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incineration of CU2+ salt of chlorpphenols gives less PCDD/F?
jansson & sundstrom 'Formation of PCDD During Combustion of Chlorphenol
Formulations' _Sci Tot Env_ 1-:209-17 ('79) (authors are/were with
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)