A Review on the Utilization and Environmental Concerns of Coal Fly Ash
Also, fly ash utilization should be monitored for radon gas inhalation, particularly in building and construction practices, and potassium, thorium, and radium for soil and crop contamination. Another environmental concern is the pollution of gases such as COX, NOx, SOx, and particulate matter during coal combustion.
Removal of As(V) and As(III) species from wastewater by …
bKey Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology ... environmental hazards and realize high-value utilization of coal fly ash, it was characterized using the scanning electron microscopy, Brunauer–Emmet–Teller, and powder X-ray diffraction methods, ... (III) on fly ash could be due to the ...
Synergetic benefits of pollution and carbon reduction from fly ash …
Request PDF | Synergetic benefits of pollution and carbon reduction from fly ash resource utilization—Based on the life cycle perspective | Synergetic reduction of pollution and carbon is a key ...
Synergetic benefits of pollution and carbon reduction from …
The scenario-based LCA results show that fly ash/bottom ash utilization can lower the SO2 load of untreated flue gas by 3.7–4.7% before an existing wet limestone …
Progress and Prospect of Research on Comprehensive Utilization of Fly Ash
3. 4. Fly ash is a kind of solid waste produced after coal combustion. After a long period of accumulation, it takes up a lot of land resources and causes serious environmental pollution problems. The comprehensive utilization of fly ash resources is becoming more and more important. The paper introduces the physicochemical properties and ...
Utilization and Disposal of Fly Ash and Other Coal …
Since coal residues contain potentially hazardous substances, improper handling and disposal could cause undesirable environmental effects. This report intends to summarize impacts of land-oriented …
Utilization of Fly Ash in Wastewater Treatment: A Review
Class C fly ashes contain more calcium (as CaO) than Class F fly ashes, according to ASTM. Class C fly ash includes more than 15% CaO, and Class F fly ash contains less than 5% CaO. When anthracite or bituminous coal is burned, Class F fly ash is usually produced. This fly ash has pozzolanic properties.
Fly ash toxicity, emerging issues and possible implications …
The Utilization of fly ash has increased from 8% in 1997 to 70% in the year 2010. Apart from this 40% of the fly ash is still unused (Fig. 1) (Surabhi, 2017). ... (Delbergia sissoo) helped in restoring the ecology in a sustainable manner (Ram, 2009). As fly ash possesses many properties similar to gypsum and lime it can be utilized for sodic ...
Examining the endpoint impacts, challenges, and opportunities of fly
The aim of this work is to (1) quantify the impacts/benefits of fly ash utilization on human health, ecosystem, and resources, (2) explore the challenges that impede waste utilization in the ...
The Research Status and Progress on the Utilization of Coal Fly Ash…
With the intensified coal consumption, the coal fly ash (CFA) is an industrial by-product produced in the thermal power plant; it has an alumina (Al 2 O 3) content that ranges between 20 and 50% and is comparable to mid or low-grade bauxite ores [1,2,3].A major percentage of the total CFA production is used in construction, paving, filling, and …
Utilization of fly ash waste as construction material
Fly ash is characterized as one of the residue s created in burning chamber from the coal. in electrical power plant, and contai ns the fine particles that rise with the flue gases. Fly ash is a ...
Comprehensive Utilization of Fly Ash
fly ash with Ca content <10% is called low calcium fly ash; fly ash with Ca content at 10–20% is intermediate calcium fly ash; and that with Ca content >20% is called high calcium fly ash [7]. Fly ash includes strong cementitious ash (15 min internal condensation), intermediate cementitious ash (60 min internal condensation), and
Ecological restoration of fly‐ash disposal areas: Challenges …
FA dumps not only create air, water, and soil pollution but also pose a noxious impact on human health by introducing toxins in the food chain through biomagnification. A non-food vegetation cover can help to mitigate FA dump-related environmental health issues. However, alkaline pH, toxic metals, lack of soil microbes, …
CHARACTERIZATION AND UTILIZATION OF FLY ASH
2.5. Utilization of Fly Ash 19 2.5.1. Fly Ash in Portland cement Concrete 19 2.5.2. Fly Ash in Stabilized Base Course 20 2.5.3. Fly Ash in Flowable Fill 21 2.5.4. Fly Ash in Structural Fills/Embankments 22 2.5.5. Fly Ash in Soil Improvement 23 2.5.6. Use of fly ash for treatment of Acid Mine Drainage 24 2.5.7. Developments in Fly Ash ...
Ecological restoration of fly-ash disposal areas: Challenges …
Fly ash is a prominent environmental by-product or residue that is produced during the combustion of coal for energy production in thermal power plant. The huge amount of fly ash generation is a ...
