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Re: cement kilns
This may be a little naive, but please bear with me.
If a cement kiln uses natural gas or electricity for the kiln,
and the source of the cement is ordinary, pure, Portland
cement and non-contaminated fill, then a cement kiln
should have ZERO dioxin output, since there are few
sources of benzene rings and chlorine.
If a kiln uses contaminated ingredients containing
organochlorines, then you'll get dioxin.
If a kiln uses contaminated fuel, such as hazwaste
containing organochlorines, then you'll get dioxin.
If a kiln uses diesel fuel, which is oil cracked with
organochlorine solvents, then you'll get dioxin.
I believe, from reading those sections of Dying From Dioxin,
that the EPA believes that a fairly substantial amount of
the airborne dioxin contamination in the U.S. comes from
cement kilns that burn hazwaste.
It is a victory for the environment to get a cement kiln
to stop using hazwaste as a fuel. All that burning hazwaste
does is transfer its hazardous constituents into the sky and
into toxic ash. Not a good thing.
If, after a cement kiln stops using hazwaste for fuel, it is
still producing dioxin, then we find out what is causing the
production of dioxin and stop it. End of story. Further
contamination by dioxin must stop. No matter where
it comes from. Period. It would be
really silly if we need to debate this point, wouldn't it????