| Synthesis and characterization of Fe-MCM-41 from rice husk silica by hydrothermal technique for arsenate adsorption. | |
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MedLine Citation:
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PMID: 20401518 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Rice husk (RH) agro-waste was used as a raw material for synthesizing mesoporous molecular sieves, MCM-41. The Fe-MCM-41 was prepared by the hydrothermal technique (HT), resulting in a higher surface area and crystallinity than when prepared under ambient conditions. In addition, a hexagonal structure was clearly seen with hydrothermal technique (HT) preparation. The adsorption of arsenate by HT-Fe-MCM-41 was investigated. The factors studied affecting arsenate adsorption capacity were ferric content in MCM-41, contact time, pH of solution, and initial arsenate concentration. It was found that HT-Fe-MCM-41 at the Si/Fe mole ratio of 10 gave the highest adsorption capacity. Arsenate adsorption reached equilibrium within 4 h. The adsorption capacity of HT-Fe-MCM-41 (Si/Fe = 10) was affected by the initial pH value and the initial arsenate concentration. The adsorption capacity was highest at pH 3 and decreased thereafter with increases in the pH of solution value. The Langmuir model fit the arsenate adsorption isotherm well. The maximum adsorption capacity for arsenate was 1,111 microg g(-1). |
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Authors:
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Kitirote Wantala; Suthipong Sthiannopkao; Bang-orn Srinameb; Nurak Grisdanurak; Kyoung Woong Kim |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2010-04-17 |
Journal Detail:
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Title: Environmental geochemistry and health Volume: 32 ISSN: 1573-2983 ISO Abbreviation: Environ Geochem Health Publication Date: 2010 Aug |
Date Detail:
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Created Date: 2010-07-08 Completed Date: 2010-11-03 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8903118 Medline TA: Environ Geochem Health Country: Netherlands |
Other Details:
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Languages: eng Pagination: 261-6 Citation Subset: IM |
Affiliation:
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Department of Chemical Engineering, Faculty of Engineering, Thammasat University, Pathumthani 10120, Thailand. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adsorption Arsenates / analysis, chemistry* Hydrogen-Ion Concentration Iron / chemistry* Models, Chemical Oryza sativa / chemistry Silicon Dioxide / chemical synthesis, chemistry*, isolation & purification Water Pollutants, Chemical / analysis, chemistry* Water Purification / methods* |
| Chemical | |
Reg. No./Substance:
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0/Arsenates; 0/MCM-41; 0/Water Pollutants, Chemical; 7439-89-6/Iron; 7631-86-9/Silicon Dioxide; 7778-39-4/arsenic acid |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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