| Quasi-dynamic leaching characteristics of polychlorinated dibenzo-p-dioxins and dibenzofurans from raw and solidified waste incineration residues. | |
MedLine Citation:
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PMID: 18028984 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Quasi-dynamic leaching characteristics of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) from raw and solidified air pollution control (APC) residues were examined via a nine-time multiple leaching test. The effect of injected activated carbon in the APC residues on the PCDD/F leachability was also evaluated. When humic acid solution was used as a leachant, the leaching concentrations of PCDD/Fs fluctuated between the first and the fifth leaching, followed by a gradual increase and then suddenly reached maximum values at the leaching sequences around seventh and eighth. This significant enhancement in PCDD/F leachability was mainly due to an increase in the release of highly chlorinated PCDD/Fs. Leaching of PCDD/Fs with n-hexane was, in contrast, primarily caused by the partitioning of hydrophobic PCDD/Fs between the APC residue surface and the liquid phase of n-hexane. Consequently, the largest leaching concentrations for n-hexane tests achieved at the first leaching, followed by a decrease and reached plateaus. Solidification/stabilization (S/S) decreased the PCDD/F leachability up to the fifth leaching by the use of humic acid solution. However, S/S increased the PCDD/F leaching concentrations and rates with n-hexane. The activated carbon in APC residues significantly inhibited the release of PCDD/F with n-hexane. The inhibiting effect provided by activated carbon was, however, less significant by the use of humic acid solution. |
Authors:
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Hsing-Cheng Hsi; Lin-Chi Wang; Tsung-Hsien Yu; Guo-Ping Chang-Chien |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2007-10-29 |
Journal Detail:
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Title: Chemosphere Volume: 71 ISSN: 0045-6535 ISO Abbreviation: Chemosphere Publication Date: 2008 Mar |
Date Detail:
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Created Date: 2008-02-25 Completed Date: 2008-06-12 Revised Date: - |
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: 284-93 Citation Subset: IM |
Affiliation:
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Department of Safety, Health and Environmental Engineering, National Kaohsiung First University of Science and Technology, No 2, Juoyue Road, Nantsu, Kaohsiung 811, Taiwan, ROC. hchsi@ccms.nkfust.edu.tw <hchsi@ccms.nkfust.edu.tw> |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Benzofurans
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chemistry* Carbon / chemistry* Hexanes / chemistry Incineration* Refuse Disposal* Soil Pollutants / chemistry* Solubility Tetrachlorodibenzodioxin / analogs & derivatives*, chemistry Waste Disposal, Fluid / methods* |
| Chemical | |
Reg. No./Substance:
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0/Benzofurans; 0/Hexanes; 0/Soil Pollutants; 0/polychlorodibenzo-4-dioxin; 110-54-3/n-hexane; 132-64-9/dibenzofuran; 1746-01-6/Tetrachlorodibenzodioxin; 7440-44-0/Carbon |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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