A study on removal characteristics of heavy metals from aqueous solution by fly ash
Abstract
The purpose of this study was to investigate the possibility of the utilization of coal fly ash as a low cost adsorbent. Batch experiments were conducted to evaluate the removal of heavy metals from aqueous solutions by fly ash under various conditions of metal concentration, pH and fly ash dosage. The heavy metals used in this study were zinc, lead, cadmium and copper. Adsorption studies were done at various pH values (3-10) at 25 degrees C and at heavy metal concentrations of 10-400 mg/L using fly ash concentrations of 10, 20 and 40 g/L, respectively. Experiments were also conducted without fly ash to determine the extent of heavy metal removal by precipitation. Kinetic experiments were also performed and the zeta-potentials of the fly ash particles were measured at various pH's. The adsorption data was described by the Freundlich adsorption model. The test results using real wastewater indicated that fly ash could be used as a cheap adsorbent for the removal of heavy metals in aqueous solutions if not strongly acidic.
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Coal fly ash (CFA) is a valuable and desirable additive to cement concrete because of its spherical shape and pozzolanic properties.
“Coal fly ash (CFA) is a valuable and desirable additive to cement concrete because of its spherical shape and pozzolanic properties.160,161”
From Sustainable hybrid photocatalysts: titania immobilized on carbon materials derived from renewable and biodegradable resources (2016) · cites this paper as [160]
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References 16 · Cited by 356
- Authors
- CHO, H., OH, D., & KIM, K.
- Affiliations
- Seoul National University (KR)
- Corresponding author
- CHO, H
- ORCID
- KIM, K
- Venue
- Journal of Hazardous Materials
- Publisher
- Elsevier BV
- Published
- 2005-12-09
- Volume
- 127
- Issue
- 1-3
- Pages
- 187-195
- ISSN
- 0304-3894 (ISSN-L)
- OpenAlex
- W2001194212
- Cited by
- 356
- References
- 16
- Citations by year
- 2026: 8 · 2025: 11 · 2024: 11 · 2023: 12 · 2022: 20 · 2021: 18 · 2020: 24 · 2019: 22 · 2018: 27 · 2017: 20 · 2016: 29 · 2015: 18 · 2014: 22 · 2013: 22 · 2012: 16
- FWCI
- 14.08
- 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 › Environmental Science › Water Science and Technology › Coagulation and Flocculation Studies
- Keywords
- coal fly ash, heavy metal removal, adsorption, low-cost adsorbent, zinc, lead, cadmium, copper, wastewater treatment, Freundlich isotherm, adsorption kinetics, pH effect, zeta potential, precipitation chemistry
- MeSH terms
- Adsorption, Cadmium, Carbon, Copper, Hydrogen-Ion Concentration, Lead, Chemical Precipitation, Water Pollutants, Chemical, Zinc, Water Purification, Metals, Heavy, Particulate Matter, Coal Ash
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