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  • Characterisation and removal of iron from fly ash of

    2001-1-1 · The NaHMP plays an important role in the separation of iron and aluminum oxide mixture (Prakash et al., 1999). Hence magnetic separation of fly ash with and without NaHMP at various magnetic intensities has been carried out and is shown in Figure 1. It can be seen that removal of iron oxide is better at 1.6 kg/t of NaHMP.

    Recovery of iron oxide from power plant fly ash by

    Removal of gangue materials, principally silica and alumina, from a magnetically-separated, iron-rich fraction of bituminous coal fly ash shows promise of yielding an iron ore grade concentrate. As separated, the iron-rich fraction contains 65 to 75 weight percent iron oxides or about 50% of the iron originally in the ash.

    Recovery of iron oxide from coal fly ash (Patent) DOE

    A high quality iron oxide concentrate, suitable as a feed for blast and electric reduction furnaces is recovered from pulverized coal fly ash. The magnetic portion of the fly ash is separated and treated with a hot strong alkali solution which dissolves most of the silica and alumina in the fly ash, leaving a solid residue and forming a

    Investigation of Removing Iron from Fly Ash

    Fly ash, as an environmental pollutant, is generated in the process of coal combustion for energy conversion. It has been widely used in so many applications, such as, preparation of zeolite, extracting alumina, and so on. Iron composition has some side-effect on the purity and whiteness of the products prepared form fly ash. In this paper, removal of unburned carbon and iron composition was

    Beneficiation of iron and aluminium oxides from fly

    2015-12-10 · The disposal of the large amount of fly ash has become a serious environmental problem. Since it has significant amounts of iron oxide (6–15%) and aluminium oxide (20–30%), it may find use in the extraction and production of aluminium and iron oxides, and subsequently in the recovery of aluminium and iron metals.

    Improving Fly Ash Brightness with Carbon and Iron

    In this paper, the brightness of fly ash is improved by carbon removal by heating and iron-containing oxides removal by acid treatment using a two-step method to realize the application of fly ash as filler or coating in the future, which not only increases the range of resource utilization of fly ash, but also reduces dust pollution. The modification results show that the brightness of fly

    Development of iron oxide and titania treated fly ash

    The increasing accumulation of fly ash from thermal power plants poses a major problem to the environment. The present work reflects the novel utilization of this profusely available industrial waste in the form of an antibacterial hard ceramic material by treating fly ash with ferric oxide (Fe2O3) and titania (TiO2) during sintering process at 1600 °C.

    Phosphate Ion Removal from Aqueous Solution Using an

    2018-2-12 · 603 *Author to whom all correspondence should be addressed.E-mail: [email protected] Phosphate Ion Removal from Aqueous Solution Using an Iron Oxide-coated Fly Ash Adsorbent Shuhua Yao, Jinyan Li and Zhongliang Shi* Department of Applied Chemistry, Shenyang Institute of Chemical Technology, Shenyang 110142, P. R. China.

    Chlorine removal from MSWI fly ash by thermal

    2020-2-1 · Subsequently, additives (iron/aluminum powder) were added into fly ash to promote the removal of chlorine so as to achieve a high chloride removal efficiency at relatively low temperature. Finally, the chlorine removal mechanism was discussed based on the removal behaviors of chlorides in fly ash. 1. Materials and methods1.1. Materials

    Synthesis of zeolite/hydrous metal oxide composites

    2016-3-10 · Synthesis of zeolite/aluminum oxide hydrate from coal fly ash: a new type of adsorbent for simultaneous removal of cationic and anionic pollutants Ind. Eng. Chem. Res.,52 ( 2013 ),pp. 14890

    Recovery of iron oxide from coal fly ash The United

    These and other objects of the invention for recovering iron oxide from pulverized, bituminous coal fly ash may be met by separating the magnetic portion from the nonmagnetic portion of the fly ash, contacting the magnetic fly ash with a strong alkali solution in a ratio of 200 to 300 gms fly ash per liter of solution, the solution containing

    A Novel Method of Using Iron Nanoparticles from

    2019-5-27 · Extraction of Iron Oxide from Coal Fly Ash. The extraction of Fe from CFA involved measuring 100 g of CFA into a plastic beaker, to which 200 mL of deionised water (conductivity = 0.055 μS/cm) was added. The slurry was initially mixed with a stirring rod, after which a magnetic stirring bar was used at a constant speed of 250 rpm for 30 min.

    Removal of radium from acidic solutions containing

    A high quality iron oxide concentrate, suitable as a feed for blast and electric reduction furnaces is recovered from pulverized coal fly ash. The magnetic portion of the fly ash is separated and treated with a hot strong alkali solution which dissolves most of the silica and alumina in the fly ash, leaving a solid residue and forming a

    CN104250015A Fly ash wet method iron removal

    The invention relates to a fly ash wet method iron removal process, and especially relates to an iron removal process in the production of aluminum hydroxide from fly ash. According to the fly ash wet method iron removal process, an aluminum sulfate solution is obtained by mixing materials, roasting, leaching, removing iron twice, and removing iron slag twice.

