scholarly journals Influence of Flue Gas Desulfurization Gypsum on Phosphorus Loss from a Horticultural Growth Medium

Horticulturae ◽  
2021 ◽  
Vol 7 (7) ◽  
pp. 199
Author(s):  
Dexter Brown Watts ◽  
George Brett Runion ◽  
Henry Allen Torbert
Keyword(s):  
Growth Medium ◽  
Flue Gas ◽  
Best Management Practices ◽  
Control Release ◽  
Nutrient Loss ◽  
Flue Gas Desulfurization ◽  
Fgd Gypsum ◽  
P Leaching ◽  
Concentration Loss ◽  
Fast Release

In response to agriculture’s contribution to surface water quality, considerable effort is being made to develop best management practices to reduce nutrient loss. To evaluate the efficacy of gypsum as a horticultural media amendment for controlling phosphorus (P) leaching, flue gas desulfurization (FGD) gypsum was added to a standard horticultural growth medium at 0, 2.5, 5, 10 or 15% (v/v). FGD gypsum was either mixed with the growing medium or placed at the bottom of the containers. A fast-release or a control-release fertilizer was top-dressed to containers. The greatest P leaching occurred with the fertilizer-only treatments (no gypsum). Dissolved reactive P (DRP) losses were highest on the initial day of measurement for the fast-release fertilizer and then decreased rapidly. There was a delayed release of DRP from the controlled-release fertilizer. Increasing rates of FGD gypsum addition resulted in decreasing DRP leaching concentration loss and load. The FGD gypsum decreased leachate DRP concentration loss by a maximum of 75%, with an average decrease of 46%. Mixing the FGD gypsum with the medium (an easier/less expensive means of incorporation) was most effective with the fast-release fertilizer. These preliminary results indicate that less gypsum may be needed to reduce P loss from fast-released fertilizer as opposed to control-release fertilizer. FGD gypsum remained effective in reducing DRP loss throughout the experiment.

scholarly journals THE INFLUENCE OF THE USE OF RECYCLED GYPSUM ON THE PROPERTIES OF GYPSUM PRODUCTS IN LABOR CONDITIONS

2020 ◽  
Vol 26 ◽  
pp. 81-85
Author(s):  
Hana Sekavová ◽  
Jakub Herrmann ◽  
Zdeněk Prošek ◽  
Miroslav Nyč ◽  
George Karra’a
Keyword(s):  
Flue Gas ◽  
Flue Gas Desulfurization ◽  
Volume Changes ◽  
Fgd Gypsum ◽  
Labor Conditions ◽  
Setting Times ◽  
Elasticity Module ◽  
First Results ◽  
Recycled Gypsum ◽  
Recycled Material

The article presents the first results from research, which is deal with recycling of plaster boards and use of the resulting material. The research is carried out within the project MPO Trio c. FV30359 “Recyklace sádrokartonových desek a nová materiálová využití s pridanou hodnotou – GIPSRec”. The plasterboards are produced of stucco, which is calcinated of Flue Gas Desulfurization Gypsum (FGD Gypsum). There is possibility to replace a part of this stucco with recycled material. There is opportunity for saving costs for production. The question how this utilization can change the properties of the products is very important and it is necessary to find the possible improvement or deterioration. This is the objective of this research. The effect on properties was monitored on the samples which was prepared of only pure stucco and of stucco with part of recycled material. There was observed water ratio (splash test), setting times, volume changes, flexural strength, compressive strength and elasticity module.

scholarly journals Enhanced Cd(II) Uptake by the Bassanite Phase Contained in Waste Calcite Produced via the Carbonation of Flue Gas Desulfurization (FGD) Gypsum

2011 ◽  
Vol 52 (6) ◽  
pp. 1303-1307
Author(s):  
Kyungsun Song ◽  
Young-Nam Jang ◽  
Jun-Hwan Bang ◽  
Soo-Chun Chae ◽  
Wonbaek Kim
Keyword(s):  
Flue Gas ◽  
Flue Gas Desulfurization ◽  
Fgd Gypsum

scholarly journals Effects of Fluorogypsum and Flue-Gas Desulfurization Gypsum on the Hydration and Hardened Properties of Alkali Slag Cement

Crystals ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1475
Author(s):  
Cheng Wang ◽  
Hang He ◽  
Yuli Wang ◽  
Wenyue Xue
Keyword(s):  
Flue Gas ◽  
Setting Time ◽  
Control Sample ◽  
Heat Of Hydration ◽  
Flue Gas Desulfurization ◽  
Slag Cement ◽  
Fgd Gypsum ◽  
Gypsum Content ◽  
Waste Gypsum ◽  
The Difference

