloids contain a large number of exchangeable sodium ions leading to soil aggregates breakdown clay dispersion and soil pores sodic soils improvement requires two processes providing calcium source to exchange with sodium on soil surface and removing salt through leaching or this study we used corn straw and desulfurized
·Flue gas desulfurized gypsum FGD gypsum mainly originates from thermal power plants smelters and large scale enterprise article reviews the production in China and the latest beneficial utilizations of FGD gypsum China is a large coal consuming country and has always had serious SO 2 emissions Therefore the Chinese government has
·Two types of SWs including fly ash FA and desulfurized gypsum DG were used to prepare cementitious backfilling materials for underground mined out areas Ordinary Portland cement OPC was
·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 phase change composites for waste removal and renewable energy storage Yaxuan Xiong Li Shuo kinetics of cementitious steel slag fly ash desulfurized gypsum
·Gypsum meets the criteria for fireproof materials due to its bounded water molecules Vilches et al Another challenge is the transportation and storage of FGD gypsum which can be costly due to its bulk and weight However some power plants are exploring innovative solutions such as the use of synthetic gypsum produced from FGD
·FGD gypsum and cover crop effects on soil physical properties Bulk density ρb as a measure of soil compaction was significantly affected by FGD gypsum and cover crop managements Table 7 FGD gypsum amendments marginally decreased ρb while the cover crop significantly decreased the ρb by more than 4% compared to the control
·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 sent to the gypsum storage bin for storage after concentration and dehydration and can be sold for reuse The fog drops of the flue gas after desulfurization are removed by the demister and discharged from the chimney after passing through the heat exchanger See Fig 8 for the process flow chart
·In this sense silage SG and flue gas desulfurized gypsum FGDG are two good choices as composting additives SG is made from the roughage obtained by cutting corn sorghum and other forage crops and grass; the roughage is then subjected to anaerobic fermentation by lactic acid bacteria which results in the generation of SG [19]
DOI / Corpus ID 226335113; Preparation characterization and application of red mud fly ash and desulfurized gypsum based eco friendly road base materials
·In the limestone gypsum flue gas desulfurization process 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 % sulfur in coal A substantial amount of desulfurized gypsum is generated as a by product
When the amount of desulfurized gypsum applied to moderate saline alkali soil and severe saline alkali soil exceeded 30 t·hm 2 the increase rate of crop yield Oil sunflower alfalfa corn rice wheat Lycium barbarum and sweet sorghum showed a decreasing trend To further analyze the effect of desulfurized gypsum on the improved saline
·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 · 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
·Abstract As a relatively fast setting building material desulfurized gypsum is difficult to use Citric acid sodium gluconate and sodium tripolyphosphate were used to design and prepare a desulfurized gypsum paste containing single or combined retarders The effects of the retarder type and content on the setting inhibition and mechanical properties of
·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
·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 beneficial utilizations of FGD gypsum China is a large coal consuming country and has always had serious SO 2 emissions Therefore the Chinese
·As we know coal is the dominant energy in Chinese energy mix Almost all of the coal fired power plants are required to equip desulfurization facility to remove SO 2 in the flue gas as illustrated in Fig most popular desulfurization technology is wet FGD using limestone with the product called FGD gypsum which main content is CaSO 4
·[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
·Production and resource utilization of flue gas desulfurized gypsum in China A review Sen Liu Wei Liu Fen Jiao W Qin Cong ren Yang Environmental Science Engineering Environmental pollution 2021; 93 Save Effect of nano silica and silicone oil paraffin emulsion composite waterproofing agent on the water resistance of flue gas
·The obtained semi aqueous desulfurized gypsum was the original desulfurized gypsum which was placed in an oven at 180 °C and dehydrated for 2 h under synchronous heating with the box The microscopic morphology of desulfurization gypsum from SEM and XRD analysis is shown in Fig 1 The original desulfurization gypsum featured rhombic blocks
·Compared to the control soil inorganic carbon storage increased by 0 211 kg·m 2 and 0 182 kg·m 2 with application rates of 10 and 40 t·hm 2 of desulfurized gypsum respectively while the remaining treatments showed lower inorganic carbon storage than
·The addition of a retarder lengthened the induction period of desulfurized gypsum and changed the morphology of desulfurized gypsum hydrated crystal thus extending the setting time and reducing the strength Author Information for temporary storage on one computer for purposes of viewing and/or printing one copy of a Document for