    Recovery of SiO₂ and Al₂O₃ from coal fly ash

    This study focussed on investigating the extraction of Si and Al from CFA. The investigation into the removal of the magnetic iron oxide content and calcium content from coal fly ash was also carried out to enhance the extraction of the Si and Al from CFA e.g. the removal of calcium was attempted to promote the leaching of aluminium from the ash.

    Flyash: an Effective Method for Treatment of Wastewater

    2019-7-1 · siliceous as consisting of oxides of silica, aluminium and iron and contains <10% calcium oxide. Fly ash has been regarded as a problematic solid waste all over the world. Effluents generated in dye houses of the textile industry contain considerable amounts of unexhausted (about 20 40%) of

    The Magnetic Fraction of Coal Fly Ash: Its Separation

    2020-2-29 · Chemical analysis shows that coal fly ash contains valuable metal constituents, the major ones being aluminum and iron. Figure 2 pre­ sents analytical information for fly ash recovered from bituminous coals mined in the United States (5,6). A typical fly ash will contain about 18 wt. percent iron oxide and about 20 wt. percent aluminum oxide.

    Phosphate Removal from Aqueous Solution Using Fly

    In this work the adsorption of phosphate using the Fe-Cu bimetal oxide modified fly ash was studied. The experimental results showed that phosphate could be effectively removed in the pH range between 4 and 10. The removal percentage of phosphate reached maximum at pH 6.0. The adsorption of phosphate by the modified fly ash was rapid, and the adsorption percentage of phosphate could reach 91

    Removal of cadmium from aqueous solutions using

    2018-2-14 · Fly ash and Bayer residue can successfully adsorb TOC, nutrients and Cu . Sorbents synthesized from coal fly ash and geopolymer are efficient for lead removal . However, coal fly ash removes heavy metal ions with low efficiency. Zerovalent iron nano particles have been investigated as a new material for the treatment of contaminated water.

    Hydrothermal synthesis of hydroxy sodalite from fly

    2016-9-26 · Zeolites are known to possess valuable physiochemical properties such as adsorption, cation exchange, molecular sieving, and catalysis. In addition, zeolites are highly selective scavengers of a variety of heavy metals from liquid effluents through the process of ion exchange. The present study was performed to hydrothermally synthesize Na8[AlSiO4]6(OH)2·2H2O (also known as hydroxy sodalite

    Article Fly ash waste recycling by Pt/TiO2 incorporation

    2021-3-3 · oxide (Al 2 O 3), iron oxide (Fe 2 O 3) and calcium oxide (CaO). Their physical, chemical, and min-eralogical properties suggest the opportunities for their use and disposal. A contextual approach, namely, the use of fly ash waste to develop effective solu-tions in the removal of industrial dyes, can help to reduce their negative effect on the

    Recovery of SiO₂ and Al₂O₃ from coal fly ash

    This study focussed on investigating the extraction of Si and Al from CFA. The investigation into the removal of the magnetic iron oxide content and calcium content from coal fly ash was also carried out to enhance the extraction of the Si and Al from CFA e.g. the removal of calcium was attempted to promote the leaching of aluminium from the ash.

    Synthesis of Zeolite from Fly Ash and Removal of Heavy

    2019-7-31 · Table 1 presents the physicochemical properties of the fly ash samples used in the pre-sent investigation. As can be seen from this table, the fly ash samples used were of ‘Class F’ type with SiO 2, Al 2O3 and iron oxide as the major constituents. Commercial 13X zeolite was

    Flyash: an Effective Method for Treatment of Wastewater

    2019-7-1 · siliceous as consisting of oxides of silica, aluminium and iron and contains <10% calcium oxide. Fly ash has been regarded as a problematic solid waste all over the world. Effluents generated in dye houses of the textile industry contain considerable amounts of unexhausted (about 20 40%) of

    The Magnetic Fraction of Coal Fly Ash: Its Separation

    2021-3-22 · Chemical analysis shows that coal fly ash contains valuable metal constituents, the major ones being aluminum and iron. Figure 2 pre­ sents analytical information for fly ash recovered from bituminous coals mined in the United States (5,6). A typical fly ash will contain about 18 wt. percent iron oxide and about 20 wt. percent aluminum oxide.

    Panel Bed Filters for Simultaneous Removal of Fly Ash and

    2018-6-17 · SO2 and fly ash in a single step. Candi-date solids for use in a panel for simul-taneous removal of these pollutants are the alkalized alumina developed by the U. S. Bureau of Mines and half-calcined dolomite,3 the former working at about 625°F ahead of the air pre-heater, and the latter at about 1000°-1100°F ahead of the economizer.

    Utilization of Fly ash for sustainable environment

    2020-6-26 · Depending on the concentration of calcium oxide, silica, alumina and iron oxide, fly ash is classified into two types: Class F and Class C (ASTM C618) [5] fly ash. Fly ash produced from the burning of anthracite and bituminous coal produces Class F fly ash whereas combustion of lignite or sub-bituminous coal produces Class C fly ash.

