4.6 Review

Emerging trends in the recovery of ferrospheres and plerospheres from coal fly ash waste and their emerging applications in environmental cleanup

Related references

Note: Only part of the references are listed.
Article Green & Sustainable Science & Technology

Synthesis of Floral-Shaped Nanosilica from Coal Fly Ash and Its Application for the Remediation of Heavy Metals from Fly Ash Aqueous Solutions

Virendra Kumar Yadav et al.

Summary: A large amount of coal fly ash is dumped in fly ash ponds every year, which leads to water pollution due to the presence of toxic heavy metals. Synthesizing silica nanoparticles from coal fly ash and using them for heavy metal removal is an economical and efficient approach. Researchers successfully synthesized nanosilica from coal fly ash and achieved 40-90% removal of heavy metals from fly ash aqueous solution.

SUSTAINABILITY (2023)

Article Environmental Sciences

Treatment of Fly-Ash-Contaminated Wastewater Loaded with Heavy Metals by Using Fly-Ash-Synthesized Iron Oxide Nanoparticles

Virendra Kumar Yadav et al.

Summary: Every year, a large amount of water is polluted by various sources, with coal fly ash (CFA) being a major pollutant. CFA contains toxic metals that contaminate water bodies through contact with water or rain. Iron oxide nanoparticles (IONPs), recovered from waste like CFA, show promise for wastewater treatment due to their low cost, recyclable nature, and magnetic property. The synthesis of IONPs from CFA involves three steps: extraction of ferrous materials, acidic treatment, and precipitation of iron oxides. The synthesized IONPs have a particle size of 30-70 nm and a purity of 90-93%. They can efficiently remove heavy metals from wastewater, particularly Pb and Cr ions from CFA solutions, with removal efficiency ranging from 40-70%.

WATER (2023)

Article Chemistry, Applied

Remediation of Azure A Dye from Aqueous Solution by Using Surface-Modified Coal Fly Ash Extracted Ferrospheres by Mineral Acids and Toxicity Assessment

Virendra Kumar Yadav et al.

Summary: Indian coal fly ash can be used to recover ferrous particles through wet magnetic separation. The extracted ferrous particles are spherical in shape, with varying sizes and a crystalline structure consisting of a mixture of hematite and magnetite. Surface-modified ferrospheres show potential as an economical and reusable adsorbent for dye remediation.

ADSORPTION SCIENCE & TECHNOLOGY (2022)

Article Biotechnology & Applied Microbiology

Recovery of iron nanominerals from sacred incense sticks ash waste collected from temples by wet and dry magnetic separation method

Nitin Gupta et al.

Summary: Indian incense stick ash contains about 4%-8% ferrous iron, which is primarily sourced from coal powder. Wet-slurry magnetic separation is found to be a more efficient method for separating ferrous iron, with higher purity levels compared to dry magnetic separation. Analysis using various techniques revealed that the recovered ferrous iron particles are micro-crystalline, spherical in shape, and sized between 40 and 120 nm.

ENVIRONMENTAL TECHNOLOGY & INNOVATION (2022)

Review Green & Sustainable Science & Technology

Fly ash application in soil for sustainable agriculture: an Indian overview

Ayushi Varshney et al.

Summary: Fly ash, a challenging solid waste generated from coal combustion, has caused various environmental problems worldwide. However, it has been recognized as a valuable material for soil amendment in agriculture as it improves the physical and chemical properties of soil and enhances crop growth. This review explores the Indian scenario of fly ash incorporation in different soils for improved crop production and sustainable agriculture.

ENERGY ECOLOGY AND ENVIRONMENT (2022)

Article Chemistry, Multidisciplinary

Partial oxidation of methane over biomass fly ash (BFA)-supported Ni/CaO catalyst for hydrogen-rich syngas production

Nida Naeem et al.

Summary: In this study, a Ni/CaO catalyst supported by biomass fly ash (BFA) was successfully synthesized and characterized. The results showed that the Ni/CaO-BFA catalyst exhibited superior catalytic performance in the partial oxidation of methane (POM), with potential for efficient synthesis of liquid fuels.

RESEARCH ON CHEMICAL INTERMEDIATES (2022)

Article Engineering, Environmental

A thermodynamics-guided framework to design lightweight aggregate from waste coal combustion fly ash

Mohammad Balapour et al.

Summary: A systematic thermodynamics-based framework was used to recycle waste coal combustion fly ash into synthetic lightweight aggregates through sintering. The process requires a delicate balance among liquid phase formation, viscosity, and gas emission. Thermodynamics modeling and analysis techniques such as thermogravimetric analysis and X-ray computed tomography were used to quantify and observe different aspects of the process.

