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Re: incineration of CU2+ salt of chlorpphenols gives less PCDD/F?
Tony Tweedale wrote:
> jansson & sundstrom 'Formation of PCDD During Combustion of Chlorphenol
> Formulations' _Sci Tot Env_ 1-:209-17 ('79) (authors are/were with
> swedish EPA)
> have results giving the technical grade copper salt of 2,3,4,6-TeCP
> 10-10,000 times less 2-8 CDD than the sodium salt of the same CP, across
> 500 - 850 Deg. C combustion T's.
> can anyone offer a reason for such a result, given that Cu is supposed to
> be the best catlyst for PCDD formation? the article does not describe the
> sampling point (other than it being flue gas) on their pilot scale plant.
> they cite ahling et al _chemosphere_ 6 ('77) p/437 & p. 461 for more
> fyi, table 1 shows the 4-8 CDD/F contents (this was before people were
> grouping homolgues by 2,3,7,8 substitution or not) of the 4 CP formulations
> tested, before combustion:
> 2,4,6-TCP, K+: 11 ppm dioxins 158 ppm furans
> 2,3,4,6-TeCP, Na+: 6.4 ppm 12.5 ppm
> 2,3,4,6-TeCP, Cu++: 2.4 ppm 14 ppm
> PCP: 12.3 ppm 9.6 ppm
> on a lighter note, _Not Man Apart_ 13:3:9-10 (4/83), 'the Tragedy at Times
> Beach', which gives some details on the path of NEPACCo's hexachlorophenate
> manfacturing wastes sold to Russell Bliss, notes that 'Bob's Home Service'
> (!) was Missouri's only licesnsed haz waste facility.
> Tony Tweedale (Causality is a concept not subject to empirical
> demonstration. -David Hume)
john [tickets] divilleas[sp?] said at a baird and mcguire task force
meeting on dioxin that you get more dioxin off the vegitables you eat
then the smokestack. So I asked him if shipment of veggies was legal lol
he didnt like that question at all. but he was serious hard to believe