Environmental-benign utilisation of fly ash as low-cost adsorbents
Abstract
Fly ash is a waste substance from thermal power plants, steel mills, etc. that is found in abundance in the world. In recent years, utilisation of fly ash has gained much attention in public and industry, which will help reduce the environmental burden and enhance economic benefit. In this paper, the technical feasibility of utilisation of fly ash as a low-cost adsorbent for various adsorption processes for removal of pollutants in air and water systems has been reviewed. Instead of using commercial activated carbon or zeolites, a lot of researches have been conducted using fly ash for adsorption of NO(x), SO(x), organic compounds, and mercury in air, and cations, anions, dyes and other organic matters in waters. It is recognised that fly ash is a promising adsorbent for removal of various pollutants. Chemical treatment of fly ash will make conversion of fly ash into a more efficient adsorbent for gas and water cleaning. Investigations also revealed that unburned carbon component in fly ash plays an important role in adsorption capacity. Directions for future research are also discussed.
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In other domains, coal fly ash is considered a forerunner for several applications in adsorption, material synthesis such as zeolites, geopolymers, ceramics, and as a catalyst support.
“In other domains, coal fly ash is considered as a forerunner for several applications in adsorption, 162-164 material synthesis such as zeolites, [165][166][167] geopolymers, 168-170 ceramics, 171,172 and as a catalyst support.[173][174][175]”
From Sustainable hybrid photocatalysts: titania immobilized on carbon materials derived from renewable and biodegradable resources (2016) · cites this paper as [164]
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Selective Adsorption of Heavy Metal Cations by Using Fly Ash
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ES&T Views: Wildlife Habitats- On Corporate Lands
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Natural zeolites as effective adsorbents in water and wastewater treatment
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Self-citation
- Authors
- WANG, S., & WU, H.
- Affiliations
- Curtin University (AU)
- Corresponding author
- WANG, S
- Venue
- Journal of Hazardous Materials
- Publisher
- Elsevier BV
- Published
- 2006-08-25
- Volume
- 136
- Issue
- 3
- Pages
- 482-501
- ISSN
- 0304-3894 (ISSN-L)
- OpenAlex
- W2079886032
- Cited by
- 497
- References
- 116
- Citations by year
- 2026: 9 · 2025: 13 · 2024: 24 · 2023: 24 · 2022: 15 · 2021: 18 · 2020: 35 · 2019: 24 · 2018: 30 · 2017: 32 · 2016: 26 · 2015: 32 · 2014: 28 · 2013: 28 · 2012: 25
- FWCI
- 29.24
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of Hazardous Materials (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Physical Sciences › Environmental Science › Water Science and Technology › Adsorption and biosorption for pollutant removal
- Physical Sciences › Earth and Planetary Sciences › Geochemistry and Petrology › Coal and Its By-products
- Physical Sciences › Engineering › Mechanical Engineering › Waste Management and Environmental Impact
- Keywords
- fly ash, low-cost adsorbent, waste utilization, air pollution control, water treatment, NOx adsorption, mercury removal, dye removal, heavy metal removal, unburned carbon, pollutant removal
- MeSH terms
- Absorption, Air Pollutants, Occupational, Air Pollution, Carbon, Coloring Agents, Industrial Waste, Mercury, Nitrogen Oxides, Organic Chemicals, Sulfur Oxides, Water Pollutants, Chemical, Particulate Matter, Coal Ash
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