Fgd Gypsum(脱硫石膏)研究综述
Fgd Gypsum 脱硫石膏 - This study investigated the physical, chemical and geotechnical properties of WFGD gypsum and its potential application to develop cement-free bricks. [1] Therefore, the strength development and the role of FGD gypsum in the soil–cement–FGD gypsum mixtures with varying cement and FGD gypsum contents were characterized in this study. [2] FGD gypsum was either mixed with the growing medium or placed at the bottom of the containers. [3] FGD gypsum at a rate of 15 t ha−1 and three types of straw (sunflower seed shell, corn stover, and corncob crushed into straw pellets) at a rate of 7. [4] Consequently, appropriate facilities are required to ensure the environmentally safe processing of FGD gypsum and the resulting cement material properties. [5] Nano-silica was mixed with FGD gypsum to explore the influence of nano-silica particle size and content on the waterproofing and mechanical properties of FGD gypsum while also analyzing its waterproofing mechanism. [6] Flue gas desulfurized gypsum (FGD gypsum), mainly originates from thermal power plants, smelters, and large-scale enterprise boilers. [7] The result show that the leaching concentration of metal elements of the three gypsums is much lower than the leaching toxicity identification standard, so none of the three have the characteristics of leaching toxicity, and they are not classified as hazardous solid wastes; phosphorus gypsum and FGD gypsum are easier to release metal elements under low pH conditions, while the release of metal elements in titanium gypsum is not obvious under acidic conditions; the simulation results show that the diffusion concentration of metal elements increases with the passage of time, and its migration ability decreases with the increase of depth. [8] Two different calcium rich wastes: FGD gypsum and marble waste are incorporated without any chemical treatment in the polymer matrices. [9] The objective is to study the suitable ratios of FGD gypsum and WTS in the production of cement mortar. [10] These results were compared with the results of the environmental evaluation of gypsum derived from coal-fired power plants (FGD gypsum) and natural gypsum. [11] In this paper, the orthogonal test and two curing methods including 7-day non-soaking curing and 28-day periodical-soaking curing are used to investigate the effect of cement, activators and waste like blast furnace slag, silica fume and fly ash on the properties of FGD gypsum-based composites. [12] A 2-year field experiment was conducted on the Hetao Plain of China to evaluate the combined effects of straw layers (0, 6, 12 and 18 t ha−1) at a depth of 30 cm and FGD gypsum (0 and 0. [13] The gross product of FGD gypsum has reached 550 million tons in China by 2016 and quite a portion was discarded. [14] Addition of FGD gypsum to PL significantly increased corn grain yield by 15% in 2016. [15] The addition of FGD gypsum in the mixture was 4%, 8% and 12% by weight of cement. [16] However, limited information is available on the long‐term effects of FGD gypsum in agricultural fields. [17] 1% by mass, the FGD gypsum had a softening coefficient of 0. [18] The preparation of α-hemihydrate gypsum (α-HH) is an important way to achieve high-value utilization of FGD gypsum. [19] Quantitative evaluation of the effects of FGD gypsum on three-dimension (3D) pore characteristics is beneficial for understanding the reclamation mechanism of FGD gypsum on sodic soils. [20]本研究调查了 WFGD 石膏的物理、化学和岩土特性及其在开发无水泥砖方面的潜在应用。 [1] 因此，本研究描述了 FGD 石膏在不同水泥和 FGD 石膏含量的土壤-水泥-FGD 石膏混合物中的强度发展和作用。 [2] FGD 石膏要么与生长培养基混合，要么放置在容器底部。 [3] FGD 石膏的用量为 15 t ha-1，三种秸秆（葵花籽壳、玉米秸秆和玉米芯粉碎成秸秆颗粒）用量为 7。 [4] 因此，需要适当的设施来确保 FGD 石膏的环境安全加工和由此产生的水泥材料特性。 [5] 将纳米二氧化硅与脱硫石膏混合，探讨纳米二氧化硅粒径和含量对脱硫石膏防水性能和力学性能的影响，同时分析其防水机理。 [6] 烟气脱硫石膏（FGD石膏），主要来源于火电厂、冶炼厂、大型企业锅炉等。 [7] 结果表明，三种石膏的金属元素浸出浓度远低于浸出毒性鉴定标准，三者均不具有浸出毒性特征，不属于危险固体废物；磷石膏和脱硫石膏在低pH条件下更容易释放金属元素，而钛石膏中金属元素在酸性条件下释放不明显；模拟结果表明，金属元素的扩散浓度随着时间的推移而增加，其迁移能力随着深度的增加而降低。 [8] 两种不同的富含钙的废物：FGD 石膏和大理石废物在没有任何化学处理的情况下加入到聚合物基体中。 [9] 目的是研究FGD石膏和WTS在水泥砂浆生产中的适宜配比。 [10] 将这些结果与来自燃煤电厂的石膏（FGD石膏）和天然石膏的环境评价结果进行了比较。 [11] 本文采用正交试验和7 d不浸泡养护和28 d定期浸泡养护两种养护方法，研究水泥、活化剂和高炉渣、硅灰、粉煤灰等废弃物对混凝土的影响。 FGD石膏基复合材料的性能。 [12] 在中国河套平原进行了为期 2 年的田间试验，以评估 30cm 深度的秸秆层（0、6、12 和 18tha-1）与 FGD 石膏（0 和 0. [13] 到2016年，我国脱硫石膏总产量已达到5.5亿吨，其中相当一部分被废弃。 [14] 2016 年，在 PL 中添加 FGD 石膏可显着提高玉米产量 15%。 [15] FGD石膏在混合物中的添加量为水泥重量的4%、8%和12%。 [16] 然而，关于 FGD 石膏在农田中的长期影响的信息有限。 [17] 1质量％时，FGD石膏的软化系数为0。 [18] α-半水石膏（α-HH）的制备是实现脱硫石膏高值化利用的重要途径。 [19] 定量评价脱硫石膏对三维（3D）孔隙特征的影响，有助于了解脱硫石膏对钠质土壤的复垦机理。 [20]
flue gas desulfurization 烟气脱硫
The Se migration behavior in wet flue gas desulfurization (FGD) slurry is still unclear, and the species of Se in FGD gypsum remains controversial. [1] In this study, we measured the effects of flue gas desulfurization (FGD) gypsum, straw compost (SC), the SC mixed with FGD gypsum on site and the SC co-composted with FGD gypsum on soil properties, root nutrient uptake, shoot growth, crop yields and tomato quality under continuous saline water irrigation. [2] This research focused on the distribution and chemical speciation of Cr, Pb, Cd, Cu, Zn, and As in fly ash and flue gas desulfurization gypsum (FGD gypsum) from a large-scale pulverized coal-fired (PC) power plants in Anhui Province of eastern China. [3] The behavior of Pb, a toxic heavy metal that commonly exists in flue gas desulfurization (FGD) gypsum, requires a systematic study for FGD gypsum recycling. [4]湿法烟气脱硫（FGD）浆液中硒的迁移行为尚不清楚，脱硫石膏中硒的种类仍存在争议。 [1] 在这项研究中，我们测量了烟气脱硫（FGD）石膏、秸秆堆肥（SC）、SC与FGD石膏现场混合以及SC与FGD石膏共同堆肥对土壤性质、根系养分吸收、枝条生长的影响。 ，连续盐水灌溉下的作物产量和番茄品质。 [2] 本研究的重点是安徽某大型煤粉电厂粉煤灰和烟气脱硫石膏（FGD石膏）中Cr、Pb、Cd、Cu、Zn和As的分布和化学形态。中国东部省份。 [3] nan [4]
fgd gypsum application
Three FGD gypsum application methods (single-band, dual-band and blend applications) and a control treatment (non-FGD gypsum) were carried out using sodic soil in soil bins to investigate the effects of the application method on the wetting front, major cations in the leachate during the process of water infiltration and soluble and exchangeable cations in the soil profile after infiltration. [1] This study tested three rates of unincorporated, surface-broadcast FGD gypsum application at 23 field sites in Wisconsin. [2]三种 FGD 石膏施用方法（单波段、双波段和混合施用）和对照处理（非 FGD 石膏）在土壤箱中使用钠质土壤，以研究施用方法对湿润前沿的影响，主要水入渗过程中渗滤液中的阳离子和入渗后土壤剖面中的可溶性和可交换性阳离子。 [1] nan [2]