RESOURCES CONSERVATION AND RECYCLING (2022)

Review Geochemistry & Geophysics

Status of Coal-Based Thermal Power Plants, Coal Fly Ash Production, Utilization in India and Their Emerging Applications

Virendra Kumar Yadav et al.

Summary: Both fossil fuels and renewable energy sources are widely used for electricity production globally. However, the dependency on fossil fuels leads to the depletion of reserves and pollution. The production of coal fly ash (CFA) in thermal power plants is a major issue, with millions of tons being generated annually. There is a need for efficient and sustainable management approaches for CFA utilization.

MINERALS (2022)

Article Engineering, Environmental

Separation of unburned carbon from coal fly ash: Pre-classification in liquid-solid fluidized beds and subsequent flotation

Bo Lv et al.

Summary: Coal fly ash is a solid waste that causes serious environmental problems. This study improved the quality of coal fly ash through pre-classification and flotation, providing a theoretical basis for the harmless and resource treatment of coal fly ash.

PROCESS SAFETY AND ENVIRONMENTAL PROTECTION (2022)

Article Chemistry, Physical

A new CuZr2S4/rGO and their reduced graphene oxide nanocomposities enhanced photocatalytic and antimicrobial activities

G. Gnanamoorthy et al.

Summary: CuZr2S4 and CuZr2S4/rGO nanocomposites were successfully prepared using the hydrothermal method with potential high-quality performances. Characterization using XRD, FT-IR, Raman, FE-SEM, etc. showed that these nanocomposites exhibit good photocatalytic activity and antibacterial properties.

CHEMICAL PHYSICS LETTERS (2021)

Article Environmental Sciences

Morphology and chemical composition of mineral matter present in fly ashes of bituminous coal and lignite

E. Strzalkowska

Summary: This paper explores the management of fly ashes from bituminous coal and lignite by identifying particles with different morphological and chemical compositions through microscopic observation and research techniques. The study examines the potential applications of the ashes and proposes magnetic separation of iron-rich particles as a method of management for full utilization.

INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY (2021)

Review Crystallography

Recent Advances in Methods for the Recovery of Carbon Nanominerals and Polyaromatic Hydrocarbons from Coal Fly Ash and Their Emerging Applications

Javed Alam et al.

Summary: Coal fly ash is a key pollutant worldwide due to its toxic heavy metal content, but advancements in technology have led to its importance in emerging fields. Recovering carbonaceous nanoparticles from coal fly ash using trending techniques allows for the development of carbon-derived value-added materials and nanocomposites in various industries. The latest applications of carbon particles from coal fly ash are emphasized in industry.

CRYSTALS (2021)

Article Energy & Fuels

Characterization and thermal properties of a shape-stable Na2CO3-K2CO3/coal fly ash/expanded graphite composite phase change materials for high-temperature thermal energy storage

Tieying Wang et al.

Summary: The addition of expanded graphite led to changes in the morphology and pores of the composite, increasing surface area and pore size. Despite slight decreases in specific heat capacity and latent heat, the thermal conductivity of the composite increased with expanded graphite content. The composite with 6 wt.% expanded graphite exhibited excellent thermal storage property and thermal conductivity.

JOURNAL OF ENERGY STORAGE (2021)

Article Environmental Sciences

Variations and similarities in structural, chemical, and elemental properties on the ashes derived from the coal due to their combustion in open and controlled manner

Virendra Kumar Yadav et al.

Summary: Coal fly ash (CFA) and coal-based incense sticks ash (ISA) have similarities and differences due to the presence of coal, with CFA generated from coal combustion in thermal power plants and ISA from incense sticks burning. Analysis showed that CFA contains well-organized spherical particles while ISA particles are irregular and aggregated, with different mineral compositions and structures.

ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH (2021)

Article Chemistry, Physical

Development and Characterization of Lightweight Geopolymer Composite Reinforced with Hybrid Carbon and Steel Fibers

Agnieszka Baziak et al.

Summary: This paper aims to analyze the impact of hybrid fiber reinforcement on the properties of a lightweight geopolymer composite. Steel fibers and carbon fibers were used as reinforcement materials to improve compressive and bending strength. The results demonstrate that the addition of fibers enhances the mechanical properties of the composite, with the best performance achieved through hybrid reinforcement.