In order to explore the influence of the types of waste gypsum on the properties of alkali slag cement, fluorogypsum (FG) and flue-gas desulfurization (FGD) gypsum were comparatively investigated. Moreover, the action mechanisms of FG and FGD gypsum on the properties of alkali slag cement were analyzed. The results show that both the FG and FGD gypsum prolonged the setting time of the alkali slag cement paste. However, the prolongation effect of FG was more pronounced than the FGD gypsum. When the compressive strength was maximum, the contents of FG and FGD gypsum were 5 and 6 wt.%, respectively. At 3 and 28 days, compared to the control sample, the compressive strengths increased by 59.3% and 24.3%, and 66.9% and 33.9%, respectively. Furthermore, the XRD, TG-DTA and SEM-EDS results showed that, with the increase in the contents of FG and FGD gypsum, ettringite was more easily produced and the hydration products were more abundant in the system. The greater the gypsum content of the paste, the less accumulated was the heat of hydration. The change of micro-structure caused by the formation of ettringite was the main reason for the difference in the properties of cement.

PHYSICAL PROPERTIES AND ENVIRONMENTAL PERFORMANCE OF STEAM-CURED CONCRETE CONTAINING FLUE-GAS DESULFURIZATION GYPSUM

2021 ◽  
Vol 16 (1) ◽  
pp. 3-15
Author(s):  
Hongseok Jang ◽  
Seungyoung So
Keyword(s):  
Physical Properties ◽  
Flue Gas ◽  
Environmental Performance ◽  
Cementitious Materials ◽  
Flue Gas Desulfurization ◽  
Test Results ◽  
Fgd Gypsum ◽  
Environmental Test ◽  
Environmentally Safe ◽  
Increased Strength

ABSTRACT Flue-gas desulfurization (FGD) gypsum has occasionally been used as an additive to cement. Consequently, appropriate facilities are required to ensure the environmentally safe processing of FGD gypsum and the resulting cement material properties. Such facilities are yet to be developed because the amount of FGD gypsum used is still small when compared with the vast amounts of FGD gypsum generated. In this study, we analyze the effect of FGD gypsum addition on the physical properties, stabilization, and radon count of steam-cured mortar and compare its performance with air-cured mortar. Our results show that the steam-cured pozzolanic hydration products of ettringite and C-S-H promote the densification of the mortar structure, thereby resulting in nanopore size reduction and increased strength of FGD gypsum mortar subsequent to the steam-cured hydration process. Further, our environmental test results indicate that steam-cured pozzolanic materials composed of FGD gypsum are environmentally safer than air-cured cementitious materials.

Remediating oxytetracycline-contaminated aquaculture water using nano calcium peroxide (nCaO2) produced from flue gas desulfurization (FGD) gypsum

2021 ◽  
pp. 101861
Author(s):  
Piyarat Vijuksungsith ◽  
Tunlawit Satapanajaru ◽  
Chanat Chokejaroenrat ◽  
Chalor Jarusutthirak ◽  
Chainarong Sakulthaew ◽  
...  
Keyword(s):  
Flue Gas ◽  
Flue Gas Desulfurization ◽  
Calcium Peroxide ◽  
Fgd Gypsum ◽  
Aquaculture Water

scholarly journals Fertilization efficiency of wood ash pellets amended by gypsum and superphosphate in the ryegrass growth    

2017 ◽  
Vol 63 (No. 2) ◽  
pp. 47-54 ◽  
Author(s):  
Ochecová Pavla ◽  
Mercl Filip ◽  
Košnář Zdeněk ◽  
Tlustoš Pavel
Keyword(s):  
Flue Gas ◽  
Plant Biomass ◽  
Wood Ash ◽  
Flue Gas Desulfurization ◽  
Biomass Ash ◽  
Single Superphosphate ◽  
Fgd Gypsum ◽  
Soil Enrichment ◽  
P Content ◽  
Uptake Of Nutrients

Application of biomass ash to soil can save mineral nutrients due to its relatively high contents of Ca, K, and P. The study assessed the effect of powdered ash and pellets made from wood fly ash (WFA), combined moreover with additives rich in S (flue gas desulfurization gypsum – FGDG) and P (single superphosphate – SP) on the yield and uptake of nutrients (Ca, K, P, and S) by ryegrass (Lolium perenne L.), the accumulation of nutrients in plant biomass at individual four cuttings, and the available nutrients amount in the acidic loamy soil after the last harvest. Plants grown in pots enriched by wood ash showed significantly higher yield and nutrient uptake than in the unamended treatments. The uptake of nutrients by plants, content of nutrients in plants and in soil was substantially positively influenced by both components added to the wood ash, especially by FGD gypsum. The combination of wood ash with additives proved to be effective. The soil enrichment by WFA + SP + FGDG increased the availability of SP-contained P and available P content in soil even after harvest.  