Synergetic benefits of pollution and carbon reduction from …
The results confirm the possibility of fly ash resource utilization for synergetic pollution and carbon reduction and demonstrate the synergetic emission reduction potential of the solid waste resource utilization supply chain.
Fly Ash Characteristics
Either fresh or carbonated fly ashes added trace elements such as B, Fe, Mn, Zn, Cu, Cd, Mo, Cr, Pb and Ni into the soil which significantly enhanced the plant growth and yield compared to fly ash ...
Fly Ash and Its Utilization in Indian Agriculture: Constraints …
Fly ash has the potential to alter soil ecology, water and air causing serious pollution. Moreover, fly ash particles cause corrosion of surfaces and its inhalation causes respiratory problems in human beings. Further, Indian coal has 35–38% ash content which is significantly higher in comparison to the 10–15% ash content of imported coal ...
Impacts of fly-ash on soil and plant responses
The coal fly ash has a great impact on agriculture due to its efficacy in the modification of soil health and crop performance by altering soil properties like bulk density, soil texture, water ...
Synergetic benefits of pollution and carbon reduction from fly ash …
Fly ash accumulation occupies land resources largely and causes a certain degree of pollution to the soil, atmosphere, and water environments. Therefore, it is meaningful to research the resource utilization of fly ash. If the synergetic effect of solid waste resource utilization represented by fly ash is proven, it will not only contribute to ...
A Review of Coal Fly Ash Utilization to Save the Environment
The quality of Indian coal is lo w and contains. ash ranging from 35 to 50% (Khadse et al., 2007). It also shows high mineral contains high moisture, low sulphur, and low calorific values ranging ...
A comprehensive review on the applications of coal fly ash
1. Introduction. Coal fly ash, a by-product of coal combustion in thermal power plants, is one of the most complex and abundant of anthropogenic materials. If not properly disposed of, it can cause water and soil pollution, disrupt ecological cycles and pose environmental hazards. More aggressive efforts have been undertaken recently to …
Optimization of preparation of NaA zeolite from fly ash for CO
The green synthesis method of fly ash-based NaA zeolite was explored to reduce the synthesis cost and environmental hazards. For the prepared NaA samples, the effects of crystallization time, solid-liquid ratio, and Si/Al ratio were systematically studied. CO2 adsorption isotherm is used for adsorption model fitting analysis and adsorption …
REVIEW ON PRODUCTION AND UTILIZATION OF FLY ASH: …
The present study begins with focusing on the importance of coal in the Indian energy sector and discuss the status of fly ash generation and utilization throughout the years. ... it poses a serious threat to ecology and the environment. ... Plants and Their Interaction to Environmental Pollution, Elsevier, 2023, Pages 109-123. …
Ecological restoration of fly-ash disposal areas: Challenges …
The fly ash dumps not only creates air, water, and soil pollution but also poses noxious impact on human health by introducing toxins in food chain through …
Resource utilization of solid waste for the
The findings in Section 4.2 show that the regions with low fly-ash utilization rates and the economically developed regions with nearly fly-ash utilization rates suffer from the single use of fly ash and the low added value of resource utilization products. Fly ash is used for producing building materials, whereas its use for high-value ...
A review on the utilization of fly ash
Fly ash can be considered as the world's fifth largest raw material resource [2]. An estimated 25% of fly ash in India is used for cement production, construction of roads and brick manufacture [3]. The fly ash …
The Resource Utilization and Environmental Assessment of MSWI Fly Ash
In the hydrothermal treatment of MSWI fly ash, high quality zeolites with a large specific surface area and porosity could be synthesized and be utilized as resources in various applications, such as degradation of organic pollution and adsorption of heavy metal ions [149, 151], etc. Zeolite NaP1, synthesized by Chen et al. from MSWI fly ash ...
Ministry of Environment, Forest and Climate Change
2.0 Status of fly ash utilisation: Since 1999 when flyash utilisation was made mandatory, the utilization of fly ash has increased from 6.64 million-ton in 1996-97 to 147.7 million-ton in 2017-18. Fly ash generation and utilization in 2017-18 from 182 coal/lignite based TPPs of various power utilities in the country was 220.7
A Review of Coal Fly Ash Utilization to Save the Environment
Fly ash powder affects the environment, but it has a different direct impact on the human body. Figure 5 summarizes the effects of fly ash powder on the environment and the human body. The figure shows that due to rain in the landfill and ash ponds leads to the leaching of various toxic metals such as lead, cadmium, arsenic, mercury, etc., …