MATERIALS (2021)

Article Chemistry, Multidisciplinary

Composition-Structure Relationship and Routes of Formation of Blocklike Ferrospheres Produced by Pulverized Combustion of Two Coal Types

Natalia N. Anshits et al.

Summary: The composition-structure relationship of blocklike ferrospheres isolated from fly ash produced during the combustion of different types of coal was systematically studied. It was found that monoblock globules consist of large sintered crystallites of Mg, Mn ferrospinel, formed from excluded siderite particles containing isomorphic impurities of magnesium and manganese carbonates. SEM analysis showed that as the FeO concentration in individual globules decreases, the crystallite size of ferrospinel decreases, while the content of the glass phase increases.

ACS OMEGA (2021)

Article Chemistry, Multidisciplinary

Coal Fly Ash Decorated with Graphene Oxide-Tungsten Oxide Nanocomposite for Rapid Removal of Pb2+ Ions and Reuse of Spent Adsorbent for Photocatalytic Degradation of Acetaminophen

Emmanuel Christopher Umejuru et al.

Summary: Coal fly ash was used to produce a nanocomposite for lead ion removal, and the spent adsorbent loaded with lead ions was reused for the photodegradation of acetaminophen with a high degradation efficiency of 93%. The reuse as a photocatalyst significantly reduces secondary waste from conventional adsorption methods.

ACS OMEGA (2021)

Article Energy & Fuels

Recycling of Coal Fly Ash as an Example of an Efficient Circular Economy: A Stakeholder Approach

Oksana Marinina et al.

Summary: This paper examines the issue of coal fly ash recycling from the perspective of stakeholders, assessing the economic benefits and conflicts of interest in such projects and highlighting the reasons for the low interest of the Russian private sector, which include a lack of market incentives and high risks associated with clean coal technologies.

ENERGIES (2021)

Article Engineering, Environmental

Pretreatment method for the utilization of the coal ash landfilled in ash ponds

Namil Um et al.

Summary: A method for improving the utilization of coal pond ash was proposed in the study, based on investigation of its characteristics and a series of separation experiments. A pretreatment method was developed to categorize the final materials and six additional pretreatment methods were suggested. The applicability of this method to coal pond ash in South Korea was confirmed.

PROCESS SAFETY AND ENVIRONMENTAL PROTECTION (2021)

Article Engineering, Environmental

Removal of disperse orange and disperse blue dyes present in textile mill effluent using zeolite synthesized from cenospheres

Markandeya et al.

Summary: The research investigated an efficient and eco-friendly method of using coal fly ash in the form of zeolite to treat wastewater with dyes. Response surface methodology was employed to evaluate the effect of process parameters on the removal of dyes, and optimal conditions were identified for maximum removal of Disperse Orange 25 and Disperse Blue 79:1. The study concluded that cenospheres derivatized zeolite adsorbent is efficient, environmentally friendly, cost-effective and shows high potential for removing DO and DB dyes from aqueous solutions.

WATER SCIENCE AND TECHNOLOGY (2021)

Review Green & Sustainable Science & Technology

A Review of the Utilization of Coal Bottom Ash (CBA) in the Construction Industry

Syakirah Afiza Mohammed et al.

Summary: Coal bottom ash waste can be utilized as a substitute material in the construction industry to reduce environmental pollution and costs.

SUSTAINABILITY (2021)

Article Crystallography

Crystal Growth on Cenospheres from High-Calcium Fly Ash

Sorachon Yoriya et al.

Summary: This study presents a successful cenosphere separation from high-calcium lignite fly ash using the centrifugal method for the first time, investigating the effects of centrifugal parameters on cenosphere yield and properties, and establishing the relationship between chemical composition and mineral phases. The preferential formation of calcite by cenospheres and stable growth behavior of crystallite sizes under different centrifugal conditions were highlighted through comparison with results obtained from the sink-float method. The study also discussed the influence and limitation of the centrifugal method, varied parameters, and relevant reaction pathways on crystal growth process.

CRYSTALS (2021)

Review Crystallography

Recent Advances in Methods for Recovery of Cenospheres from Fly Ash and Their Emerging Applications in Ceramics, Composites, Polymers and Environmental Cleanup

Virendra Kumar Yadav et al.

Summary: Coal fly ash (CFA) is a major global pollutant produced during the generation of electricity by thermal power plants. CFA contains value-added components such as cenospheres, which are widely utilized in ceramics, fireproofing materials, and wastewater treatment due to their lightweight nature and high mechanical strength.