    Removal of Cadmium from Aqueous Streams by Zeolite

    2020-6-25 · and iron oxide as the major constituents. Different oxide concentrations of coal fly ash and zeolite were found using EDAX analysis. 2.3. Preparation of adsorbent material The composition of raw fly ash was Na 2 O-0.35%, MgO-2.4%, Al 2 O 3-26.76%, SiO 2-39.2%, CaO-23.75%, Fe 2 O 3-4.25% and TiO 2-3.25%. Raw fly ash samples were screened through

    Benzene Removal by Iron Oxide Nanoparticles

    In this paper, carbon nanotubes (CNTs) impregnated with iron oxide nanoparticles were employed for the removal of benzene from water. The adsorbents were characterized using scanning electron microscope, X-ray diffraction, BET surface area, and thermogravimetric analysis. Batch adsorption experiments were carried out to study the adsorptive removal of benzene and the effect of parameters such

    曾丹林 武汉科技大学 化学与化工学院 X-MOL

    Effect of surface properties of iron oxide sorbents on hydrogen sulfide removal from odor. Clean Soil, Air, Water, 2014, on line, DOI: 10.1002/clen.201300328. 6. Danlin Zeng*, Shenglan Liu, Wanjun Gong, Hongxiang Chen, Guanghui Wang. A nano-sized solid

    CN104250015A Fly ash wet method iron removal

    The invention relates to a fly ash wet method iron removal process, and especially relates to an iron removal process in the production of aluminum hydroxide from fly ash. According to the fly ash wet method iron removal process, an aluminum sulfate solution is obtained by mixing materials, roasting, leaching, removing iron twice, and removing iron slag twice.

    Reduction and removal of SO2 and NOx from

    Iron oxide supported on alumina is a promising catalyst/absorbent for use in the simultaneous removal of NO x and SO x from power plant stack gases. A dry-contacting process is under development which would operate under net reducing conditions at temperatures of 370° to 540°C.

    Synthesis of Zeolite from Fly Ash and Removal of Heavy

    2019-7-31 · Table 1 presents the physicochemical properties of the fly ash samples used in the pre-sent investigation. As can be seen from this table, the fly ash samples used were of ‘Class F’ type with SiO 2, Al 2O3 and iron oxide as the major constituents. Commercial 13X zeolite was

    Removal of NO from flue gases by absorption to an

    1994-5-12 · THE combustion of fossil fuels generates SO2 and NOX pollutants which cause acid rain and urban smog1. Existing flue-gas desulphurization scrubbers involve wet limestone processes which are

    Removal of Copper (II) Ions in Aqueous Solutions by

    2020-1-22 · Fly ash is a particulate material produced from coal combustion power plants that requires ultimate disposal. The major components of fly ash are silica, alumina, iron oxide, calcium oxide, magnesium oxide, and carbon which are ideal for metal adsorbents. The potential use of fly ash in the wastewater treatment process is obvious

    Removal of Cadmium from Aqueous Streams by Zeolite

    2020-6-25 · and iron oxide as the major constituents. Different oxide concentrations of coal fly ash and zeolite were found using EDAX analysis. 2.3. Preparation of adsorbent material The composition of raw fly ash was Na 2 O-0.35%, MgO-2.4%, Al 2 O 3-26.76%, SiO 2-39.2%, CaO-23.75%, Fe 2 O 3-4.25% and TiO 2-3.25%. Raw fly ash samples were screened through

    Use of Fly Ash as Adsorbent for Removal of Chromium

    2021-2-1 · Fly ash consists of silica, alumina, iron oxide, lime, magnesia and alkali in varying amounts with some unburned activated carbon (Dogan et al., 2006; Fan et al., 2001). The chemical compositions of fly ash are high percentage of Use of Fly Ash as Adsorbent for Removal of

    Removal of Malathion from Aqueous Solutions and Waste

    2013-12-24 · removal of pesticides, fly ash has advantage over others as it is basically a waste of thermal power plants and is recognized as a nuisance for environment and industry. In the present study removal of malathion from water has been taken up by batch adsorption technique using fly ash

    Fast removal and recovery of congo red by modified iron

    2012-8-12 · Fast removal and recovery of congo red by modified iron oxide magnetic nanoparticles H.Tavallali*, A. Daneshyar Department of Chemistry, Faculty of science, Islamic Azad University, Omidiyeh branch, Omidiyeh, IRAN *Corres.author: [email protected], Tel-fax: +98-711-6222284

    曾丹林 武汉科技大学 化学与化工学院 X-MOL

    Effect of surface properties of iron oxide sorbents on hydrogen sulfide removal from odor. Clean Soil, Air, Water, 2014, on line, DOI: 10.1002/clen.201300328. 6. Danlin Zeng*, Shenglan Liu, Wanjun Gong, Hongxiang Chen, Guanghui Wang. A nano-sized solid

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