Study on Preparation of High Strength Gypsum by Flue Gas Desulfurization Gypsum

2013 ◽  
Vol 405-408 ◽  
pp. 2681-2685
Author(s):  
Ji Xiu Zhang ◽  
Peng Xuan Duan ◽  
Ye Zhang
Keyword(s):  
Thermal Expansion ◽  
Power Plant ◽  
Product Development ◽  
Flue Gas ◽  
Thermal Power Plant ◽  
Thermal Power ◽  
High Strength ◽  
Flue Gas Desulfurization ◽  
Test Results ◽  
Fgd Gypsum

In this paper, the flue gas desulfurization gypsum (FGD) generated from thermal power plant is used to produce high strength gypsum. The basic properties of super high strength gypsum prepared by FGD gypsum are investigated based on the test results of strength, thermal expansion rate, crystal appearance and size. The results indicate that the properties of high strength gypsum prepared by FGD gypsum above α50 standard. This can be a reference for gypsum-based α super high-strength gypsum related product development.

On Experimental Study of Development Calcined Gypsum from Flue Gas Desulfurization by Microwave Technology

2013 ◽  
Vol 368-370 ◽  
pp. 780-784 ◽  
Author(s):  
Zhi Man Zhao ◽  
Chun Jie Wang ◽  
Can Qion Li ◽  
Xiao Mei Zhang
Keyword(s):  
Microwave Irradiation ◽  
Flue Gas ◽  
Calcium Sulfate ◽  
Setting Time ◽  
Flue Gas Desulfurization ◽  
Crystal Formation ◽  
Special Effect ◽  
Fgd Gypsum ◽  
Calcined Gypsum ◽  
Cylindrical Crystal

Flue gas desulfurization gypsum (FGD gypsum) was irradiated with microwave, it could be changed calcined gypsum from flue gas desulfurization (CGD). The microwave respectively irradiated five groups FGD gypsum at 100-110°C, 110-120°C, 120-130°C, 130-140°C and 140-150°C, then the fineness and setting time were respectively measured, and compressive/flexural strength were also determined after 2 hours. Experiments show that, CaSO4·0.5H2O crystal of CGD would be more quantity and bigger volume with irradiation temperature increasing. The reason was considered that there were special effect of microwave irradiation to calcium sulfate crystalsthat by scanning electron microscope, and found the Ca, S, O and other elements in cylindrical crystal by Edax. The formation mechanism of CaSO4·0.5H2O crystal by microwave irradiation is different from traditional CaSO4·0.5H2O crystal formation theories.

scholarly journals Quantifying Environmental Burdens of Plasters Based on Natural vs. Flue Gas Desulfurization (FGD) Gypsum

2021 ◽  
Vol 13 (8) ◽  
pp. 4298
Author(s):  
Edyta Baran ◽  
Sebastian Czernik ◽  
Mariusz Hynowski ◽  
Bartosz Michałowski ◽  
Michał Piasecki ◽  
...  
Keyword(s):  
Environmental Impact ◽  
Flue Gas ◽  
Building Materials ◽  
Construction Materials ◽  
Primary Energy ◽  
Environmental Indicators ◽  
Energy Resources ◽  
Flue Gas Desulfurization ◽  
Fgd Gypsum ◽  
Depletion Potential

The ongoing global climate change and the associated environmental degradation pose a threat to Europe and the rest of the world. Raw materials and energy are required to produce building materials, which are used for construction purposes. Resulting buildings and structures generate waste during construction, operation, and demolition, and they emit potentially harmful substances. Thus, the key to achieving climate goals is to support low-emission materials and technologies in the construction sector, significantly impacting the environment. In the European Union, building materials are not yet subject to mandatory sustainability assessment during the assessment and verification of constancy of performance (AVCP). Objective evaluation of construction materials’ environmental impact requires it to be carried out based on production data on an industrial scale. This article presents the environmental impact of premixed gypsum-based plasters, commonly used in modern construction. Nine environmental indicators (global warming potential (GWP), depletion potential of the stratospheric ozone layer (ODP), acidification potential (AP), eutrophication potential (EP), formation potential of tropospheric ozone (POCP), abiotic depletion potential (ADP)-elements, ADP-fossil fuels, renewable primary energy resources (PERT), and nonrenewable primary energy resources (PERNT)) of premixed gypsum plasters based on natural and flue gas desulfurization (FGD) gypsum were estimated and discussed. Knowledge of the construction products’ environmental impact is fundamental for creating reliable databases. AVCP of construction materials in the future will use the data collected during the voluntary environmental impact evaluation.

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