CRYSTALS (2021)

Review Multidisciplinary Sciences

Fly ash properties, characterization, and applications: A review

Seham S. Alterary et al.

Summary: Fly ash is an industrial waste byproduct from burning solid fuels, mainly composed of unburned carbon, metal oxides, and other inorganic substances. It is commonly utilized for wastewater treatment and has promising beneficial applications in the construction industry, particularly in cement and concrete production.

JOURNAL OF KING SAUD UNIVERSITY SCIENCE (2021)

Article Chemistry, Multidisciplinary

Magnetic Fractions of PM2.5, PM2.5-10, and PM10 from Coal Fly Ash as Environmental Pollutants

Elena Fomenko et al.

Summary: Characterization of magnetic particulate matter in coal fly ashes is crucial for evaluating health risks from industrial coal combustion and future applications. This study successfully separated magnetic narrow fractions related to hazardous PM2.5, PM2.5-10, and PM10 for the first time and identified their major components and phase composition. Mossbauer spectroscopy and magnetic measurements confirmed the formation mechanism of nanoscale epsilon-Fe2O3 particles.

ACS OMEGA (2021)

Article Construction & Building Technology

Classification and Milling Increase Fly Ash Pozzolanic Reactivity

Ruben Snellings et al.

Summary: Upcycling and reclaiming low-quality or stored coal combustion fly ashes can provide a large resource of supplementary cementitious materials for low-carbon blended cements. This study compared the impact of size classification and milling treatments on the reactivity of a siliceous fly ash, showing significant increases in reactivity with fine classified and milled fly ash. Increasing the inherent reactivity of fly ashes was found to be an effective way to improve strength development in blended cements.

FRONTIERS IN BUILT ENVIRONMENT (2021)

Review Materials Science, Multidisciplinary

Formation mechanism and applications of cenospheres: a review

Aamar Danish et al.

JOURNAL OF MATERIALS SCIENCE (2020)

Review Biochemistry & Molecular Biology

The health effects of ultrafine particles

Dean E. Schraufnagel

EXPERIMENTAL AND MOLECULAR MEDICINE (2020)

Article Geochemistry & Geophysics

The Effect of Fly Ash Microspheres on the Pore Structure of Concrete

Elzbieta Haustein et al.

MINERALS (2020)

Review Environmental Sciences

A review on fly ash from coal-fired power plants: chemical composition, regulations, and health evidence

Kristina M. Zierold et al.

REVIEWS ON ENVIRONMENTAL HEALTH (2020)

Review Energy & Fuels

Incineration Fly Ash and Its Treatment to Possible Utilization: A Review

Altaf Hussain Kanhar et al.

ENERGIES (2020)

Review Construction & Building Technology

Sustainable application of cenospheres in cementitious materials - Overview of performance

Adeyemi Adesina

DEVELOPMENTS IN THE BUILT ENVIRONMENT (2020)

Review Nanoscience & Nanotechnology

Cenospheres and their application advantages in biomedical engineering - a systematic review

Damian S. Nakonieczny et al.

REVIEWS ON ADVANCED MATERIALS SCIENCE (2020)

Review Materials Science, Ceramics

Advances in Methods for Recovery of Ferrous, Alumina, and Silica Nanoparticles from Fly Ash Waste

Virendra Kumar Yadav et al.

CERAMICS-SWITZERLAND (2020)

Review Environmental Sciences

Progressive utilisation prospects of coal fly ash: A review

Anjani R. K. Gollakota et al.

SCIENCE OF THE TOTAL ENVIRONMENT (2019)

Article Chemistry, Multidisciplinary

Separation of Cenospheres from Lignite Fly Ash Using Acetone-Water Mixture

Sorachon Yoriya et al.

APPLIED SCIENCES-BASEL (2019)

Review Chemistry, Multidisciplinary

Applications of fly ash for CO2 capture, utilization, and storage

Abdallah Dindi et al.

JOURNAL OF CO2 UTILIZATION (2019)

Article Polymer Science

Hyperthermal atomic oxygen durable transparent silicon-reinforced polyimide

Min Qian et al.

HIGH PERFORMANCE POLYMERS (2019)

Article Environmental Sciences

Coal fly ash and steel slag valorisation throughout a vitrification process

H. R. Guzman-Carrillo et al.

INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY (2018)

Article Materials Science, Multidisciplinary

Composition and Structure of Block-Type Ferrospheres Isolated from Calcium-Rich Power Plant Ash

N. N. Anshits et al.

INORGANIC MATERIALS (2018)

Article Chemistry, Applied

Synthesis and structure of analcime and analcime-zirconia composite derived from coal fly ash cenospheres

Tatiana A. Vereshchagina et al.

