Document Detail

Quasi-dynamic leaching characteristics of polychlorinated dibenzo-p-dioxins and dibenzofurans from raw and solidified waste incineration residues.
MedLine Citation:
PMID:  18028984     Owner:  NLM     Status:  MEDLINE    
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.
Hsing-Cheng Hsi; Lin-Chi Wang; Tsung-Hsien Yu; Guo-Ping Chang-Chien
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2007-10-29
Journal Detail:
Title:  Chemosphere     Volume:  71     ISSN:  0045-6535     ISO Abbreviation:  Chemosphere     Publication Date:  2008 Mar 
Date Detail:
Created Date:  2008-02-25     Completed Date:  2008-06-12     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0320657     Medline TA:  Chemosphere     Country:  England    
Other Details:
Languages:  eng     Pagination:  284-93     Citation Subset:  IM    
Department of Safety, Health and Environmental Engineering, National Kaohsiung First University of Science and Technology, No 2, Juoyue Road, Nantsu, Kaohsiung 811, Taiwan, ROC. <>
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MeSH Terms
Benzofurans / chemistry*
Carbon / chemistry*
Hexanes / chemistry
Refuse Disposal*
Soil Pollutants / chemistry*
Tetrachlorodibenzodioxin / analogs & derivatives*,  chemistry
Waste Disposal, Fluid / methods*
Reg. No./Substance:
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

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