Solid-state conversion of fly ash to effective adsorbents for Cu removal from wastewater
Abstract
Solid-state conversion of fly ash to an amorphous aluminosilicate adsorbent (geopolymer) has been investigated under different conditions and the synthesised material has been tested for Cu2+ removal from aqueous solution. It has been found that higher reaction temperature and Na:FA ratio will make the adsorbents achieving higher removal efficiency. The adsorbent loading and Cu2+ initial concentration will also affect the removal efficiency while the adsorption capacity exhibits similarly at 30-40 degrees C. The adsorption capacity of the synthesised adsorbent shows much higher value than fly ash and natural zeolite. The capacity is 0.1, 3.5 and 92 mg/g, for fly ash, natural zeolite, and FA derived adsorbent, respectively. The kinetic studies indicate that the adsorption can be fitted by the second-order kinetic model. Langmuir and Freundlich isotherms also can fit to the adsorption isotherm.
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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 [170]
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- Authors
- Wang, S., Li, L., & Zhu, Z. H.
- Affiliations
- Curtin University (AU)
- Chinese Academy of Sciences (CN)
- Corresponding author
- Wang, Shaobin
- Venue
- Journal of Hazardous Materials
- Publisher
- Elsevier BV
- Published
- 2007-01
- Volume
- 139
- Issue
- 2
- Pages
- 254-259
- ISSN
- 0304-3894 (ISSN-L)
- OpenAlex
- W2009580326
- Cited by
- 220
- References
- 20
- Citations by year
- 2026: 3 · 2025: 11 · 2024: 14 · 2023: 9 · 2022: 11 · 2021: 17 · 2020: 14 · 2019: 24 · 2018: 19 · 2017: 20 · 2016: 15 · 2015: 12 · 2014: 10 · 2013: 9 · 2012: 10
- FWCI
- 5.43
- 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 › Chemistry › Inorganic Chemistry › Zeolite Catalysis and Synthesis
- Keywords
- fly ash, geopolymer, copper removal, heavy metal adsorption, wastewater treatment, solid-state conversion, adsorption kinetics, second-order kinetics, Langmuir isotherm, Freundlich isotherm, reaction temperature
- MeSH terms
- Adsorption, Aluminum Silicates, Carbon, Copper, Kinetics, Temperature, Water Pollutants, Chemical, Zeolites, Water Purification, Particulate Matter, Coal Ash
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