World Library  


Add to Book Shelf
Flag as Inappropriate
Email this Book

Formation, Occurrence and Analysis of Polychlorinated Dibenzofurans, Dioxins and Related Compounds

By Buser, Hans-Rudolf

Click here to view

Book Id: WPLBN0000232990
Format Type: PDF eBook
File Size: 0.5 MB
Reproduction Date: 2005

Title: Formation, Occurrence and Analysis of Polychlorinated Dibenzofurans, Dioxins and Related Compounds  
Author: Buser, Hans-Rudolf
Volume:
Language: English
Subject: Government publications, United Nations., United Nations. Office for Disarmament Affairs
Collections: Government Library Collection, Disarmament Documents
Historic
Publication Date:
Publisher: United Nations- Office for Disarmament Affairs (Unoda)

Citation

APA MLA Chicago

Buser, H. R. (n.d.). Formation, Occurrence and Analysis of Polychlorinated Dibenzofurans, Dioxins and Related Compounds. Retrieved from http://worldebooklibrary.com/


Description
Government Reference Publication

Excerpt
Excerpt: In several accidents (fires, explosions) involving electrical systems containing polychlorinated biphenyls (PCBs) or benzenes (PCBZsl, the formation of polychlorinated tricyclic aromatic compounds such as polychlorinated dibenzofurans (PCDFs), dibenzo-p-dioxins (PCDDsI and biphenylenes (PCBPs) was obsewed. These findings were not surprising in light of our previous studies on the formation of PCDFs and PCDDs from the thermolysis (500-75OC in presence of air) of PCBs or PCBZs. In these experiments we identified three main and a fourth minor reaction pathway leading to PCDFs from PCBs. The three main reactions involved the loss of orthoCI, and the losses of ortho-HCI with and without a 2.3-chlorine shifl. The fourth, minor reaction route found with some PCBs, involved the loss of ortho-H. These reaction pathways were intramolecular cyelizations via oxidation to phenolic compounds. Thermolysis of commercial PCBs (Aroclor 1254 and 12fiOI yielded the same PCDF isomers as expected from the main PCB components via these four reaction pathways; the isomers farmed included the toxic 2,3,7,8-substituted tetra-, penta- and hexa-CDFs. Thermolysis of PCBZs involved complex condensation reactions with multiple rearrangements leading to PCDFs as well as PCDDs. Again oxidation to phenolic products was involved but the reaction routes are not yet fully elucidated.


 

Click To View

Additional Books


  • The General Accounting Office : Just the... (by )
  • Impatiens Pollen Germination and Tube Gr... (by )
  • Proximity to Crops and Residential Expos... (by )
  • Climate Change Policy : A Survey (by )
  • Metabolomics : Whats Happening Downstrea... (by )
  • Influence of Age on Metal Metabolism and... (by )
  • Effect of Maternal Smoking on Breast Mil... (by )
  • Indoor Exposures to Fine Aerosols and Ac... (by )
  • Important Aspects of the Evidence for Tc... (by )
  • Who Names Top 10 Health Risks (by )
  • Translating Translational Biomedicine fo... (by )
  • Carcinogenicity of Airborne Combustion P... (by )
Scroll Left
Scroll Right

 



Copyright © World Library Foundation. All rights reserved. eBooks from World eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.