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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 27 for “"coal fly ash"”.
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The Decomposition of Polycyclic Organic Matter Adsorbed on Coal Fly Ash
Made available in DSpace on 2014-12-13T20:10:32Z (GMT). No. of bitstreams: 1 7913518.pdf: 7060176 bytes, checksum: e641f48031d33784c2f32c9c52265903 (MD5) Previous issue date: 1978
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Quantification of the bioccumulation potential of various chemical elements from coal fly ash using Brassia juncea and Spinacia oleracea L and its implication for phytoremediation of coal fly ash dumps
South Africa is highly dependent on coal for production of electricity. The combustion of coal for electricity generation produces waste by-products which include fine ash (fly ash) and coarse ash. Fly ash (FA) is produced in large amounts while its utilization is low due to its classification as a …
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Hydrothermal synthesis and optimisation of zeolite Na-P1 from South African coal fly ash
Millions of tonnes of fly ash are generated worldwide every year to satisfy the large demand for energy. Management of this fly ash has been a concern and various approaches for its beneficial use have been investigated. Over the last two decades, there has been intensive research internationally …
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Optimization of Microwave-Assisted Acid Digestion Method for Determination of Trace Elements in Coal and Coal Fly Ash
… for analysis of trace metal elements present in coal and coal combustion products. This method requires use of liquid samples, so all coal and coal combustion products must be digested prior to analysis by ICP. Traditionally an open-air hot-plate acid digestion method published as ASTM D6357-04 …
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Application of phosphate and surfactant-modified zeolite for remediation/attenuation of trace elements in soil and coal fly ash
… trace element contamination sourced by coal fly ash and arsenic trioxide herbicide. Both alkaline and acidic fly ash samples were found to contain significant concentrations of environmentally available trace elements. The treatment of fly ash leachate with surfactant-modified zeolite …
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Biomass and Coal Fly Ash in Concrete: Strength, Durability, Microstructure, Quantitative Kinetics of Pozzolanic Reaction and Alkali Silica Reaction Investigations.
… sustainable energy resource, with biomass-coal cofiring representing among the most effective and cost efficient CO2 reduction strategies. Fly ash generated during coal combustion represents a technically advantageous, inexpensive, and environmentally beneficial admixture in concrete …
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Predictive Modeling and Durability Analysis of Low Carbon Concrete Incorporating Recycled Materials
… the use of recycled concrete aggregate (RCA), coal ash (CA), and quarry by-products (QB) as the substitute materials to produce cementitious composites using a hybrid approach of machine learning meta-analyses combined with experimental verification. In the first half of the dissertation, a …
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Geochemical Investigations of Respirable Particulate Matter
… of As and Cr was determined from a sample of coal fly ash from an eastern U.S. power plant. The time-release profiles of As and Cr were determined for these materials in physiologically-based solvents and incorporated into a toxicokinetic model to predict the exposure potential to As and Cr …
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Response of the maize genome to external and cellular environments
… kernels with the fungicide captan and by adding coal fly ash and fly ash leachate to the soil. The cellular environment was investigated by observing differences in the structure and function of genomes of hybrids as compared to inbred lines.
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Aqueous reactivity of glassy industrial byproducts in alternative cementitious systems
… and IBs such as blast furnace slag and coal fly ash as supplementary and alternative cementitious precursors.
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A Study of the Effect of the Extraction Procedure in the Analysis of Organic Compounds Adsorbed on Coal Ash
The organic compounds found adsorbed on coal fly ash have been a cause for concern since the early days of the industrial revolution. A vast majority of the compounds reported as being adsorbed on the ash are polyaromatic hydrocarbons (PAHs). This study represents an attempt to evaluate the …
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Arsenic and Selenium Distribution in Coal-Fired Plant Samples
Arsenic and selenium distributions in coal-fired plant samples are studied. This research includes arsenic and selenium concentrations in samples of coal, fly ash, bottom ash, economizer ash, Flue Gas Desulfurization (FGD) slurry and flue gas taken from four power plants with the goal being to …
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Preparation and Evaluation of Sulfur -Containing Adsorbents for Removal of Mercury From Simulated Coal Combustion Flue Gases
… of trace amounts of Hg0 and HgCl2 from simulated coal combustion flue gases. These adsorbents include coal-derived activated carbons (CDACs), activated carbon fibers (ACFs), coal fly ash, pistachio shell char (PSC), pistachio activated carbon (PAC), and zeolite adsorbents. Selected samples were …
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Development of Methods for the Determination of Major and Minor Elements and Hydrocarbon Residues in Solid Combustion Products
… the determination of inorganic constituents in coal fly ash by glow discharge spectrometry (GDS) and for the extraction of the organic compounds from coal and ash by supercritical fluid extraction (SFE) at temperatures below 150°C are reviewed. The inorganic elements studied included Al, Ca, C, …
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Color Removal From Pulp Mill Effluent Using Coal Ash Produced From Georgia Power Coal Combustion Plants
… environmental concerns currently face Georgia: coal fly ash (CFA) waste from coal power plants, and the effluent generated by pulp mills. Pulp mill effluent discolors surface waters into which it is discharged, and has been proven to negatively impact the dissolved oxygen and carbon necessary …
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Study on preparation of high performance CaO-MgO-Al2O3-SiO2 system glass-ceramic with industrial by-products
… furnace slag (BFS), iron ore tailings (IOT), and coal fly ash (CFA) are common industrial by-products with huge annual yield and low reuse rate (< 30%). This research was intended to prepare high performance glass-ceramics from these three industrial by-products. What's more, two energy saving …
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Contributions to predicting contaminant leaching from secondary materials used in roads
<p>Slags, coal ashes, and other secondary materials can be used in road construction. Both traditional and secondary materials used in roads may contain contaminants that may leach and pollute the groundwater. The goal of this research was to further the understanding of leaching and transport of …
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Utilization of municipal solid waste incinerator fly ash in cement mortars
… the potential of different types of MSWI fly ash from an incineration facility to be used in cement mortars by using existing standard test methods for cement and coal fly ash. Two types of MSWI fly ash samples: chemically treated and untreated fly ashes, were used. The treated fly ash was …
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Engineering functional biomaterials to advance environmental and resource sustainability
… and concentrated REEs from the leachate of coal fly ash and geothermal brine. Finally, we developed a renewable surface-displayed phytase biocatalyst for efficient phosphate conversion and recovery from biorefinery waste streams. This biocatalyst exhibited high activity, storage stability, …
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