| EPR characterization of the catalytic activity of clays for PCE removal by gamma-radiation induced by acid and thermal treatments. | |
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MedLine Citation:
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PMID: 15519383 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Clays from tidal flat sediments showed efficient catalytic activity in the decomposition of PCE by gamma-radiation. The highest PCE removal of 98.6% was obtained with clays heated to 700 degrees C after acid treatment. The improved catalytic activity was identified by electron paramagnetic resonance (EPR) spectroscopy. The EPR spectra of clays were significantly changed by the acid and thermal treatments. The intensity of a narrow signal at g=2 (signal III) was decreased with increasing thermal treatment temperature and this increased the PCE removal efficiency. The acid treatment completely removed a broad signal at g=2 (signal II), decreased the intensity of signal III, and improved the gamma-radiation treatment of PCE. |
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Authors:
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Hung-Ho Chung; Sang-Won Choi; Yong-Sik Ok; Jinho Jung |
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Publication Detail:
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Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Chemosphere Volume: 57 ISSN: 0045-6535 ISO Abbreviation: Chemosphere Publication Date: 2004 Dec |
Date Detail:
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Created Date: 2004-11-02 Completed Date: 2005-02-04 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 0320657 Medline TA: Chemosphere Country: England |
Other Details:
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Languages: eng Pagination: 1383-7 Citation Subset: IM |
Affiliation:
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Department of Industrial Chemistry, College of Engineering, Yosu National University, Yosu 550-749, South Korea. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Aluminum Silicates
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chemistry* Catalysis Electron Spin Resonance Spectroscopy Environmental Pollution / prevention & control Gamma Rays* Geologic Sediments / analysis* Hot Temperature* Hydrochloric Acid Korea Tetrachloroethylene / chemistry* |
| Chemical | |
Reg. No./Substance:
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0/Aluminum Silicates; 127-18-4/Tetrachloroethylene; 7647-01-0/Hydrochloric Acid |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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