Document Detail

Inhibition of PCDD/Fs formation from dioxin precursors by calcium oxide.
MedLine Citation:
PMID:  15946724     Owner:  NLM     Status:  MEDLINE    
Research aimed at understanding the inhibition effect of CaO on polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) formation form dioxins precursors, such as chlorophenols (CPs) and chlorobenzenes (CBs). The results indicated that a clear dioxin inhibition effect occurred both in open and sealed system when CaO was used. In the open system, PCDDs were the main congeners and the inhibition efficiency was all over 99% in the experiments. In the experiments with CaO, less than 0.1% of the initial PCP was detected in the absorption tube and only about 1% of the initial PCP was examined as calcium pentachlorophenate in the reaction tube. In the sealed system, the inhibition efficiency was over 90% at temperature range between 280 and 450 degrees C when PCP was used as model precursor. When HCB and 2,3,4,5-T4CP replaced PCP, significant inhibition effect was also observed. As CaO has the advantageous properties of non-toxicity and non-volatile nature, it is our hope that the result will contribute to the development of a new technique to cope with the problem of dioxin pollution in MWIs.
Wenbin Liu; Minghui Zheng; Bing Zhang; Yong Qian; Xiaodong Ma; Wenxia Liu
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Chemosphere     Volume:  60     ISSN:  0045-6535     ISO Abbreviation:  Chemosphere     Publication Date:  2005 Aug 
Date Detail:
Created Date:  2005-06-28     Completed Date:  2005-12-05     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0320657     Medline TA:  Chemosphere     Country:  England    
Other Details:
Languages:  eng     Pagination:  785-90     Citation Subset:  IM    
State Key laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing 100085, PR China.
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MeSH Terms
Air Pollution / prevention & control
Benzofurans / analysis,  chemistry*
Calcium Compounds*
Chlorophenols / chemistry*
Hexachlorobenzene / chemistry*
Pentachlorophenol / chemistry*
Tetrachlorodibenzodioxin / analogs & derivatives*,  analysis,  chemistry
Reg. No./Substance:
0/Benzofurans; 0/Calcium Compounds; 0/Chlorophenols; 0/Oxides; 0/chlorinated dibenzofurans; 0/polychlorodibenzo-4-dioxin; 118-74-1/Hexachlorobenzene; 1305-78-8/lime; 1746-01-6/Tetrachlorodibenzodioxin; 25167-83-3/tetrachlorophenol; 87-86-5/Pentachlorophenol

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