| Humic acid adsorption on fly ash and its derived unburned carbon. | |
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MedLine Citation:
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PMID: 17628583 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Fly ash is solid waste from combustion process, containing oxide minerals and unburned carbon. In this investigation, fly ash has been separated into metal oxide mineral section and unburned carbon. The fly ash with different contents of unburned carbon was employed for humic acid adsorption to investigate the influence of unburned carbon on adsorption. It is found that metal oxides and unburned carbon in fly ash exhibit significant difference in humic acid adsorption. The unburned carbon plays the major role in adsorption. Higher content of unburned carbon in fly ash results in higher surface area and thus higher humic acid adsorption. Fly ash and unburned carbon exhibit adsorption capacity of humic acid of 11 and 72 mg/g, respectively, at 30 degrees C, pH 7. Humic acid adsorption is also affected by ion strength, pH, and temperature. The thermodynamic calculations indicate that the adsorption is endothermic nature with DeltaH(0) and DeltaS(0) as 5.79 kJ/mol and 16.0 J/K mol, respectively. |
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Authors:
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Shaobin Wang; Z H Zhu |
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Publication Detail:
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Type: Journal Article Date: 2007-06-23 |
Journal Detail:
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Title: Journal of colloid and interface science Volume: 315 ISSN: 0021-9797 ISO Abbreviation: J Colloid Interface Sci Publication Date: 2007 Nov |
Date Detail:
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Created Date: 2007-09-24 Completed Date: 2008-02-20 Revised Date: 2009-11-11 |
Medline Journal Info:
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Nlm Unique ID: 0043125 Medline TA: J Colloid Interface Sci Country: United States |
Other Details:
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Languages: eng Pagination: 41-6 Citation Subset: IM |
Affiliation:
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Department of Chemical Engineering, Curtin University of Technology, GPO Box U1987, Perth, WA 6845, Australia. shaobin.wang@curtin.edu.au |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adsorption Carbon / chemistry* Humic Substances* Hydrogen-Ion Concentration Incineration* Particle Size Particulate Matter / chemistry Surface Properties Thermodynamics Time Factors Water Pollutants, Chemical / isolation & purification* Water Purification / methods* |
| Chemical | |
Reg. No./Substance:
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0/Humic Substances; 0/Particulate Matter; 0/Water Pollutants, Chemical; 68131-74-8/fly ash; 7440-44-0/Carbon |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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