MICROPOROUS AND MESOPOROUS MATERIALS (2018)

Article Nanoscience & Nanotechnology

Effect of cenosphere content on the compressive deformation behaviour of aluminum-cenosphere hybrid foam

Shyam Birla et al.

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING (2017)

Article Chemistry, Multidisciplinary

Direct Synthesis of Zeolites from a Natural Clay, Attapulgite

Xing-Yang Li et al.

ACS SUSTAINABLE CHEMISTRY & ENGINEERING (2017)

Article Materials Science, Multidisciplinary

Micropore Structures in Cenosphere-Containing Cementitious Materials Using Micro-CT

Seyoon Yoon et al.

ADVANCES IN MATERIALS SCIENCE AND ENGINEERING (2017)

Article Energy & Fuels

Characteristics of ferrospheres in fly ashes derived from Bokaro and Jharia (Jharkand, India) coals

Bruno Valentim et al.

INTERNATIONAL JOURNAL OF COAL GEOLOGY (2016)

Article Chemistry, Multidisciplinary

Integrated Synthesis of Zeolites Using Coal Fly Ash: Element Distribution in the Products, Washing Waters and Effluent

Suzana F. Ferrarini et al.

JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY (2016)

Article Environmental Sciences

C60 fullerenes from combustion of common fuels

Andrea J. Tiwari et al.

SCIENCE OF THE TOTAL ENVIRONMENT (2016)

Article Energy & Fuels

Characterization of Ferrospheres Recovered from High-Calcium Fly Ash

Olga M. Sharonova et al.

ENERGY & FUELS (2015)

Review Multidisciplinary Sciences

Suitability of leaching test methods for fly ash and slag: A review

Manoj Kumar Tiwari et al.

JOURNAL OF RADIATION RESEARCH AND APPLIED SCIENCES (2015)

Article Multidisciplinary Sciences

Coal Fly Ash Ceramics: Preparation, Characterization, and Use in the Hydrolysis of Sucrose

Ricardo Pires dos Santos et al.

SCIENTIFIC WORLD JOURNAL (2014)

Review Chemistry, Multidisciplinary

A multi-directional utilization of different ashes

Noor-ul-Amin

RSC ADVANCES (2014)

Review Energy & Fuels

A review of the multi-component utilisation of coal fly ash

R. S. Blissett et al.

Article Materials Science, Ceramics

The effect of fluidized fly ash on the properties of dry pressed ceramic tiles based on fly ash-clay body

Radomir Sokolar et al.

CERAMICS INTERNATIONAL (2011)

Article Engineering, Chemical

Performance of dry-separation processes in the recovery of cenospheres from fly ash and their implementation in a recovery unit

H. T. B. M. Petrus et al.

INTERNATIONAL JOURNAL OF MINERAL PROCESSING (2011)

Article Engineering, Environmental

Magnetic separation of coal fly ash from Bulgarian power plants

Annie S. Shoumkova

WASTE MANAGEMENT & RESEARCH (2011)

Article Chemistry, Physical

Adsorption of basic fuchsin using waste materials-bottom ash and deoiled soya-as adsorbents

V. K. Gupta et al.

JOURNAL OF COLLOID AND INTERFACE SCIENCE (2008)

Article Engineering, Multidisciplinary

Microstructure of ferrospheres in fly ashes: SEM, EDX and ESEM analysis

Qing-feng Xue et al.

JOURNAL OF ZHEJIANG UNIVERSITY-SCIENCE A (2008)

Article Energy & Fuels

Characterization of ash cenospheres in fly ash from Australian power stations

Ling-Lagee Ngu et al.

ENERGY & FUELS (2007)

Article Energy & Fuels

Fly ash characterization by SEM-EDS

Barbara G. Kutchko et al.

Article Engineering, Chemical

Removal of zinc from aqueous solutions using bagasse fly ash a low cost adsorbent

VK Gupta et al.

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH (2003)

Article Physics, Atomic, Molecular & Chemical

Iron minerals in coal, weathered coal and coal ash - SEM and Mossbauer results

FB Waanders et al.

HYPERFINE INTERACTIONS (2003)

Article Construction & Building Technology

Physical, chemical, mineralogical, and thermal properties of cenospheres from an ash lagoon

PK Kolay et al.

CEMENT AND CONCRETE RESEARCH (2001)