Re: Does dioxin toxicity increase in the environment??

[DrBillC@aol.com]

  Most of the things I''ve seen recently seem to show that the higher
  chlorinated materials are both more stable and less reactive (those are two
  different things) and also are less volatile.
  
  Destruction reactions are mostly gas phase rather than sorbed on solids.
   What this means is vvolatilization as well as photolysis or hydroxlation of
  the octa are the rate determining steps: all others are faster, and there
  would not tend to be an increase in TEQ due to buildup of lower chlorinated
  congeners.
  
  This squares well with the difference seen between the fingerprint of sources
  of emission (generally more furans and higher in penta) vs. environmental
  samples (generally higher chlorinated and dioxins).
  
  Bill Carroll
  Chlorine Chemistry Council