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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