Nik
They are both compounds associated with the
carbonisation of coal and are therefore found along with some other
rather obscure compounds such as azobenzene in coal tar. They were
produced at the high carbonisation temperatures you would associate with
coking plants and gasworks operations which did not produce dioxins,
which were produced at lower carbonisation temperatures. They would have
also been produced to some degree from the incomplete combustion of coal
in fires, furnaces etc, so like PAH they could have been deposited
through aerial disposition from chimney stacks historically. I believe
that they are relatively recalcitrant to biodegradation.
Best Regards
Dr Russell Thomas
BSc(Hons), PhD, CBIOL, MIBIOL, MIENVSc, CEnv, MSCI
Principal Scientist, Communities
Parsons Brinckerhoff
44-(0)7879-602-509
From: Contaminated Land Management Discussion List
[mailto:[log in to unmask]] On Behalf Of Nik
Reynolds
Sent: 07 October 2009 14:41
To: [log in to unmask]
Subject: Carbazole and dibenzofuran
Apologies if this query is blindingly obvious, but being a geologist
rather than a chemist/toxicologist... (re: Corby enquiry), can anyone
tell me why carbazole and dibenzofuran tend to be intrinsically linked.
These are common compounds which crop up again and again with SVOC
suites and are often the only compounds with positive results (above
lod).
Regards
Nik
Mr N Reynolds
BSc(Hons), MSc, CGeol, FGS, EurGeol
Senior Environmental Geologist
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