Fly ash of Megalopolis and ferroalumina in the production of building materials

Zaravelis, F.; Theodorakis, Nikolaos; Triantafyllou, Athanasios G.; Stivanakis, V.

doi:10.1016/j.matpr.2018.09.061

Cited by 3 publications

(2 citation statements)

References 2 publications

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“…As the world's largest supplier and exporter of raw materials, wastewater treatment in the pharmaceutical industry is one of the most important industries that meet national environmental safety requirements. Under the global chemical industry cluster development culture, in order to conform to the new pattern of international industrial development and increase the growth of the industrial chain, the construction of park clusters is a new model for the development of the national chemical industry [14]. e concentration of pollutants is high, COD can reach tens of thousands of milligrams per liter, and the toxicity is high.…”

Section: Water Pollution and Treatment Methodsmentioning

confidence: 99%

Treatment of Comprehensive Wastewater from Chemical and Pharmaceutical Parks by Fly Ash-Coated Iron Electrode Electrocoagulation

Zhu

Chen

2022

Advances in Materials Science and Engineering

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With the rapid development of the economic system and the continuous development of industry, environmental pollution is becoming more and more important, so wastewater treatment urgently needs to be strengthened. This article uses fly ash-coated iron electrode electrocoagulation method to carry out experimental tests on the treatment of comprehensive wastewater from chemical and pharmaceutical parks. Fly ash is used as a raw material to prepare a shaped adsorbent; in order to analyze whether the adsorbent has many potential applications in actual wastewater treatment and use. The experiment research of iron electrode electrocoagulation was carried out on actual groundwater, aiming to provide data and theoretical support for the utilization of fly ash and the optimization of comprehensive wastewater treatment technology. The article mainly conducts related research on title distribution, firstly the physical and chemical properties of fly ash, and secondly, discusses the related structure of electrocoagulation method, and solves the problem of comprehensive wastewater based on the combination of the two solving issues. Aware of the importance of sewage treatment and the characteristics of related treatment methods such as adsorption, membrane separation technology, and ion exchange, the advantages of these methods are also used for reference in subsequent experiments to achieve the purpose of reliable experimental results. The experimental results show that the effect of sewage treatment with fly ash with different average diameter particles is obvious. Among them, the maximum value of vibration grinding ash before and after application increased from 5.62 to 8.31, and the maximum removal rate is also 8.31; the removal effect is significant. It can be seen that the fly ash-coated iron electrode electrocoagulation method can have a great effect on the treatment of comprehensive wastewater in the chemical and pharmaceutical park.

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Section: Water Pollution and Treatment Methodsmentioning

confidence: 99%

Treatment of Comprehensive Wastewater from Chemical and Pharmaceutical Parks by Fly Ash-Coated Iron Electrode Electrocoagulation

Zhu

Chen

2022

Advances in Materials Science and Engineering

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“…The generation of electricity in Greece mainly depends (~73%) on the combustion of local lignite, while the most important lignite centers in the country are Ptolemais-Amynteon and Megalopolis, which are located in West Macedonia and Peloponnese regions, respectively. Annually, the electricity generation power plants in Greece burn approximately 64 million tons of lignite and produce nearly 13 million tons of FA [3].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Zeolites from Greek Fly Ash and Assessment of Their Copper Removal Capacity

2020

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The objective of this study was to synthesize zeolites through fusion of lignite fly ash and NaOH or KOH pellets at 600 °C and assess their removal efficiency in terms of decontamination of solutions containing Cu(II) ions. The removal efficiency of the produced zeolites was tested in batch kinetic experiments using different zeolites and Cu(II) ion concentrations. Experimental data revealed that zeolites synthesized with the use of NaOH exhibited higher removal efficiency compared with those synthesized with the use of KOH. Kinetic data showed that the pseudo-second-order equations described well the removal process. Copper removal was mainly accomplished through the concerted action of chemisorption and intraparticle diffusion. Analytical techniques involving XRF, XRD, FTIR, SEM/EDS and XPS were used for the characterization and morphology analysis of the produced zeolites. SEM/EDS confirmed the presence of copper on the zeolite surface. XPS spectra of Cu2p at 934.3 eV proved the presence of Cu(II) oxidation state, confirming the possible formation of CuO and/or Cu-Cl.

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Utilization of Ash From the Combustion of Kuznetsk and Ekibastuz Coals

Delitsyn,

Sulman,

Kulumbegov

et al. 2024

SGEM International Multidisciplinary Scientific GeoConference� EXPO Proceedings

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One of the promising areas of utilization of solid technogenic waste from energy generation is their processing to produce alumina, the production of which is accompanied by the formation of by-products that can be used to produce belite sludge (2CaO�SiO2). The basic schemes of purification of the initial ash from carbon and iron oxides are proposed. Using the example of ash from coal burning in the Ekibastuz basin, the possibility of obtaining two grades of belite sludge is shown. Up to 1.5-1.8 tons of belite sludge can be obtained per ton of recycled ash (depending on its quality), which can be used in cement production. The article presents the results of experimental studies aimed at developing a technology for producing belite sludge from high-alumina ash from coal-fired power plants. The influence of various technological parameters on the process of obtaining the target product has been studied. A solution of sodium silicate with the extraction of 28% silica into it was obtained by the method of alkaline desilination of ash. The possibility of obtaining a white, high-quality belite sludge suitable for the production of white cement by treating a solution of sodium silicate with calcium oxide is shown. At the second stage, during the processing of alumina concentrate, gray belite sludge was obtained suitable for use in the construction industry

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Fly ash of Megalopolis and ferroalumina in the production of building materials

Cited by 3 publications

References 2 publications

Treatment of Comprehensive Wastewater from Chemical and Pharmaceutical Parks by Fly Ash-Coated Iron Electrode Electrocoagulation

Treatment of Comprehensive Wastewater from Chemical and Pharmaceutical Parks by Fly Ash-Coated Iron Electrode Electrocoagulation

Synthesis of Zeolites from Greek Fly Ash and Assessment of Their Copper Removal Capacity

Utilization of Ash From the Combustion of Kuznetsk and Ekibastuz Coals

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